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Overview
Intel's 8-bit MCS® 51 microcontroller family consists of CHMOS versions of the original 8-bit microcontrollers. The MCS 51 microcontroller architecture is optimized for control-oriented applications. A variety of fast addressing modes for accessing the internal RAM facilitates byte processing and numerical operations on small data structures. The instruction set provides a convenient menu of 8-bit arithmetic instructions, including multiply and divide instructions. Extensive on-chip support is provided for 1-bit variables as a separate data type, allowing direct bit manipulation and testing in control and logic systems that require Boolean processing.

Intel offers a wide variety of MCS 51 controllers with different levels of on-chip peripherals and memory. The MCS 51 microcontroller family includes versions with on-chip EPROM, One-Time Programmable (OTP) and ROM memory, as well as CPU-only microcontrollers. Intel's proven CHMOS technology provides lower power, higher integration and higher performance in this line of controllers.

FEATURES BENEFITS
8-bit CPU optimized for event control Efficient. Event control design
Boolean processing Ease. Simple bit manipulation
Flexibility. Enables single-chip designs
On-chip peripherals (timer/counters, serial ports, I/O ports, PCA, etc.) Integration. High integration enables low-cost and low-chip count designs
Extensive software and hardware programming support Easy to use. Simplifies your design cycle

Classic Family
Intel's 8-bit MCS 51 family of microcontrollers is a leading choice for embedded control. This Classic family consists of CHMOS versions of all the original 8-bit microcontrollers that introduced the MCS 51 microcontroller family. Intel offers a wide variety of on-board memory in EPROM and ROM, as well as CPU-only microcontrollers. Intel's proven CHMOS technology provides lower power, higher integration and higher performance.

High Speed Family
The MCS 51 high speed microcontrollers provide the current MCS 51 microcontroller product lines with increased frequency performances of up to 24 MHz and 33 MHz. For most MCS 51 customer designs that run at 12 MHz or 16 MHz today, performance can now be doubled with the new 24 MHz and 33 MHz versions. They are code and pin compatible with existing MCS 51 microcontrollers and therefore allow easy upgrade paths to all MCS 51 microcontroller applications that require a faster running part. The MCS 51 high speed microcontrollers bring you all the benefits you would expect from the original innovator of the MCS 51 microcontroller family.

The Intel MCS 51 high speed microcontrollers are based on the MCS 51 microcontroller architecture. They are code and pin compatible with the existing MCS 51 microcontrollers and therefore are direct "drop-in" replacements to existing MCS 51 microcontroller applications.

Low-Voltage Family
The 8XL5X and 8XL51FX are redesigned 3V versions of the MCS 51 microcontroller family. Operating Vcc ranges from 2.7V to 3.6V, and maximum frequency of 20 MHz, provide both low-voltage and high-performance benefits. They provide a compatible and ideal low-voltage migration path for customers who want to design low-power versions of their embedded designs.

Expanded RAM Family
The Intel 8xC51RA/RB/RC belong to the new Expanded RAM microcontroller series based on the MCS 51 microcontroller architecture. The 8xC51RA/RB/RC are code and pin compatible with the existing MCS 51 microcontrollers and therefore are direct `drop-in' replacements to existing MCS 51 microcontroller applications. These products are functionally compatible with the Intel 8xC52/54/58, except for the additional 256 Bytes of on-chip data RAM and hardware WDT. The new microcontrollers are specially designed to accomodate increased data parameter handling and usage of high level languages. The hardware WDT allows for increased system reliability.

MCS® 51 Microcontroller Family -- Application Specific

8XC51SL Microcontroller
The 8XC51SL is an integrated keyboard controller designed for power-sensitive, portable PCs. It offers functions such as a UPI host interface, keyboard scanning, power management, temperature/battery monitoring and external keyboard/mouse interface. Package option includes PQFP 100ld and SQFP 100ld, with 5V and 3.3V operations.

FEATURES BENEFITS
Same instruction set as MCS® 51 controllers; software compatible with 80C51 Synergy. Preserves design team knowledge and investment; no training required
Integration of 80C42-type host interface and keyboard scan Single-chip solution. Saves board space and lowers system cost, especially in small notebook environment
Four channels, 8-bit A/D Monitoring. Battery/CPU temperature and voltage monitoring
Interface for up to 32K of external memory Flexibility. Accommodates larger code; flexibility in manufacturing flow
Five LED drivers Reduces parts. Eliminates external discrete components
Two serial interfaces Support. Provides external serial keyboard and mouse support
Additional power management register set, 3.3V operation Efficiency. Enhanced power management function; provides greater power savings
100LD PQFP and SQFP packages Saves space. Small package size for board space savings


83C51KB Microcontroller
The 83C51KB is a highly integrated keyboard controller designed for the standard and advanced keyboards for desktop PC's. The integration of external components into the microcontroller reduces the overall keyboard control manufacturing cost in terms of the number of components used, the amount of PCB space required, reduced inventory and a reduction in the required assembly activities. Available in 40L PDIP package.

FEATURESBENEFITS
Same instruction set as MCS 51 controllers Synergy. Preserves code and knowledge investment
Direct drive LED outputs (13mA current sink capability) Reduces parts. Reduce components cost and board space
20pF on-chip cap for RC resonator
(4-6 MHz selectable frequency)
Cost effective. External crystal not required
Integrated power-on-reset circuitry Integration. Cost and space savings
8 dedicated Key Scan Input pins Efficiency. With external interrupts for
power management
16 dedicated Key Scan Output pins with Quasi-bidirectional port drivers Flexibility. No external resistors required and flexible board design
Clock/Data drivers to host
- Strong pull-up
- 8x42 compatible
- External interrupt on clock pin
Enhancement. Reduce component costs and provide efficient power management and compatibility
128B RAM with 128 bits that are bit-addressable Control. Code flexibility and easier control

Keyboard Hardware Using 83C51KB


8XC51GB Microcontroller
The 8XC51GB is an enhanced version of the 8XC51FA. Added features make it an even more powerful microcontroller for applications that require on-chip A/D, pulse width modulation, high-speed I/O, up/down counting capabilities and memory protection features. It also has a more versatile serial channel that facilitates multiprocessor communications.

FEATURES BENEFITS
Same instruction set as MCS® 51 microcontrollers and is software compatible with 80C51 Synergy. Preserves design team knowledge and investment; no training required
Enhanced interrupt structure with:
- 15 vectors (7 external, 8 internal)
- 4 programmable priority-level applications
Flexibility. Flexible and comprehensive interrupt handling capacity for interrupt-intensive applications; reduces CPU overhead to define proper interrupt routing for heavy interrupt-driven applications.
8-channel, 8-bit A/D converter:
- eight 8-bit result registers
- four programmable modes
- automatic comparator reference
- trigger input pin
A/D conversions. Intelligent, accurate A/D conversions allow:
- sequential A/D (one per channel)
- two start and sequencing modes to address any application need
- more precise A/D conversions
- minimal CPU overhead, simple interface
Two programmable counter arrays Precision. Precise event timing measurement and control capabilities
Half-duplex synchronous serial port Peripherals. More I/O peripherals expansion, such as off-chip (EEPROM)


8XC152JX Microcontroller
The 8XC152JA/JB/JC/JD, based on the MCS(R) 51 microcontroller architecture core, is a highly integrated, single-chip, 8-bit microcontroller designed for cost-sensitive, high-speed, multi-protocol serial communications. It is ideal for implementing ISDN, LAN and user-defined serial backplane applications.

FEATURES BENEFITS
Same instruction set as MCS 51 microcontrollers; software compatible with 80C51 Synergy. Preserves design team knowledge/investment; no training required
Fast data transfer with global serial channel Effective. High effective data-rate throughput
Serial protocol Cost effective. Cheaper and can be more reliable than parallel communications; easy to add and subtract nodes
Dual DMA channels Efficient. Frees CPU for other tasks; on-chip DMA controller simplifies system design and reduces board space
SDLC and other HDLC subsets Compatible. Supports proprietary and emerging ISDN applications such as PABX linecards and terminal adapters, and other proprietary networks as in programmable logic controllers
Carrier sense multiple-access/collision detect Compatible. Supports IEEE 8023 defined access and other proprietary access methods
Deterministic collision resolution scheme Unique. Determines worst-case access time; allows CSMA/CD to be used in real-time control environments; combines some of the best features of traditional methods-deterministic protocol with no polling overhead

Development Tools
The MCS 51 microcontroller product family is supported by a variety of development tools, including ApBUILDER and evaluation boards. ApBUILDER, Intel's interactive programming software, is a powerful tool that generates peripheral initialization code in ASM and C for Intel's embedded devices, with a click of the mouse. This free software tool, along with Hypertext User's Manuals, speeds the learning curve and can reduce total design time.

Project Builder Kits are low-cost (below US $200) development platforms that give design engineers all the hardware and software tools needed to fully evaluate device features and performance. These turn-key kits provide tools for every stage of the project design cycle.

Complete sets of development utilities and C compilers are available through third-party vendors. Many third-party vendors also provide in-circuit emulator development tools. Select the Development Tools button at the top of the page to access our tools database.

MCS® 51 Microcontroller Linecard

Product
ROM/EPROM (Bytes)
Register RAM (Bytes) Timer/ Counters Serial Port Analog Input Channels I/O Pins Speed (MHz) Process Package Security Temp. Key Features
Classic Family
80C31BH ROMless 128 2 1 0 32 12,16,24 CHMOS N, P, S N/A C, E, A, M Power Save Modes
80C51BH 4K ROM 128 2 1 0 32 12,16,24 CHMOS N, P, S P C, E, A, M Power Save Modes
87C51 4K EPROM/OTP 128 2 1 0 32 12,16,24,33 CHMOSD, N, P, S L3 C, E, A, M Three-Level Memory Lock
80C32 ROMless 256 3 1 0 32 12,16,24,33 CHMOS N, P, S N/A C, E, A Up-Down Timer/Counter
80C52 8K ROM 256 3 1 0 32 12,16,24,33 CHMOS N, P, S L1 C, E, A Up-Down Timer/Counter
87C52 8K EPROM/OTP 256 3 1 0 32 12,16,24,33 CHMOS D, N, P, S L3 C, E, A Up-Down Timer/Counter
80C54 16K ROM 256 3 1 0 32 12,16,24,33 CHMOS N, P, S L1 C, E, A Up-Down Timer/Counter
87C54 16K EPROM/OTP 256 3 1 0 32 12,16,24,33 CHMOS D, N, P, S L3 C, E, A Up-Down Timer/Counter
80C58
87C58, ROM
32K ROM 256 3 1 0 32 12,16,24,33 CHMOS N, P, S L1 C, E Up-Down Timer/Counter
87C58 32K EPROM/OTP 256 3 1 0 32 12,16,24,33 CHMOS D, N, P, S L3 C, E Up-Down Timer/Counter
80C51FA ROMless 256 3 1 0 32 12,16,24,33 CHMOS N, P, S N/A C, E, A Programmable Counter Array (PCA), Prog. Clock-Out
83C51FA 8K ROM 256 3 1 0 32 12,16,24,33 CHMOS N, P, S L1 C, E, A Programmable Counter Array (PCA), Prog. Clock-Out
87C51FA 8K EPROM/OTP 256 3 1 0 32 12,16,24,33 CHMOS D, N, P, S L3 C, E, A Programmable Counter Array (PCA), Prog. Clock-Out
83C51FB
87C51FB, ROM
16K ROM 256 3 1 0 32 12,16,24,33 CHMOS N, P, S L1 C, E, A Programmable Counter Array (PCA), Prog. Clock-Out
87C51FB 16K EPROM/OTP 256 3 1 0 32 12,16,24,33 CHMOS D, N, P, S L3 C, E, A, M Programmable Counter Array (PCA), Prog. Clock-Out
83C51FC
87C51FC, ROM
32K ROM 256 3 1 0 32 12,16,24,33 CHMOS N, P, S L1 C, E, A, M Programmable Counter Array (PCA), Prog. Clock-Out
87C51FC 32K EPROM/OTP 256 3 1 0 32 12,16,24,33 CHMOS D, N, P, S L3 C, E, A, M Programmable Counter Array (PCA), Prog. Clock-Out
Low-Voltage Family
**80L52
87L52, ROM
8K ROM 256 3 1 0 32 12,16,20* CHMOS N, S L1 C, E Low-Voltage, Up-Down Timer/Counter
**87L52 8K OTP 256 3 1 0 32 12,16,20* CHMOS N, S L3 C, E Low-Voltage, Up-Down Timer/Counter
**80L54
87L54,ROM
16K ROM 256 3 1 0 32 12,16,20* CHMOS N, S L1 C, E Low-Voltage, Up-Down Timer/Counter
**87L54 16K OTP 256 3 1 0 32 12,16,20* CHMOS N, S L3 C, E Low-Voltage, Up-Down Timer/Counter
**80L58
87L58, ROM
32K ROM 256 3 1 0 32 12,16,20* CHMOS N, S L1 C, E Low-Voltage, Up-Down Timer/Counter
**87L58 32K OTP 256 3 1 0 32 12,16,20* CHMOS N, S L3 C, E Low-Voltage, Up-Down Timer/Counter
**80L51FA ROMless 256 3 1 0 32 12,16,20* CHMOS N, S N/A C, E Low-Voltage, PCA, Prog. Clock-Out
**83L51FA
87L51FA, ROM
8K ROM 256 3 1 0 32 12,16,20* CHMOS N, S L1 C, E Low-Voltage, PCA, Prog. Clock-Out
**87L51FA 8K OTP 256 3 1 0 32 12,16,20* CHMOS N, S L3 C, E Low-Voltage, PCA, Prog. Clock-Out
**83L51FB
87L51FB, ROM
16K ROM 256 3 1 0 32 12,16,20* CHMOS N, S L1 C, E Low-Voltage, PCA, Prog. Clock-Out
**87L51FB 16K OTP 256 3 1 0 32 12,16,20* CHMOS N, S L3 C, E Low-Voltage, PCA, Prog. Clock-Out
**83L51FC
87L51FC, ROM
32K ROM 256 3 1 0 32 12,16,20* CHMOS N, S L1 C, E Low-Voltage, PCA, Prog. Clock-Out
**87L51FC 32K OTP 256 3 1 0 32 12,16,20* CHMOS N, S L3 C, E Low-Voltage, PCA, Prog. Clock-Out
Expanded RAM Family
**80C51RA ROMless 512 3 1 0 32 12,16,20,24 CHMOS N, P, S N/A C, E Expanded RAM, Prog. Clock-Out, H/W WDT
*83C51RA
87C51RA, ROM
8K ROM 512 3 1 0 32 12,16,20,24 CHMOS N, P, S L1 C, E Expanded RAM, Prog. Clock-Out, H/W WDT
**87C51RA 8K OTP 512 3 1 0 32 12,16,20,24 CHMOS N, P, S L3 C, E Expanded RAM, Prog. Clock-Out, H/W WDT
**83C51RB
87C51RB, ROM
16K ROM 512 3 1 0 32 12,16,20,24 CHMOS N, P, S L1 C, E Expanded RAM, Prog. Clock-Out, H/W WDT
**87C51RB 16K OTP 512 3 1 0 32 12,16,20,24 CHMOS N, P, S L3 C, E Expanded RAM, Prog. Clock-Out, H/W WDT
**83C51RC
87C51RC, ROM
32K ROM 512 3 1 0 32 12,16,20,24 CHMOS N, P, S L1 C, E Expanded RAM, Prog. Clock-Out, H/W WDT
**87C51RC 32K OTP 512 3 1 0 32 12,16,20,24 CHMOS N, P, S L3 C, E Expanded RAM, Prog. Clock-Out, H/W WDT
Application Specific Family
**83C51KB 4K ROM 128 1 0 0 32 6 CHMOS P N/A C Integrated resonator, Dedicated Scan IN/OUT Pins
80C51GB ROMless 256 3 1+SEP 8 48 12,16 CHMOS N1 N/A C, E 8-Channel 8-Bit A/D, 2 PCA, 6 I/O Ports
83C51GB
87C51GB, ROM
8K ROM 256 3 1+SEP 8 48 12,16 CHMOS N1 L1 C, E 8-Channel 8-Bit A/D, 2 PCA, 6 I/O Ports
87C51GB 8K OTP 256 3 1+SEP 8 48 12,16 CHMOS N1 L3 C, E 8-Channel 8-Bit A/D, 2 PCA, 6 I/O Ports
80C152JA ROMless 256 2 1 0 40 12,16.5 CHMOS P1, N1 N/A C, E Multi-Protocol Serial Communication, Power Save Modes
83C152JA 8K ROM 256 2 1 0 40 12,16.5 CHMOS P1, N1 No C, E Multi-Protocol Serial Communication, Power Save Modes
80C152JB ROMless 256 2 1 0 56 12,16.5 CHMOS N1 N/A C, E Multi-Protocol Serial Communication, Power Save Modes
80C152JC ROMless 256 2 1 0 40 12,16.5 CHMOS P1,N1 N/A C, E Multi-Protocol Serial Communication, Power Save Modes
83C152JC 8K ROM 256 2 1 0 40 12,16.5 CHMOS P1,N1 N/A C, E Multi-Protocol Serial Communication, Power Save Modes
80C152JD ROMless 256 2 1 0 56 12,16.5 CHMOS N1 N/A C, E Multi-Protocol Serial Communication, Power Save Modes
80C51SLAH ROMless 256 2 1 4 24 16 CHMOS Ku, Sb N/A C Keyboard Controller, Power Save Modes
81C51SLAH 16K *ROM 256 2 1 4 24 16 CHMOS Ku, Sb, X No C Keyboard Controller, Power Save Modes
83C51SLAH
87C51SLAH, ROM
16K ROM 256 2 1 4 24 16 CHMOS Ku, Sb No C Keyboard Controller, Power Save Modes
87C51SLAH 16K OTP 256 2 1 4 24 16 CHMOS Ku, Sb No C Keyboard Controller, Power Save Modes
80C51SLAL ROMless 256 2 1 4 24 16 CHMOS Sb N/A C Low-Voltage, 4 Channel 8-Bit A/D, Power Save Modes
81C51SLAL 16K *ROM 256 2 1 4 24 16 CHMOS Sb, X No C Low-Voltage, 4 Channel 8-Bit A/D, Power Save Modes
83C51SLAL
87C51SLAL, ROM
16K ROM 256 2 1 4 24 16 CHMOS Sb No C Low-Voltage, 4 Channel 8-Bit A/D, Power Save Modes
87C51SLAL 16K OTP 256 2 1 4 24 16 CHMOS Sb No C Low-Voltage, 4 Channel 8-Bit A/D, Power Save Modes

PACKAGE OPTIONS:

    D = 40LDCerDIP,
    Ku = 100LD QFP (Quad Flat Pack)
    N = 44LD PLCC N1 = 68LD PLCC
    P = 40LD PDIP P1 = 48LD PDIP
    S = 44LD QFP (Quad Flat Pack)
    Sb = 100LD SQFP (Shrink Quad Flat Pack)
    X = SmartDie™: Product
* Intel SmartDie™: Products are functionally equivalent die-level silicon versions of standard Intel products. All SmartDie Products are tested to meet commercial specifications to ensure the same quality and reliability levels of packaged products. SmartDie Products offer the user a cost-effective packaging alternative for those demanding small, form factor applications.
    ROM/EPROM (bytes):
    *ROM = SystemSoft Standard BIOSB

TEMPERATURE RANGES:

    C = Commercial (0 to 70 degrees C)
    E = Extended (-40 to 85 degrees C)
    A = Automotive (-40 to 125 degrees C). To receive more information on Intel's Automotive Products, call (800) 548-4725 and ask for document #272452-01, "The Winning Formula Automotive Brochure."
    M = Military (-55 to 125 degrees C) Intel 's Military and Special Products offer industrial-strength semiconductors optimized for wide temperature range and tough applications and environments. For a list of these products, call (800) 548-4725 and ask for document #271153 "Military and Special Products Portfolio."
    Speed (MHz):*= commercial temperature range only
    Security: L1 = 1 Lock Bit
    L2 = 2 Lock Bits
    L3 = 3 Lock Bits
    P = Protection

** = NEW PRODUCT

NOMENCLATURE:

    83C51xx/83L51xx = Mask Rom
    80C5x/80LSx = Mask Rom
    87C51xx,Rom/87L51xx,Rom = FPROM
    87C5x,Rom/87L5x,Rom = FPROM

    Where available, order Factory Programmed Rom (FPROM)

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