P87C51RB2BBD,157

Microcontrollers Overview

The P87C51RB2BBD,157 is an 8-bit microcontroller from the NXP P87C51 family, based on the 80C51 architecture. It features 16 KB of One-Time Programmable (OTP) memory and 512 bytes of RAM. The device operates at a maximum frequency of 33 MHz in 12-clock mode or 30 MHz in 6-clock mode, supporting a low voltage range of 2.7 V to 5.5 V. It is housed in a 44-pin LQFP package with an operating temperature range of 0°C to +70°C.

Microcontrollers Feature Summary

• Supports selectable 6-clock or 12-clock operation for optimized performance and power consumption.
• Includes a Programmable Counter Array (PCA) for PWM generation and capture/compare functions.
• Features three 16-bit timers/counters, including Timer 2 with capture and compare capabilities.
• Provides full-duplex enhanced UART with framing error detection and automatic address recognition.

Microcontrollers Applications

• Motor control systems requiring pulse width modulation and high-speed I/O
• Industrial applications needing up/down counting capabilities
• Embedded systems utilizing standard 80C51 instruction set compatibility

Microcontrollers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Confirm that the OTP memory variant matches the required application constraints. Ensure the component meets all environmental compliance standards relevant to the target deployment region before finalizing procurement.

Microcontrollers Selection Notes

Select this component when a derivative of the 80C51 family is required with 16 KB of program memory. It is suitable for designs needing low voltage operation between 2.7 V and 5.5 V. Consider the PCA module if hardware PWM or capture/compare functionality is necessary without additional external components.

Microcontrollers Part Context

This part belongs to the P87C51RA2/RB2/RC2/RD2 family, which offers scalable memory options ranging from 8 KB to 64 KB OTP. All variants share the same core architecture, peripheral sets, and pinouts, differing primarily in memory size and occasionally package availability. The RB2 specifically provides a mid-range memory capacity within this series.

Microcontrollers Replacement Considerations

Compatible substitutes include other members of the P87C51 family such as the P87C51RC2BBD or P87C51RD2BBD, provided the memory requirements are met. Verify that the replacement maintains the same LQFP-44 package and voltage specifications.