Part: PIC16F873A/874A/876A/877A — Microchip Type: Enhanced Flash Microcontroller Description: High-performance RISC microcontroller with up to 8K x 14 words Flash program memory, 368 x 8 bytes Data RAM, 256 x 8 bytes EEPROM, operating at DC - 20 MHz, featuring integrated peripherals like A/D converter, CCP modules, and serial communication interfaces.

Operating Conditions:

• Supply voltage: 2.0V to 5.5V
• Operating temperature: Commercial and Industrial ranges
• Operating speed: DC - 20 MHz clock input

Absolute Maximum Ratings:

Key Specs:

• Program Memory: Up to 8K x 14 words Flash
• Data Memory (RAM): Up to 368 x 8 bytes
• EEPROM Data Memory: Up to 256 x 8 bytes
• Instruction Set: 35 single-word instructions
• Instruction Cycle: DC - 200 ns
• A/D Converter: 10-bit, up to 8-channel
• Capture/Compare/PWM Modules: 2 (16-bit Capture, 16-bit Compare, 10-bit PWM)
• Data EEPROM Erase/Write Cycles: 1,000,000 typical
• Flash Program Memory Erase/Write Cycles: 100,000 typical

Features:

• Three 8-bit/16-bit Timers (Timer0, Timer1, Timer2)
• Synchronous Serial Port (SSP) with SPI (Master) and I2C (Master/Slave)
• Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI)
• Parallel Slave Port (PSP) (40/44-pin only)
• Brown-out detection circuitry for Brown-out Reset (BOR)
• In-Circuit Serial Programming (ICSP) and In-Circuit Debug (ICD)
• Watchdog Timer (WDT)
• Power saving Sleep mode

Applications:

Package:

• 28-pin PDIP
• 28-pin SOIC
• 28-pin SSOP
• 28-pin QFN
• 40-pin PDIP
• 44-pin PLCC
• 44-pin TQFP
• 44-pin QFN

• Timer0: 8-bit timer/counter with 8-bit prescaler
• Timer1: 16-bit timer/counter with prescaler, can be incremented during Sleep via external crystal/clock
• Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler
• Two Capture, Compare, PWM modules
• -Capture is 16-bit, max. resolution is 12.5 ns
• -Compare is 16-bit, max. resolution is 200 ns
• -PWM max. resolution is 10-bit
• Synchronous Serial Port (SSP) with SPI (Master mode) and I 2 C™ (Master/Slave)
• Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI) with 9-bit address detection
• Parallel Slave Port (PSP) - 8 bits wide with external RD, WR and CS controls (40/44-pin only)
• Brown-out detection circuitry for Brown-out Reset (BOR)

PIC16F877A Pinout

28-Pin PDIP/SOIC/SSOP

Notes

• Package: 28-pin PDIP, SOIC, or SSOP (all share identical pinout)
• Power pins: VSS (pins 8, 19) = Ground; VDD (pin 20) = +5V
• MCLR: Pin 1 requires pull-up resistor and decoupling capacitor; VPP used during in-circuit programming
• Oscillator: Pins 9–10 for external crystal or clock input
• Port A: 6 I/O pins with analog input capability (AN0–AN4) and voltage reference inputs
• Port B: 8 I/O pins; RB0 has external interrupt capability; RB3, RB6, RB7 used for ICSP programming
• Port C: 8 I/O pins with multiple peripheral functions (USART, SPI, I²C, Timer1, Comparators, CCP)
• Analog features: 5 analog input channels (AN0–AN4), 2 voltage reference pins (VREF+, VREF−), 2 comparator outputs (C1OUT, C2OUT)

PIC16LF873A/874A/876A/877A (Industrial)

Legend: Rows with standard voltage device data only are shaded for improved readability.

• † Data in 'Typ' column is at 5V, 25°C, unless otherwise stated. These parameters are for design guidance only and are not tested.

Note

• 1: This is the limit to which VDD can be lowered without losing RAM data.
• 2: The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O pin loading, switching rate, oscillator type, internal code execution pattern and temperature, also have an impact on the current consumption.

The test conditions for all IDD measurements in active operation mode are:

OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD; MCLR = VDD; WDT enabled/disabled as specified.

• 3: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured with the part in Sleep mode, with all I/O pins in high-impedance state and tied to VDD and VSS.
• 4: For RC osc configuration, current through REXT is not included. The current through the resistor can be estimated by the formula Ir = VDD/2REXT (mA) with REXT in k .
• 5: Timer1 oscillator (when enabled) adds approximately 20 A to the specification. This value is from characterization and is for design guidance only. This is not tested.
• 6: The current is the additional current consumed when this peripheral is enabled. This current should be added to the base IDD or IPD measurement.
• 7: When BOR is enabled, the device will operate correctly until the VBOR voltage trip point is reached.

Note 1: Power dissipation is calculated as follows: Pdis = VDD x {IDD - IOH} + {(VDD - VOH) x IOH} + (VOl x IOL)

2: Voltage spikes below VSS at the MCLR pin, inducing currents greater than 80 mA, may cause latch-up. Thus, a series resistor of 50-100 should be used when applying a 'low' level to the MCLR pin rather than pulling this pin directly to VSS.

• 3: PORTD and PORTE are not implemented on PIC16F873A/876A devices.

† NOTICE: Stresses above those listed under 'Absolute Maximum Ratings' may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

FIGURE 17-1: PIC16F87XA VOLTAGE-FREQUENCY GRAPH (INDUSTRIAL, EXTENDED)

FIGURE 17-2: PIC16LF87XA VOLTAGE-FREQUENCY GRAPH (INDUSTRIAL)