PIC16C77-10I/P - 8-Bit 10MHz OTP MCU 14KB | Microchip
MPN: PIC16C77-10I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.55 | $85.50 |
| 100 | $7.62 | $762.00 |
| 500 | $6.84 | $3,420.00 |
| 1,000 | $6.1 | $6,100.00 |
PIC16C77-10I/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data bus and a Harvard or modified-Harvard architecture, integrating CPU, RAM, non-volatile program memory, and peripherals on one die. Within the broader semiconductor hierarchy, an MCU sits under microcontrollers -> embedded processors -> digital ICs. The PIC16C7X family is part of Microchip's mid-range PIC16 architecture, the workhorse tier between baseline PIC10/12/16 devices and high-performance PIC18/dsPIC parts. OTP memory (one-time programmable) means the program memory is written once by a programmer and is not erasable in-circuit, making these parts cost-optimized for fixed-code production volumes.
Key specifications include a wide 2.5 V to 6.0 V operating voltage range, 25 mA source/sink current per I/O, low-power modes drawing as little as 1 uA typical standby at 3 V/32 kHz, 14-bit-wide instruction word, and only 35 single-word instructions to learn. The device executes nearly every instruction in a single 200 ns cycle except program branches which take two cycles, giving deterministic throughput that simplifies real-time control loops.
Typical applications include industrial control panels, motor drive signal conditioning, HVAC sensor interfaces, automotive body controllers (where the /P industrial grade suffices), security and access control panels, and white-goods appliance controllers. The integrated ADC eliminates external converter ICs for multi-channel analog monitoring; the USART plus SSP (SPI/I2C) covers most legacy sensor busses.
A critical design consideration is that PIC16C77 is OTP, not flash - firmware cannot be re-programmed in the field. Designs needing in-application updates should migrate to the PIC16F77 flash successor, which is pin-compatible. Always place 0.1 uF decoupling close to VDD and reserve a 10 kohm pull-up on MCLR for reliable reset.
This page synthesizes distributor pricing, datasheet spec sheets, drop-in PIC16F77 alternative, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16C77-10I/P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16C77-10I/P (same form factor and footprint) — differing in Core Architecture, Package, Timers, Operating Temperature, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F77-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F877A-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C77-10I/PT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.65 / Unit
View Datasheet →PIC16C77-04I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$6.05 / Unit
View Datasheet →PIC16C76-10I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C765-I/P
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC16C77-10I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 mid-range 8-bit RISC |
| Program Memory | 14 KB (8K x 14) OTP |
| RAM | 368 bytes |
| Instruction Set | 35 single-word instructions |
| Maximum Clock Frequency | 10 MHz |
| Instruction Cycle Time | 200 ns |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Digital I/O Pins | 33 |
| ADC Channels | 8 x 8-bit |
| Timers | 2 x 8-bit + 1 x 16-bit |
| CCP Modules | 2 (Capture/Compare/PWM) |
| Serial Interfaces | SSP (SPI/I2C) + USART |
| I/O Source/Sink Current | 25 mA / 25 mA |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 40-pin PDIP (DIP-40) |
| Mounting Type | Through-Hole |
| Standby Current | 1 uA typical @ 3 V, 32 kHz |
PIC16C77-10I/P Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 (analog AN0) |
| Pin 3 | RA1 — Port A bit 1 (analog AN1) |
| Pin 4 | RA2 — Port A bit 2 (analog AN2) |
| Pin 5 | RA3 — Port A bit 3 (analog AN3) |
| Pin 6 | RA4 — Port A bit 4 (analog AN4, open-drain) |
| Pin 7 | RA5 — Port A bit 5 (analog AN5) |
| Pin 8 | RE0 — Port E bit 0 (read strobe for parallel slave port) |
| Pin 9 | RE1 — Port E bit 1 (write strobe for parallel slave port) |
| Pin 10 | RE2 — Port E bit 2 (CS for parallel slave port) |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1 — Oscillator input or external clock input |
| Pin 14 | OSC2 — Oscillator output (crystal mode) |
| Pin 15 | RC0 — Port C bit 0 (T1OSO/T1CKI) |
| Pin 16 | RC1 — Port C bit 1 (T1OSI/CCP2) |
| Pin 17 | RC2 — Port C bit 2 (CCP1) |
| Pin 18 | RC3 — Port C bit 3 (SCK/SCL) |
| Pin 19 | RD0 — Port D bit 0 |
| Pin 20 | RD1 — Port D bit 1 |
| Pin 21 | RD2 — Port D bit 2 |
| Pin 22 | RD3 — Port D bit 3 |
| Pin 23 | RC4 — Port C bit 4 (SDI/SDA) |
| Pin 24 | RC5 — Port C bit 5 (SDO) |
| Pin 25 | RC6 — Port C bit 6 (TX/CK) |
| Pin 26 | RC7 — Port C bit 7 (RX/DT) |
| Pin 27 | RD4 — Port D bit 4 |
| Pin 28 | RD5 — Port D bit 5 |
| Pin 29 | RD6 — Port D bit 6 |
| Pin 30 | RD7 — Port D bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0 — Port B bit 0 (external interrupt) |
| Pin 34 | RB1 — Port B bit 1 |
| Pin 35 | RB2 — Port B bit 2 |
| Pin 36 | RB3 — Port B bit 3 |
| Pin 37 | RB4 — Port B bit 4 (interrupt-on-change) |
| Pin 38 | RB5 — Port B bit 5 (interrupt-on-change) |
| Pin 39 | RB6 — Port B bit 6 (interrupt-on-change, in-circuit programming clock) |
| Pin 40 | RB7 — Port B bit 7 (interrupt-on-change, in-circuit programming data) |
Typical Applications
PIC16C77-10I/P is suitable for 7 applications: Industrial Control Panels, HVAC Sensor Interface, White-Goods Appliance Controller, Security and Access Control Panels, Motor Drive Signal Conditioning, Automotive Body Controller (Cabin Grade), Test Equipment Front Panel.
Industrial Control Panels
The PIC16C77-10I/P fits industrial control panel designs because it integrates 8 channels of 8-bit ADC for direct sensor monitoring (temperature, pressure, flow) and provides 33 digital I/O for relay, switch, and indicator driving at 25 mA sink/source. Its 2.5 V to 6.0 V supply range accepts both 5 V logic and battery-backed 3.3 V rails commonly found in panel backplanes. The 10 MHz instruction rate yields 200 ns deterministic loop time, ideal for PID loops and scan-based HMI updates. The industrial -40 C to +85 C temperature grade ensures operation in cabinet enclosures near motors or heaters. OTP memory is acceptable for locked firmware. Compared with discrete logic + ADC, the integrated solution reduces PCB area by roughly 60 percent.
Recommended
HVAC Sensor Interface
For HVAC sensor interface boards, the PIC16C77-10I/P's 8-channel 8-bit ADC handles multiple thermistor, humidity, and pressure transducer inputs without external multiplexer ICs. The 2 CCP modules generate PWM outputs for damper and valve actuators, while the USART interfaces to remote display modules or building automation networks. Low-power modes (1 uA typical standby at 3 V/32 kHz) suit battery-backed thermostat nodes that must survive power outages. The 40-pin PDIP package simplifies hand-soldered prototype rework. Its 2.5 V to 6.0 V input range accommodates 3.3 V sensor rails and 5 V actuator supplies from a single IC.
Recommended
White-Goods Appliance Controller
Washing machines, dishwashers, and ovens benefit from the PIC16C77-10I/P because its 33 I/O lines drive seven-segment displays, keypad matrices, buzzer, and triac-controlled heater/valve outputs without external logic. The 16-bit timer/counter enables precise motor speed measurement via Hall-effect sensor inputs, while the CCP modules generate zero-crossing triac triggers for AC load dimming. OTP memory locks firmware at production volume, reducing per-unit cost by roughly 30 percent versus flash equivalents. Industrial temperature range covers under-counter appliance environments. PIC16C7X mid-range instruction set (35 single-word instructions) keeps firmware development time short.
Recommended
Security and Access Control Panels
Security alarm panels and access controllers leverage the PIC16C77-10I/P's 8-bit ADC for analog zone monitoring (smoke detectors, glass-break sensors) and its 33 I/O for keypad scanning, relay outputs, and LED drivers. The SSP port configured as I2C talks to EEPROM (for event log storage) and to RTC chips, while the USART connects to central monitoring stations via dial-up or cellular modems. OTP memory prevents firmware tampering - a security advantage. Industrial temperature range supports outdoor-rated enclosures. The 200 ns deterministic interrupt latency ensures sub-millisecond response to alarm triggers. The 40-pin PDIP is also friendly to field replacement in legacy installations.
Recommended
Motor Drive Signal Conditioning
Small DC and stepper motor controllers use the PIC16C77-10I/P for low-side PWM generation, current sensing via the 8-channel ADC, and encoder feedback through the 16-bit timer capture input. The 25 mA I/O sink/source capability directly drives opto-isolated gate drivers in low-power stages up to a few hundred watts. OTP memory locks validated motor control parameters, eliminating firmware drift in field-deployed equipment. Industrial temperature rating supports motor cabinet installations. Pin-compatible migration to PIC16F877A-I/P is straightforward when firmware tuning is needed.
Recommended
Automotive Body Controller (Cabin Grade)
Body electronics such as interior lighting controllers, seat-position memories, and accessory modules leverage the PIC16C77-10I/P's 33 I/O lines to drive multi-channel LED arrays and read switch matrices. The 8-channel ADC monitors battery voltage, ambient light sensors, and potentiometer inputs for trim controls. The industrial -40 C to +85 C temperature range suits cabin and cargo-area installations (NOT under-hood, where AEC-Q100 is required). OTP memory prevents unauthorized firmware modifications. The 40-pin PDIP is ideal for service-friendly automotive aftermarket modules where hand replacement matters. SPI/USART peripherals connect to instrument cluster or body control networks.
Recommended
Test Equipment Front Panel
Bench-top test instruments and lab data acquisition front panels benefit from the PIC16C77-10I/P's 8-channel ADC for analog measurement channels plus 33 I/O for switch matrix, rotary encoder inputs, and 7-segment or LCD display driving. The USART interfaces to host PCs for data logging, while the SSP port (SPI) talks to external DAC or precision reference chips. 200 ns instruction cycle provides deterministic scan rates up to 5 MHz for repetitive measurements. OTP memory protects calibration data integrity in calibrated instruments. Industrial temperature range ensures operation in laboratory and factory environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C77-10I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F77-I/P | PIC16F877A-I/P | PIC16C77-10I/PT | PIC16C77-04I/P | PIC16C76-10I/P | PIC16C765-I/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Program Memory Type | 14 KB OTP | 14 KB Flash | 14 KB Flash + 256 B EEPROM | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB OTP |
| Maximum Clock Frequency | 10 MHz | 10 MHz | 20 MHz | 10 MHz | 4 MHz | 10 MHz | 10 MHz |
| RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes |
| ADC Channels | 8 x 8-bit | 8 x 8-bit | 8 x 10-bit | 8 x 8-bit | 8 x 8-bit | 5 x 8-bit | 8 x 8-bit |
| Digital I/O | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| USB Peripheral | No | No | No | No | No | No | Yes (USB 1.1 SIE) |
Key Differentiators
- OTP memory for tamper-proof fixed firmware (vs PIC16F77-I/P)
- Lowest unit cost in PIC16C7X family (vs PIC16F877A-I/P)
- USB-capable sibling available in same footprint (vs PIC16C765-I/P)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD/AVDD pin (pins 11 and 32 for VDD, plus any AVSS/AVDD pair on the analog pins). Add a bulk 10 uF electrolytic or tantalum at the board supply entry. The PIC16C77-10I/P can operate from 2.5 V to 6.0 V; below 4.5 V the ADC accuracy degrades and brown-out detection should be enabled via the configuration bits to avoid code corruption during supply dips.
The 40-pin PDIP has a standard 0.100 inch (2.54 mm) pin pitch. Reserve a 4-pin ICSP header (MCLR, VDD, VSS, RB6/PGC, RB7/PGD) at the board edge for in-circuit serial programming - this allows firmware updates without removing the chip, useful during development and for service-bench reflashing. Keep analog traces (RA0-RA5) short and away from digital switching signals; route the analog VDD/VSS pair separately from digital supply.
Do not connect MCLR directly to VDD without a pull-up resistor - the PIC16C77 requires a rising edge on MCLR for normal operation. Use 10 kohm pull-up to VDD and a 100 nF cap to ground for manual reset button filtering. The PORTB pull-ups are software-enabled via the RBPU bit and must be turned on for switch-matrix inputs. OTP memory cannot be erased - use a UV-windowed CERDIP package (JW suffix) only for development, not production. Always set the configuration bits (oscillator, watchdog, brown-out, code protect) before programming the device.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C, NOT AEC-Q100 qualified for automotive under-hood use. Lead-free reflow compatible per JEDEC J-STD-020.
