PIC16C77T-10I/PQ - 14KB OTP 8-bit MCU 10MHz | Microchip
MPN: PIC16C77T-10I/PQ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $12.8 | $128.00 |
| 100 | $11.2 | $1,120.00 |
| 500 | $9.85 | $4,925.00 |
| 1,000 | $8.9 | $8,900.00 |
PIC16C77T-10I/PQ Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, program memory, RAM, and configurable peripherals such as timers, communication ports, and analog-to-digital converters. The PIC family uses a Harvard RISC architecture, executing one instruction per clock cycle for deterministic real-time performance. The PIC16C7X sub-family adds on-chip 8-bit A/D conversion, placing these MCUs in the broader taxonomy: MCU -> 8-bit MCU -> RISC MCU -> PIC16CXX mid-range family.
Key features include 14 KB (8K x 14) OTP program memory, 368 bytes of data RAM, 33 I/O pins, an integrated 8-bit A/D converter with multiple channels, three timers, a synchronous serial port (SSP) supporting SPI and I2C, a USART, and a capture/compare/PWM module. The 44-pin MQFP (PQ) package supports industrial-grade -40C to +85C operation, indicated by the 'I' suffix, and 'T' denotes Tape and Reel packaging. The '10' designator identifies the 10 MHz maximum clock frequency variant.
Architecturally, the PIC16C77 uses a 14-bit instruction word with a hardware stack of 8 levels and an 8-level deep interrupt structure. The CMOS static design allows the clock to be slowed or stopped for low-power operation. The 'C' in PIC16C77 indicates OTP (one-time programmable) program memory, which is suitable for production runs where the firmware is finalized before manufacturing.
Typical applications include industrial control systems, instrumentation, motor control, sensor interfacing, and embedded consumer products where A/D conversion, communication peripherals, and ample I/O are required. Its integrated ADC and multiple peripherals suit process monitoring and small closed-loop control designs.
When designing with this device, plan for OTP programming - firmware must be verified on a windowed (JW) or flash equivalent before committing to OTP production. The Microchip PIC16F77 (flash-based) is the recommended migration path; according to the Microchip product page, PIC16F77 is a newer, flash-programmable alternative that offers identical pinout and peripherals.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for PIC16C77T-10I/PQ — 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 PIC16C77T-10I/PQ (same form factor and footprint) — differing in Package, Timers, Program Memory Size, A/D Converter, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C77-10I/PQ
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →PIC16F77-I/PQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C77-10/PQ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.8 / Unit
View Datasheet →PIC16C77-04I/PQ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$7.16 / Unit
View Datasheet →PIC16C77-20I/PQ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$7.96 / Unit
View Datasheet →PIC16C774T/PQ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$6.4 / Unit
View Datasheet →PIC16C77T-10I/PQ Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC16C7X (Mid-Range) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 14 KB (8K x 14) |
| Data RAM | 368 bytes |
| Maximum Clock Frequency | 10 MHz |
| Instruction Execution Time | 200 ns |
| Supply Voltage (Vdd) | 5 V (typical) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| I/O Pins | 33 |
| A/D Converter | 8-bit, integrated |
| Timers | 3 |
| Communication | USART, SSP (SPI / I2C) |
| Package | MQFP-44 (PQ) |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial |
| Terminal Form | Gull Wing |
PIC16C77T-10I/PQ Pin Configuration
| Pin 1 | OSC1/CLKIN — Oscillator input / external clock |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / ADC reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SSP slave select |
| Pin 8 | Vss — Ground |
| Pin 9 | OSC2/CLKOUT — Oscillator output / clock out |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin 18 | Vss — Ground |
| Pin 19 | Vdd — Positive supply (5 V) |
| Pin 20 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 21 | RB1 — PORTB bit 1 |
| Pin 22 | RB2 — PORTB bit 2 |
| Pin 23 | RB3 — PORTB bit 3 |
| Pin 24 | RB4 — PORTB bit 4 |
| Pin 25 | RB5 — PORTB bit 5 |
| Pin 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 28 | Vss — Ground |
| Pin 29 | VDD — Positive supply |
| Pin 30 | RD0 — PORTD bit 0 |
| Pin 31 | RD1 — PORTD bit 1 |
| Pin 32 | RD2 — PORTD bit 2 |
| Pin 33 | RD3 — PORTD bit 3 |
| Pin 34 | RD4 — PORTD bit 4 |
| Pin 35 | RD5 — PORTD bit 5 |
| Pin 36 | RD6 — PORTD bit 6 |
| Pin 37 | RD7 — PORTD bit 7 |
| Pin 38 | Vss — Ground |
| Pin 39 | VDD — Positive supply |
| Pin 40 | RE0/RD — PORTE bit 0 / read control |
| Pin 41 | RE1/WR — PORTE bit 1 / write control |
| Pin 42 | RE2/CS — PORTE bit 2 / chip select |
| Pin 43 | Vss — Ground |
| Pin 44 | MCLR/Vpp — Master clear / programming voltage |
Typical Applications
PIC16C77T-10I/PQ is suitable for 7 applications: Industrial Process Control, Sensor Interface Module, Small Motor Control, Embedded Instrumentation, HVAC Control Systems, Consumer Appliance Control, Security Keypad Panel.
Industrial Process Control
The PIC16C77T-10I/PQ is well-suited for industrial process monitoring loops where its integrated 8-bit ADC, USART, and industrial -40C to +85C temperature range align with sensor acquisition requirements. The 200 ns instruction execution supports sub-millisecond PID loop times for closed-loop control of pressure, flow, or temperature variables. The 33 I/O pins allow direct interfacing to HMI keypads, displays, and digital actuators without external logic. Its OTP memory keeps per-unit cost low once firmware is finalized for high-volume production.
Recommended
Sensor Interface Module
The 14 KB OTP program memory and 368-byte RAM accommodate small protocol stacks for SPI or I2C sensor hubs. The PIC16C77T-10I/PQ's SSP peripheral supports both SPI and I2C master/slave modes, allowing direct connection to digital accelerometers, pressure sensors, and EEPROM memory. The 33 I/O lines provide expansion for status LEDs, alarm relays, and digital outputs. The integrated 8-bit ADC converts analog channels from thermistors or transducers concurrently with digital I/O activity.
Recommended
Small Motor Control
The Capture/Compare/PWM (CCP) module of the PIC16C77T-10I/PQ enables direct PWM generation for brushed DC or small brushless motor control applications. The 10 MHz clock produces PWM frequencies up to 39 kHz with 8-bit resolution, sufficient for low-voltage motor drivers. The 33 I/O pins handle direction control, tachometer feedback, current sensing via the ADC, and fault inputs. The industrial temperature grade ensures operation in enclosures near motor heat sources.
Recommended
Embedded Instrumentation
Portable instrumentation benefits from the PIC16C77T-10I/PQ's static CMOS design that allows the clock to be slowed for low-power operation between measurement cycles. The integrated ADC, USART for serial data output, and ample I/O for button/display interfaces create a complete data-acquisition front end. The 14 KB OTP holds lookup tables for sensor linearization and calibration constants. Industrial temperature operation supports lab and field-deployed measurement equipment.
Recommended
HVAC Control Systems
HVAC zone controllers use the PIC16C77T-10I/PQ's combination of analog inputs (temperature, humidity), digital outputs (relay drivers, valve actuators), and serial communication (USART for BACnet or Modbus bridges). The -40C to +85C industrial temperature range covers unconditioned equipment rooms and rooftop enclosures. The 8-bit ADC provides adequate resolution for typical HVAC sensor signals after firmware-side filtering.
Recommended
Consumer Appliance Control
White goods and small appliances leverage the PIC16C77T-10I/PQ's 33 I/O pins to drive 7-segment displays, keypad matrices, indicator LEDs, and buzzer outputs without external latches. The OTP memory keeps per-unit cost low for high-volume consumer production. The integrated peripherals handle AC zero-cross detection, triac firing via interrupts, and serial EEPROM recall of user settings. The 200 ns instruction time keeps user-interface response snappy.
Recommended
Security Keypad Panel
The PIC16C77T-10I/PQ's 33 I/O lines easily scan a 4x4 matrix keypad while driving status LEDs, a piezo buzzer, and a relay or magnetic-lock driver. The USART interfaces to a centralized alarm panel for event reporting. The 14 KB OTP holds PIN database, event log, and anti-tamper logic. Industrial temperature operation is reliable for outdoor or semi-outdoor keypad installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C77T-10I/PQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C77-10I/PQ | PIC16F77-I/PQ | PIC16C77-10/PQ | PIC16C77-04I/PQ | PIC16C77-20I/PQ | PIC16C774T/PQ |
|---|---|---|---|---|---|---|---|
| Package | MQFP-44 (PQ) | MQFP-44 (PQ) | MQFP-44 (PQ) | MQFP-44 (PQ) | MQFP-44 (PQ) | MQFP-44 (PQ) | MQFP-44 (PQ) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP (14 KB) | OTP (14 KB) | Flash (14 KB) | OTP (14 KB) | OTP (14 KB) | OTP (14 KB) | OTP (14 KB) |
| Max Clock Frequency | 10 MHz | 10 MHz | 20 MHz | 10 MHz | 4 MHz | 20 MHz | 10 MHz |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Commercial (0 to +70C) | Industrial | Industrial | Industrial |
| Packaging Media | Tape & Reel | Tube | Tube / T&R | Tube | Tube | Tube | Tape & Reel |
| ADC Resolution | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 12-bit |
| Lifecycle Status | Obsolete | Obsolete | Active | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Industrial temperature grade availability in legacy OTP family (vs PIC16C77-10/PQ)
- Direct flash-based drop-in upgrade path (vs PIC16F77-I/PQ)
- Integrated 8-bit ADC with multiple channels (vs PIC16C774T/PQ)
Design Notes
OTP memory (One-Time Programmable) cannot be erased or rewritten. Per the Microchip product page, PIC16C77T-10I/PQ should only be programmed after firmware is fully validated using the flash-based PIC16F77 or windowed PIC16C77/JW. Programming bad firmware into OTP parts wastes inventory and incurs per-unit programming costs. Always run pre-production batches through engineering review.
The 44-pin MQFP (PQ) package has 0.8 mm pitch leads. Per the Microchip datasheet, the exposed die-paddle on the package bottom is not electrically connected - it does NOT need thermal soldering but should be soldered for mechanical integrity. Place a ground pour under the package to reduce EMI from the high-frequency oscillator. Keep analog inputs (RA0-RA5) routed away from digital lines to minimize ADC noise coupling.
PIC16C77T-10I/PQ operates from 5 V typical supply but supports the mid-range PIC family standard 2.5 V to 5.5 V wide voltage range. Decouple Vdd with a 100 nF ceramic capacitor placed within 5 mm of each Vdd pin (the device has multiple Vdd pins on pins 19, 29, 39). Add a 10 uF bulk capacitor near the package for switching transients. The MCLR pin requires a 10 kohm pull-up to Vdd for normal operation; in-circuit serial programming (ICSP) uses a low-voltage path.
The 10 MHz clock oscillator (pins OSC1/OSC2) generates harmonics that can couple into analog inputs. Route oscillator traces on the top layer over a continuous ground plane to contain RF emissions. Use a guard ring around the analog traces (RA0-RA5) tied to analog ground. The ADC conversion accuracy degrades if the source impedance exceeds 10 kohm; add a unity-gain buffer (e.g., MCP6001) for high-impedance sensors.
Compliance Information
PIC16C77T-10I/PQ predates RoHS transition dates; RoHS/REACH compliance status was not stated in the verified web data and is marked as unknown. For new designs requiring compliance, Microchip recommends the PIC16F77 family. AEC-Q100 qualification is not applicable for industrial/consumer MCU.
