PIC16C774T-E/L - 8-Bit 20MHz OTP MCU, 7KB EPROM | Microchip
MPN: PIC16C774T-E/L ⚠ Huling PagbiliPIC16C774T-E/L Ulas
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile RAM, and I/O peripherals. PIC microcontrollers use a Harvard architecture with separate program and data buses, and the mid-range PIC16 family employs a 14-bit instruction set known for code density and deterministic timing. Within the power management and embedded hierarchy, MCUs sit above logic ICs and below SoCs; they are the workhorses of appliance control, automotive subsystems, and industrial instrumentation.
Key features of this part include 7KB EPROM (4K x 14), 256 bytes of RAM, 33 I/O lines, a 20MHz maximum clock, and four 8-bit timer/counters plus one 16-bit timer/counter. A 10-bit multi-channel Analog-to-Digital Converter, USART, and PSP (Parallel Slave Port) are integrated, and the device supports both internal and external oscillator modes. The 44-pin PLCC gives ample analog and digital pin assignments for mixed-signal designs.
The architecture is a RISC design with only 35 single-word instructions, all single-cycle except program branches (two cycles). The Harvard bus allows simultaneous instruction fetch and data access, and the 8-level deep hardware stack supports nested subroutine calls typical of interrupt-driven firmware. The brown-out reset and power-on reset blocks protect volatile RAM and start firmware from a known state.
Typical applications include industrial automation controllers, HVAC control boards, automotive body electronics (when derated within the temperature grade), instrumentation front-ends, motor control driver boards, sensor signal conditioning, and consumer appliance control panels. The 20MHz clock and 7KB code space are well suited to control loops that combine analog sensing with PWM actuation and serial communication to a host MCU or HMI.
When designing with PIC16C774T-E/L, ensure decoupling capacitors (100nF and 10uF) are placed within a few millimeters of VDD/VSS pins, follow PLCC socket or solder-pad layout guidelines, and configure the MCLR pin with the proper pull-up. The OTP memory cannot be re-programmed in-circuit, so code should be fully verified before final write.
This page synthesizes distributor pricing, drop-in PLCC-44 alternatives from Microchip's PIC16C77x family, and practical design notes not found in the manufacturer datasheet alone.
Mga alternatibo na pwedeng ilagay na PIC16C774T-E/L — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC16C774T-E/L (parehas na form factor at footprint) — pagkakaiba sa Timers, Core Architecture, Package, Operating Temperature, Mounting Type.
PIC16C774T/L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16C774T/PQ
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16C774-I/L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16C774-I/P
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16C77-10I/L
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
PIC16C765-I/P
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16C77-20I/L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16C774T-E/L Mga Pinakamataas na Rating at Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (mid-range) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 256 x 8 bytes (256 B) |
| CPU Speed | 20 MHz |
| Instruction Execution Time | 200 ns |
| Instruction Set | 35 single-word instructions, 14-bit wide |
| Hardware Stack Depth | 8 levels |
| Number of I/O Pins | 33 |
| Packhaging / Kaso | 44-LCC (J-Lead), 16.59 x 16.59 mm |
| Supply Voltage (VDD) | 5 V nominal |
| Oscillator Type | External (XT, HS, LP, RC modes) |
| Operating Temperature Grade | Extended Industrial (-40C to +125C) |
| Uri ng Pagpapasok | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Communication | USART/SCI, PSP (per family datasheet) |
Pin Configuration ng PIC16C774T-E/L
| Pin 1 | MCLR/VPP — Master Clear (reset) input / Programming voltage |
| Pin 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 5 | RA3/AN3/VREF — Port A bit 3 / Analog input 3 / Voltage reference |
| Pin 6 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| Pin 7 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI slave select |
| Pin 8 | RE0/RD — Port E bit 0 / Parallel Slave Port read |
| Pin 9 | RE1/WR — Port E bit 1 / Parallel Slave Port write |
| Pin 10 | RE2/CS — Port E bit 2 / Parallel Slave Port chip select |
| Pin 11 | VDD — Positive supply (5V) |
| Pin 12 | VSS — Ground |
| Pin 13 | OSC1/CLKIN — Oscillator input / external clock |
| Pin 14 | OSC2/CLKOUT — Oscillator output / clock out |
| Pin 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / T1 clock |
| Pin 16 | RC1/T1OSI/CCP2 — Port C bit 1 / T1 oscillator in / CCP2 |
| Pin 17 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Pin 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| 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/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| Pin 26 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| 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 |
| Pin 32 | VDD — Positive supply (5V) |
| Pin 33 | RB0/INT — Port B bit 0 / External interrupt |
| Pin 34 | RB1 — Port B bit 1 |
| Pin 35 | RB2 — Port B bit 2 |
| Pin 36 | RB3/PGM — Port B bit 3 / Low-voltage programming |
| Pin 37 | RB4 — Port B bit 4 |
| Pin 38 | RB5 — Port B bit 5 |
| Pin 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Tipikal na mga Gamit
PIC16C774T-E/L ay nararapat para sa 7 aplikasyons: Industrial Automation Controllers, HVAC Control Boards, Automotive Body Electronics, Instrumentation Front-End, Motor Control Driver Boards, Consumer Appliance Control Panels, Sensor Signal Conditioning Hubs.
Industrial Automation Controllers
The PIC16C774T-E/L fits industrial PLC and automation controller boards thanks to its 20MHz CPU, 33 I/O pins, and Extended temperature grade (-40C to +125C). The 7KB OTP EPROM holds PID loops, sequence logic, and Modbus or RS-485 protocol stacks, while 256 bytes RAM covers queue buffers and runtime variables. Its 200ns deterministic instruction cycle enables jitter-free timing for high-speed encoder inputs and PWM-driven actuators.
Inirekomenda
HVAC Control Boards
In HVAC thermostats and variable-air-volume controllers, the PIC16C774T-E/L's 12-bit ADC (family typical), PWM outputs, and -40C to +125C operation handle sensor reading and triac-fired actuator control. The 33 I/O pins accommodate keypad inputs, LCD interfaces, and multiple temperature/humidity channels. Its deterministic 200ns instruction cycle maintains consistent sampling rates for closed-loop climate control.
Inirekomenda
Automotive Body Electronics
Within its Extended Industrial temperature range, the PIC16C774T-E/L supports automotive body modules such as lighting controllers, mirror adjusters, and seat controllers. Its 33 I/O and PWM peripherals drive LED arrays and DC motors, while the Capture/Compare module reads Hall-effect sensors for position feedback. Migrate to PIC16F877A for AEC-Q100 grade qualification on safety-relevant modules.
Inirekomenda
Instrumentation Front-End
Benchtop multimeters, signal generators, and data loggers can use the PIC16C774T-E/L to digitize analog sensors and drive character LCDs. Its USART ports support SCPI command interfaces to a host PC, and its 33 I/O handle keypad scanning, range relay control, and reference switching. The 200ns instruction cycle supports real-time RMS calculations on AC signals.
Inirekomenda
Motor Control Driver Boards
Stepper, brushless DC, and small DC brushed motor drivers benefit from the PIC16C774T-E/L's PWM, Capture/Compare, and quadrature encoder interface capability. The 20MHz CPU computes field-oriented control loops for small BLDCs, and 33 I/O drive gate drivers for MOSFET half-bridges. Use the Watchdog Timer and Brown-Out Reset for failsafe operation in motor stalls.
Inirekomenda
Consumer Appliance Control Panels
Washing machines, microwave ovens, and induction cooktops use the PIC16C774T-E/L for user interface and load management. Its 33 I/O drive 7-segment displays, touch keys, and buzzer alerts, while the USART talks to the inverter or sensor board. The Extended temperature grade handles the heat inside oven or motor enclosures, and the OTP memory secures firmware against external read-back.
Inirekomenda
Sensor Signal Conditioning Hubs
Multi-channel sensor hubs for environmental monitoring use the PIC16C774T-E/L to read thermocouples, RTDs, and 4-20mA loops. The integrated ADC (family typical) digitizes analog signals, while PWM drives excitation currents for RTD measurement. The USART/SCI ports push data to a host gateway over RS-485 or Modbus, and 256 bytes RAM buffers local telemetry.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC16C774T-E/L — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | PIC16C774T/L | PIC16C774T/PQ | PIC16C774-I/L | PIC16C765-I/P | PIC16C77-20I/L |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Size | 7 KB (4K x 14) OTP | 7 KB (4K x 14) OTP | 7 KB (4K x 14) OTP | 7 KB (4K x 14) OTP | 7 KB (4K x 14) OTP + USB SIE | 14 KB (8K x 14) EPROM |
| RAM Size | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 368 bytes |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Extended (-40C to +125C) | Extended (-40C to +125C) | Extended (-40C to +125C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Windowed/OTP EPROM |
| Special Features | Standard peripherals | Standard peripherals | Standard peripherals | Standard peripherals | USB 1.1 SIE added | More program memory (14 KB) |
Pangunahing mga Pagkakaiba
- Extended Industrial temperature grade (-40C to +125C) (kumpara saPIC16C774-I/L)
- Higher density OTP with same PIC16C mid-range core (kumpara saPIC16C773T-I/SO)
- Pin-compatible Flash migration to PIC16F877A (kumpara saPIC16C774-I/L (same family))
Talaan ng Disenyo
Estimated: place a 100nF ceramic decoupling capacitor within 5mm of each VDD/VSS pin pair (PLCC-44 has two VDD/VSS pin pairs at pins 11/12 and 31/32). Add a bulk 10uF tantalum or aluminum electrolytic at the board entry point. Power-on reset timing depends on the VDD rise time; ensure VDD reaches 4.0V within 100ms or the POR block may not initialize reliably.
In the PLCC-44 package, theta_JA is approximately 50 C/W (estimated; confirm with Microchip packaging datasheet). At -40C to +125C ambient operation, continuous 20MHz operation with most I/O pins switching can raise junction temperature 30-40C above ambient - derate output drive or reduce clock if used near the upper temperature extreme.
PLCC-44 sockets are available (machined-pin or standard IC sockets) which simplify prototyping and field replacement. Use a PLCC-44 SMT pad pattern with 1.27mm pitch and proper pad width to ensure reliable solder joints. Keep high-speed traces (crystal, MCLR) away from switching I/O lines to reduce EMI injection into the oscillator.
OTP memory cannot be erased; verify firmware in a windowed (JW) version on prototype boards before programming the OTP part. Ensure configuration bits are set correctly: watchdog timer, brown-out reset voltage, code protection, and oscillator mode. The MCLR pin must NOT be left unconnected - tie through a 10k-100k pull-up to VDD for reliable reset.
Impormasyon ng Pagsunod sa Kautusan
RoHS/lead-free status not stated in retrieved snippets. Many legacy Microchip PIC16C OTP parts in PLCC-44 are NOT RoHS compliant (lead-based termination). PIC16C774T-E/L is Last-Time-Buy - verify status with Microchip before specifying for new RoHS designs. AEC-Q100 qualification is not stated; for AEC-Q100 needs use PIC16F877A-I/L Flash variant.
