PIC16C64AT-04E/PQ - 8-Bit 4MHz OTP MCU 3.5KB Flash | Microchip
料号： PIC16C64AT-04E/PQ ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.95 | $89.50 |
| 100 | $8.2 | $820.00 |
| 500 | $7.45 | $3,725.00 |
| 1,000 | $6.8 | $6,800.00 |
PIC16C64AT-04E/PQ 概述
What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a non-volatile programmable logic device whose on-chip program memory can be written only once after manufacture, typically using an EPROM cell. Once programmed, the firmware is permanent and cannot be erased or rewritten. OTP microcontrollers sit within the broader hierarchy of microcontrollers -> embedded microcontrollers -> 8-bit microcontrollers -> programmable logic devices -> semiconductors. They are commonly used in cost-sensitive, high-volume products where the firmware is finalized before production runs and the lowest unit cost is mandatory.
Key differentiating specifications of the PIC16C64AT-04E/PQ include its 4 MHz maximum operating frequency, 35 single-word RISC instructions, 8-bit architecture with Harvard memory organization, two 8-bit timers plus one 16-bit timer, a 10-bit ADC with up to 8 channels, synchronous serial port (SSP) for SPI/I2C communication, and 33 digital I/O lines supporting direct LED drive. The PIC16C64A core implements a 14-bit instruction word with an 8-bit data path and a hardware stack depth of 8 levels, which is typical of the mid-range PIC16 family.
Architecturally, the PIC16C64A family uses a RISC pipelined Harvard architecture that achieves near single-cycle instruction execution except for program branches, which are two-cycle. The OTP program memory stores the application firmware in 2K words of 14-bit width, while 128 bytes of general-purpose RAM support data and stack use. Integrated brown-out reset, power-on reset, watchdog timer, and an analog comparator make the device self-sufficient for many embedded designs without external supervisory ICs.
Typical applications for the PIC16C64AT-04E/PQ include industrial control systems, appliance controllers, automotive body electronics (with appropriate qualification), low-cost sensor interfaces, LED display drivers, and any high-volume consumer product where OTP programming economics favor one-time code storage over flash-based reprogrammability. Designers often choose this part for legacy designs originally specified around the PIC16C64A family and need a known pin-compatible MCU for production continuity.
A key design consideration when selecting the PIC16C64AT-04E/PQ is the OTP memory constraint: firmware bugs cannot be patched in the field, so code must be fully validated before programming. Developers should use the JW (windowed) or flash-based equivalent (e.g. PIC16F877A) variants for prototyping, then transition to the OTP or QTP parts for production. The extended (-40C to +125C) temperature range suits automotive underhood and industrial environments.
This page synthesizes distributor stock data, parametric cross-references, drop-in alternatives from the same PIC16C64A family, and practical design guidance not aggregated in any single source.
直接替换替代料： PIC16C64AT-04E/PQ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16C64AT-04E/PQ （相同外形与封装尺寸） ——差异在于 Operating Temperature Range, Timers, Package, Core Architecture, Program Memory Size.
快速对比工具——选择替代料号进行并排对比：
PIC16C64AT-04/PQ
✅ 直接替换✓ 有现货
$7.1 / 个
查看数据手册 →PIC16C64AT-04E/L
✅ 直接替换✓ 有现货
$6.1 / 个
查看数据手册 →PIC16C64AT-04/PT
✅ 直接替换✓ 有现货
$11.4 / 个
查看数据手册 →PIC16C64A-20I/PQ
✅ 直接替换✓ 有现货
$12.2 / 个
查看数据手册 →PIC16C64A-20I/P
✅ 直接替换✓ 有现货
$6.65 / 个
查看数据手册 →PIC16C64A-04/PQ
✅ 直接替换✓ 有现货
$4.3 / 个
查看数据手册 →PIC16C64AT-04E/PQ 最大额定值与电气特性
| Core Architecture | PIC16C 8-bit RISC (Harvard) |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 bytes (128 x 8) |
| Number of I/O Pins | 33 |
| Maximum Clock Speed | 4 MHz |
| 工作电源电压 | 5 V |
| 封装 / 外壳 | 44-MQFP (10x10 mm) |
| Oscillator Type | External |
| 数据总线宽度 | 8 bit |
| Instruction Set | 35 single-word instructions |
| ADC | 8 channels, 8-bit resolution |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Communication Interfaces | SSP (SPI / I2C), USART |
| 工作温度范围 | -40C to +125C (Extended, "E") |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
PIC16C64AT-04E/PQ 引脚配置
| 引脚 1 | OSC1/CLKIN — Oscillator crystal input or external clock input |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| 引脚 4 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| 引脚 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input channel 3 / ADC voltage reference |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer 0 clock input |
| 引脚 7 | RA5/SS/AN4 — PORTA bit 5 / SSP slave select / Analog input channel 4 |
| 引脚 8 | VSS — Ground reference |
| 引脚 9 | OSC2/CLKOUT — Oscillator crystal output or clock output |
| 引脚 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| 引脚 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer 1 oscillator input / CCP2 capture/compare/PWM |
| 引脚 12 | RC2/CCP1 — PORTC bit 2 / CCP1 capture/compare/PWM |
| 引脚 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 16 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| 引脚 17 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| 引脚 18 | VSS — Ground reference |
| 引脚 19 | VDD — Positive supply voltage (+5V) |
| 引脚 20 | RB0/INT — PORTB bit 0 / External interrupt input |
| 引脚 21 | RB1 — PORTB bit 1 |
| 引脚 22 | RB2 — PORTB bit 2 |
| 引脚 23 | RB3 — PORTB bit 3 |
| 引脚 24 | RB4 — PORTB bit 4 |
| 引脚 25 | RB5 — PORTB bit 5 |
| 引脚 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| 引脚 28 | VSS — Ground reference |
| 引脚 29 | VDD — Positive supply voltage (+5V) |
| 引脚 30 | RD0 — PORTD bit 0 |
| 引脚 31 | RD1 — PORTD bit 1 |
| 引脚 32 | RD2 — PORTD bit 2 |
| 引脚 33 | RD3 — PORTD bit 3 |
| 引脚 34 | RD4 — PORTD bit 4 |
| 引脚 35 | RD5 — PORTD bit 5 |
| 引脚 36 | RD6 — PORTD bit 6 |
| 引脚 37 | RD7 — PORTD bit 7 |
| 引脚 38 | VSS — Ground reference |
| 引脚 39 | VDD — Positive supply voltage (+5V) |
| 引脚 40 | RE0/RD — PORTE bit 0 / Parallel slave port read control |
| 引脚 41 | RE1/WR — PORTE bit 1 / Parallel slave port write control |
| 引脚 42 | RE2/CS — PORTE bit 2 / Parallel slave port chip select |
| 引脚 43 | VSS — Ground reference |
| 引脚 44 | MCLR/VPP — Master clear reset input / Programming voltage input |
典型应用
PIC16C64AT-04E/PQ 适用于 6 应用s: Industrial Control Systems, Appliance Controllers, Automotive Body Electronics (Legacy), Sensor Interface Modules, LED Display Drivers, Consumer Electronics Sub-systems.
Industrial Control Systems
The PIC16C64AT-04E/PQ fits industrial control applications because its 33 digital I/O lines directly drive relays, solenoids, and indicator LEDs without external buffers, while the integrated 8-channel 8-bit ADC reads sensor signals (temperature, pressure, level) without an external analog front end. With 3.5KB OTP program memory and 4 MHz operation, the device executes scan loops well under 1 ms, satisfying typical PLC response budgets. The extended -40C to +125C temperature range supports factory-floor enclosures, and the on-chip USART plus SSP (SPI/I2C) connect to HMI panels and remote I/O expanders. Designers favor this part for high-volume machinery controllers where the OTP economics outperform flash reprogrammability.
推荐
Appliance Controllers
The PIC16C64AT-04E/PQ is well suited to white-goods and small appliance controllers (washing machines, dishwashers, microwave ovens) where its 33 I/O drive motor triacs, valve solenoids, keypad switches, and seven-segment displays directly. The 3.5KB OTP memory holds motor-state firmware, while the 128-byte RAM supports timing variables and user-mode flags. The on-chip 16-bit timer captures zero-crossing events for triac phase-angle control, and the analog comparator monitors line voltage for brown-out protection. With OTP at production cost below flash parts, manufacturers can ship millions of units at sub-dollar MCU cost without firmware upgrade requirements typical of consumer appliances.
推荐
Automotive Body Electronics (Legacy)
For non-safety automotive body electronics (interior lighting, seat controllers, mirror adjusters), the PIC16C64AT-04E/PQ provides the 33 I/O count and 4 MHz throughput required for module coordination while its extended -40C to +125C temperature range covers cabin and underhood-adjacent locations. Designers integrate the SSP (SPI) to communicate with body control modules and use the USART for LIN-bus side-channel signaling. Note that the part is NOT AEC-Q100 qualified, so it cannot be used in safety-critical or powertrain applications. Engineers maintaining existing designs should validate component-level PPAP documentation before reuse, or migrate to AEC-Q100-qualified PIC16F family successors for new programs.
推荐
Sensor Interface Modules
The PIC16C64AT-04E/PQ acts as a low-cost sensor interface in distributed measurement systems, leveraging its 8-channel 8-bit ADC to digitize multiple analog sensors (thermistors, photocells, strain gauges) sequentially. The integrated USART streams readings over a half-duplex RS-485 link to a host controller, while the SSP (I2C) interfaces to digital temperature sensors and EEPROMs. With 128 bytes of RAM, the device buffers sample sets before transmission, and the watchdog timer resets the MCU on bus-lockup faults. The OTP memory economics suit OEM-volume environmental and process-sensor modules where firmware is locked at production.
推荐
LED Display Drivers
Driving multiplexed LED matrices and seven-segment displays is a natural fit for the PIC16C64AT-04E/PQ because its 33 I/O pins can directly sink or source LED segment currents up to 25 mA per pin, eliminating external transistor arrays for small displays. The 16-bit timer generates precise multiplex refresh rates without CPU overhead, and the 4 MHz instruction cycle supports 8-digit scanning at >100 Hz flicker-free rates. The 3.5KB OTP holds lookup tables for character fonts and brightness curves. For production signage and numeric-indicator products, OTP's per-unit cost advantage makes this PIC a long-running industry workhorse.
推荐
Consumer Electronics Sub-systems
In high-volume consumer electronics (remote controls, toys, small home appliances), the PIC16C64AT-04E/PQ provides the right balance of cost, capability, and legacy ecosystem. Its 4 MHz performance handles IR protocol encoding/decoding, keypad scanning, and simple audio tone generation, while the 33 I/O drive LCD segments or LED indicators directly. The OTP memory model suits toy and disposable consumer products where firmware is fixed at production and field updates are unnecessary. With extended -40C to +125C temperature range, devices survive shipping containers, attic storage, and outdoor use. Decades of Microchip PIC toolchain maturity (MPLAB, MPASM) lower engineering NRE.
推荐
推荐产品汇总
工程参考数据： PIC16C64AT-04E/PQ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16C64AT-04/PQ | PIC16C64A-04/PQ | PIC16C64A-20I/PQ | PIC16C64A-04I/PQ |
|---|---|---|---|---|---|
| Package | 44-MQFP (PQ) | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Number of I/O | 33 | 33 | 33 | 33 | 33 |
| Temperature Range | -40C to +125C (Extended) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Packaging Format | Tape & Reel (TR) | Tube | Tube | Tube | Tube |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
关键差异点
- Extended temperature grade with tape-and-reel format （对比 PIC16C64AT-04/PQ)
- Five times faster clock option available （对比 PIC16C64A-04I/PQ)
- Same package footprint across the entire PIC16C64A family （对比 PIC16C642-04I/SO)
设计说明
OTP memory cannot be reprogrammed: validate the entire firmware on a windowed (JW) or flash-based PIC16F877A equivalent before committing production code. Once a PIC16C64AT-04E/PQ is programmed, firmware bugs cannot be patched and the device must be discarded. Establish a controlled firmware-build process with golden-image verification to prevent production scrap.
Place the 44-MQFP decoupling directly across the VDD/VSS pairs (pins 19/18, 29/28, 39/38) with 100 nF X7R ceramic capacitors within 5 mm of each pair, plus a single 10 uF tantalum or aluminum polymer bulk capacitor at the package entry. Route the MCLR/VPP line with a 10 kohm pull-up to VDD and add a 100 nF capacitor to ground for noise immunity. Keep the OSC1/OSC2 traces short and symmetric; use a guard ground around the crystal to reduce EMI coupling into the ADC analog inputs.
The PIC16C64AT-04E/PQ draws low supply current (typically under 25 mA active at 4 MHz, microamps in sleep) and produces minimal self-heating even at the extended 125C junction limit. Standard MQFP-44 thermal resistance theta_JA is approximately 50-60 C/W on a 4-layer JEDEC test board, which is more than adequate. Estimated: at 5V VDD and 20 mA active ICC, internal dissipation is approximately 0.10 W, well within the thermal envelope for the 44-MQFP package even without a dedicated thermal copper pour.
Use the PIC16C64A built-in brown-out reset (BOR) and power-on reset (POR) to ensure deterministic startup; configure BOR voltage via configuration bits for 4.5V or 4.0V thresholds. Place the MCU in sleep mode with the watchdog timer enabled for battery-backed sensor applications; wake on watchdog timeout or external interrupt (RB0/INT). Estimated: in sleep mode the device typically draws under 1 uA at 5V, enabling multi-year battery life on a 200 mAh coin cell.
合规信息
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status not specified in the verified web data; consult Microchip product compliance documentation for definitive certification data. The PIC16C64AT-04E/PQ is NOT AEC-Q100 qualified and is not recommended for new automotive designs.
