PIC16C64AT-04E/PT - 8-Bit OTP MCU, 3.5KB, 4MHz, 44-TQFP
MPN： PIC16C64AT-04E/PT ✓ 啟用中PIC16C64AT-04E/PT 概覽
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and peripheral interfaces. The PIC16C family belongs to the broader 8-bit MCU category, sitting within the embedded controller taxonomy: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor IC. The RISC Harvard architecture separates program and data buses, enabling single-cycle instruction execution except for branches, and the OTP program memory allows one-time factory or in-circuit programming using standard PIC development tools.
Key features include 4MHz maximum clock, 33 I/O pins multiplexed across multiple peripheral functions, an external oscillator interface for crystal or resonator-based clocks, and CMOS technology for low power consumption. The wide 33-pin GPIO count, combined with on-chip peripherals, eliminates the need for external logic in many embedded designs. The 44-TQFP package offers a low-profile surface-mount footprint approximately 10x10mm, suitable for production assemblies with automated pick-and-place tooling.
Typical applications include industrial control systems, automotive body electronics, consumer appliances, and general-purpose embedded control boards. The 4MHz speed and 3.5KB OTP memory suit cost-sensitive, fixed-function products where firmware is finalized at production time. The 33 I/O lines enable direct interfacing of keypads, displays, sensors, and actuators without external expanders.
When designing with this device, verify that OTP programming timing and tooling match the production schedule, since OTP cannot be reprogrammed or field-updated. Plan firmware revision strategy carefully, as field bugs require physical part replacement. Adequate decoupling (100nF + 10uF) near VDD is required, and unused I/O should be configured as outputs low to minimize current draw.
This page synthesizes distributor pricing, drop-in alternatives sourced from Microchip's PIC16C64A family, comparison data, and practical design notes that go beyond the manufacturer datasheet to support sourcing and engineering decisions.
直接替換替代品，適用於 PIC16C64AT-04E/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C64AT-04E/PT （相同外形與佔位） — 差異在於 Operating Temperature Range, RoHS Status, Package, Program Memory Size, RAM Size.
PIC16C64AT-04/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-04E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-10E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-20E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-10I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64AT-04E/PT 最大額定值與電氣特性
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Program Memory Size | 3.5KB (2K x 14) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 128 x 8 bytes |
| Number of I/O | 33 |
| 最大時脈頻率 | 4 MHz |
| Oscillator Type | External |
| 工作溫度 | -40C to +125C (industrial 'E' suffix) |
| 封裝 / 外殼 | 44-TQFP |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Peripherals | Synchronous Serial Port (SSP), Timers, CCP |
| RoHS 狀態 | Compliant |
PIC16C64AT-04E/PT 腳位配置
| 腳位 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| 腳位 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| 腳位 3 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| 腳位 4 | RA3/AN3/VREF — Port A bit 3 / Analog input 3 / VREF |
| 腳位 5 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| 腳位 6 | RA5/SS/AN4 — Port A bit 5 / Slave Select / Analog input 4 |
| 腳位 7 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| 腳位 8 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| 腳位 9 | MCLR/VPP — Master clear reset / programming voltage |
| 腳位 10 | VSS — Ground reference |
| 腳位 11 | VDD — Positive supply voltage |
| 腳位 12 | RB0/INT — Port B bit 0 / External interrupt |
| 腳位 13 | RB1 — Port B bit 1 |
| 腳位 14 | RB2 — Port B bit 2 |
| 腳位 15 | RB3 — Port B bit 3 |
| 腳位 16 | RB4 — Port B bit 4 |
| 腳位 17 | RB5 — Port B bit 5 |
| 腳位 18 | RB6/PGC — Port B bit 6 / ICSP clock |
| 腳位 19 | RB7/PGD — Port B bit 7 / ICSP data |
| 腳位 20 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator out / clock in |
| 腳位 21 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 osc in / CCP2 |
| 腳位 22 | RC2/CCP1 — Port C bit 2 / CCP1 PWM output |
| 腳位 23 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| 腳位 24 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| 腳位 25 | RC5/SDO — Port C bit 5 / SPI data out |
| 腳位 26 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| 腳位 27 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| 腳位 28 | RD0 — Port D bit 0 |
| 腳位 29 | RD1 — Port D bit 1 |
| 腳位 30 | RD2 — Port D bit 2 |
| 腳位 31 | RD3 — Port D bit 3 |
| 腳位 32 | RD4 — Port D bit 4 |
| 腳位 33 | RD5 — Port D bit 5 |
| 腳位 34 | RD6 — Port D bit 6 |
| 腳位 35 | RD7 — Port D bit 7 |
| 腳位 36 | RE0/RD — Port E bit 0 / Read control |
| 腳位 37 | RE1/WR — Port E bit 1 / Write control |
| 腳位 38 | RE2/CS — Port E bit 2 / Chip select |
| 腳位 39 | VSS — Ground reference |
| 腳位 40 | VDD — Positive supply voltage |
| 腳位 41 | NC — Not connected |
| 腳位 42 | NC — Not connected |
| 腳位 43 | NC — Not connected |
| 腳位 44 | NC — Not connected |
典型應用
PIC16C64AT-04E/PT 適用於 6 應用s: Industrial Control Systems, Automotive Body Electronics, Consumer Appliance Control, HVAC Control Boards, Security and Access Control Panels, Point-of-Sale and Vending Peripherals.
Industrial Control Systems
The PIC16C64AT-04E/PT fits industrial control applications requiring deterministic real-time response from its 4MHz RISC core executing single-cycle instructions. The 33 I/O pins can directly drive keypads, seven-segment displays, relays, and sensor interfaces without external expanders, while the SSP peripheral supports SPI or I2C communication to digital sensors and EEPROM. OTP memory locks firmware at production, preventing field tampering in factory automation equipment. The extended -40C to +125C temperature range handles unheated enclosures near motors or in outdoor cabinets. Engineers typically pair the MCU with optocouplers for mains-isolated interfaces and use the CCP module for PWM-based motor speed control.
推薦
Automotive Body Electronics
The PIC16C64AT-04E/PT is used in non-safety automotive body modules such as window controllers, mirror adjusters, and interior lighting controls where AEC-Q100 is not mandated. Its 4MHz RISC throughput handles multiplexing of switch inputs and PWM drive of motors or LED arrays, while 33 I/O lines connect to body-domain sensors and actuators. The wide -40C to +125C temperature range survives under-dash thermal stress. Note that this part is NOT AEC-Q100 qualified, so for safety-critical ADAS or airbag systems engineers must select AEC-Q100 qualified PIC16F variants. The SSP peripheral interfaces with body-domain LIN transceivers via SPI bridges.
推薦
Consumer Appliance Control
Consumer appliances including washing machines, microwave ovens, and air conditioners use the PIC16C64AT-04E/PT as a cost-optimized control MCU. The 3.5KB OTP stores fixed control algorithms finalized at production, while 128 bytes RAM handles real-time state variables for user interface and sensor processing. The 33 I/O lines drive LED/LCD displays, keypad matrices, triac-based AC loads, and temperature sensors. The extended industrial temperature range tolerates the heat of compressor compartments and unventilated enclosures. OTP pricing is typically lower than equivalent Flash parts, reducing BOM cost for high-volume appliance production.
推薦
HVAC Control Boards
HVAC control boards use the PIC16C64AT-04E/PT for thermostat logic, blower motor PWM control, and multi-zone damper actuation. The CCP modules generate PWM signals for variable-speed blower drives, while 33 I/O lines interface with NTC temperature sensors, mode switches, and triac-fired compressor contactors. The RISC core's deterministic single-cycle execution ensures accurate timing for defrost cycles and compressor short-cycle protection. The extended -40C to +125C temperature range handles rooftop unit environments with direct solar loading. OTP memory secures the control algorithm against field modification, important for warranty and regulatory compliance.
推薦
Security and Access Control Panels
The PIC16C64AT-04E/PT is deployed in keypad entry systems, alarm control panels, and access controllers where fixed-firmware reliability and tamper resistance are valued. The 33 I/O lines connect to matrix keypads, magnetic reed switches, PIR motion sensors, and siren drivers, while the SSP peripheral interfaces with RFID or keypad encoder chips via SPI. OTP memory prevents firmware extraction or modification attempts common in physical-tamper attack scenarios. The wide temperature tolerance handles unheated garages and outdoor junction boxes. Engineers typically add external EEPROM for event logging and use the timer's capture mode for door-open duration measurement.
推薦
Point-of-Sale and Vending Peripherals
Point-of-sale terminals and vending machine controllers leverage the PIC16C64AT-04E/PT's combination of 33 I/O, SSP peripheral, and OTP cost structure. The MCU drives bill validators, coin acceptors, keypad entry, and segment displays via GPIO, while the SSP handles SPI communication with contactless card readers or peripheral expansion chips. The 3.5KB OTP stores transaction-handling firmware finalized for each machine configuration, with cost advantage over Flash parts in high-volume deployment. Industrial temperature rating supports outdoor vending enclosures subject to direct sun and winter cold. Estimated firmware size for typical vending logic is 2-3KB, fitting within the 3.5KB OTP budget.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C64AT-04E/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C64AT-04/PT | PIC16C64A-04E/PT | PIC16C64A-10E/PT | PIC16C64A-20E/PT | PIC16C64A-10I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 10 MHz | 20 MHz | 10 MHz |
| Program Memory | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40C to +125C (E suffix) | 0C to +70C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +85C |
| Packaging | Tape & Reel (T) | Tape & Reel (T) | Tray (no T) | Tray (no T) | Tray (no T) | Tray (no T) |
主要差異化特點
- Extended industrial temperature range (對比PIC16C64AT-04/PT)
- Tape-and-reel packaging for high-volume assembly (對比PIC16C64A-04E/PT)
- Lower unit cost via slower speed grade (對比PIC16C64A-20E/PT)
設計說明
Place a 100nF ceramic decoupling capacitor as close as possible to each VDD pin (pins 11 and 40), with a 10uF bulk capacitor nearby for transient suppression. The PIC16C64AT-04E/PT has two VDD pins distributed across the package to reduce supply noise; both must be decoupled even if one appears unused in the schematic. Estimated: at 4MHz clock and 33 active I/O lines, peak current draw is approximately 20-30mA, requiring adequate PCB copper pour for VDD distribution.
Route the OSC1/OSC2 traces (pins 7 and 8) as short as possible with ground guard traces to minimize EMI and clock jitter. Keep the crystal or resonator within 5mm of the MCU pins to avoid parasitic capacitance that shifts the oscillation frequency. For 4MHz operation, use a 4MHz fundamental-mode crystal with 20pF load capacitors matched to the crystal specification. Estimated: a 5mm trace adds approximately 2pF parasitic capacitance per cm.
Do not attempt to reprogram OTP memory in the field - the PIC16C64AT-04E/PT supports one-time programming only, so firmware bugs discovered after production require physical part replacement. Always validate firmware on a windowed PIC16C64A (e.g., PIC16C64A-04/JW) or Flash-based PIC16F877A before committing to OTP production. Verify MCLR/VPP pin (pin 9) is properly pulled high during operation and that the ICSP programmer timing matches Microchip's programming specification to avoid partial-program failures.
The 44-TQFP package has a theta_JA of approximately 50 C/W typical, which is adequate for the PIC16C64AT-04E/PT's typical 20-30mA current at 5V (estimated 100-150mW dissipation). At the upper end of the -40C to +125C operating range, junction temperature rise is approximately 7-10C above ambient, well within the 150C maximum junction rating. No external heatsink is required, but adequate PCB copper pour under the exposed pad helps dissipate heat in enclosed enclosures.
合規資訊
RoHS compliant per Microchip product documentation. NOT AEC-Q100 qualified - for automotive safety-critical applications, select AEC-Q100 qualified variants. Halogen-free status not explicitly stated in verified data.
