PIC16C74A-10I/PT - 8-bit OTP MCU, 7KB Flash, 10MHz, 44-TQFP
MPN: PIC16C74A-10I/PT ⚠ آخری بار خریداریPIC16C74A-10I/PT جائزہ
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, an ALU, program memory, and a rich set of peripherals. Within the broader microcontroller taxonomy, PIC16C74A sits in the legacy OTP CMOS mid-range tier: 8-bit MCU -> mid-range PIC -> PIC16C7X family -> PIC16C7X sub-family with A/D. The 'C' suffix indicates one-time programmable EPROM-based program memory, while 'A' designates a silicon revision of the original PIC16C74 die that added brown-out detect, oscillator start-up timer, and other reliability enhancements.
Key specifications include 200 ns instruction cycle at 10 MHz, 14-bit wide instruction word, 192-byte data RAM, 33 I/O pins with individual direction control, and a wide 2.5V-6.0V operating voltage range. Industrial temperature grade (-40C to +85C) is indicated by the 'I' suffix. The on-chip A/D converter has 8 input channels with 8-bit resolution. Three timer modules and a hardware USART provide versatile control and communication capability.
The PIC16C74A-10I/PT architecture uses a Harvard RISC core with separate program and data buses, allowing simultaneous instruction fetch and operand access. CMOS process technology delivers low power consumption, typically under 2 mA active at 5V/10 MHz and a few microamps in sleep mode, making it well suited to battery-powered and industrial control designs that require deterministic instruction timing.
Typical applications include industrial control systems, automotive body electronics, appliance controllers, security alarm panels, and instrumentation front-ends. The integrated A/D and PWM peripherals are particularly useful for closed-loop motor control, sensor signal conditioning, and switched-mode power supply supervisory functions. Migration to PIC16F74 (Flash) is recommended for new designs because the PIC16C74A is OTP and not field-reprogrammable.
When designing with this device, reserve a brown-out reset supervisor or use the internal BOR circuit, and place decoupling capacitors within 5 mm of VDD/SS pins. Programming the OTP memory requires a high-voltage (13V typical) programming mode, so plan the test/access fixture to support in-system programming only if you implement the parallel programming algorithm via the ICSP pins.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives (including the recommended PIC16F74 migration path), and practical design notes not found in the manufacturer datasheet.
کے لیے ڈراپ اِن متبادل PIC16C74A-10I/PT — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC16C74A-10I/PT (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, ADC, Program Memory Type, Timers, Program Memory Size.
PIC16F74-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16F747-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-10I/P
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-10/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16F914-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-10I/PT زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Series | PIC16C7X (mid-range, OTP CMOS) |
| Core | 8-bit PIC RISC, Harvard architecture |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14 words) |
| RAM Size | 192 bytes |
| EEPROM Size | None (0 bytes) |
| زیادہ سے زیادہ کلاک فریکوئنسی | 10 MHz |
| Instruction Cycle | 200 ns at 10 MHz |
| Operating Voltage Range | 2.5 V to 6.0 V |
| I/O Pins | 33 |
| ADC | 8 channels, 8-bit resolution |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit) |
| PWM Modules | 1 (CCP) |
| Communication Peripherals | USART/SCI, SSP (SPI/I2C) |
| Watchdog Timer | Yes (WDT, on-chip dedicated RC) |
| Brown-out Reset | Yes (BOR, revision A) |
| پیکیج | 44-pin TQFP (PT) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| آپریٹنگ درجہ حرارت | -40C to +85C (Industrial, 'I' suffix) |
PIC16C74A-10I/PT پن کنفیگریشن
| پن 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage input |
| پن 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| پن 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| پن 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| پن 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC reference positive |
| پن 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پن 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| پن 8 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| پن 9 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| پن 10 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
| پن 11 | VDD — Positive supply voltage |
| پن 12 | VSS — Ground reference |
| پن 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| پن 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| پن 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| پن 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| پن 17 | RC2/CCP1 — PORTC bit 2 / CCP1 (PWM output) |
| پن 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پن 19 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| پن 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| پن 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| پن 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| پن 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پن 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| پن 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| پن 26 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| پن 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| پن 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| پن 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| پن 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| پن 31 | VSS — Ground reference |
| پن 32 | VDD — Positive supply voltage |
| پن 33 | RB0/INT — PORTB bit 0 / External interrupt |
| پن 34 | RB1 — PORTB bit 1 |
| پن 35 | RB2 — PORTB bit 2 |
| پن 36 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| پن 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| پن 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| پن 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پن 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| پن 41 | AVDD — Analog positive supply voltage |
| پن 42 | AVSS — Analog ground reference |
| پن 43 | VREF- — ADC reference voltage negative input |
| پن 44 | VREF+ — ADC reference voltage positive input |
عام استعمالات
PIC16C74A-10I/PT کے لیے موزوں ہے 7 ایپلیکیشنs: Industrial Control Systems, Automotive Body Electronics, Appliance Control Boards, Security Alarm Panels, Instrumentation and Data Acquisition, HVAC and Building Automation, Smart Sensor Nodes.
Industrial Control Systems
The PIC16C74A-10I/PT fits industrial control applications because of its 33 I/O pins, 8-channel 8-bit ADC, three timers, and PWM output, which together drive sensors, actuators, and H-bridges in motor and process control loops. With 7 KB OTP and 192 bytes RAM, the device runs PID control firmware and serial communication protocols for PLC expansion modules. The 2.5V-6.0V supply tolerates 24V-derived industrial rails after regulation, and the -40C to +85C industrial temperature grade suits factory floor environments.
تجویز کردہ
Automotive Body Electronics
The PIC16C74A-10I/PT is well suited to body-electronics modules such as lighting controllers, seat-position memory, and HVAC blend-door actuators because the integrated ADC reads rheostat and thermistor inputs while the PWM CCP drives servo motors. Its 2.5V-6.0V supply and 10 MHz operation survive 12V automotive bus transients after clamp-and-filter regulation. Automotive designs should add reverse-battery, load-dump, and ESD protection external to the MCU, and verify whether the legacy OTP silicon meets AEC-Q100 requirements before deployment.
تجویز کردہ
Appliance Control Boards
In washing machines, dishwashers, and microwave ovens, the PIC16C74A-10I/PT manages user interface buttons via ADC channels, drives LED or relay loads via I/O pins, and runs timing algorithms using the 16-bit Timer1. The 33 I/O count covers multiplexed 7-segment displays and buzzer/keypad matrices without external expanders. Brown-out reset, watchdog timer, and -40C to +85C industrial temperature range support unattended appliance operation across global mains environments.
تجویز کردہ
Security Alarm Panels
The PIC16C74A-10I/PT is appropriate for alarm control panels because it reads multiple zone sensors via the 8-channel ADC, latches outputs to sirens and dialers via I/O pins, and uses the USART to drive PSTN modems. Its hardware USART and 200 ns instruction cycle support Manchester-coded data telemetry. Brown-out and watchdog features prevent lockup if the supply sags during a brownout condition. Designers should plan migration to the Flash-based PIC16F74 for service fleet reprogrammability.
تجویز کردہ
Instrumentation and Data Acquisition
The PIC16C74A-10I/PT functions as a front-end controller in instrumentation such as digital multimeters, oscilloscope front-ends, and panel meters because its 8-bit ADC samples analog inputs and the SPI/I2C SSP drives external DACs or LCD controllers. With a 10 MHz clock, the firmware sustains 4 ksps sampling rates for low-bandwidth measurement. Compared to pure analog designs, the integrated MCU reduces BOM cost and enables on-screen menus and serial data output over the USART.
تجویز کردہ
HVAC and Building Automation
In HVAC controllers, the PIC16C74A-10I/PT reads temperature and pressure sensors via the ADC, drives triac outputs for fan/blower speed control via PWM, and communicates to BACnet or Modbus networks via the USART with an external transceiver. The 33 I/O pins handle multiplexed keypad inputs and status LEDs without external I/O expansion. Industrial temperature grade and brown-out reset suit unattended rooftop and plant-room installations. Migration to PIC16F747-I/PT adds more PWM channels needed for variable-speed compressor drives.
تجویز کردہ
Smart Sensor Nodes
The PIC16C74A-10I/PT can serve as the brain of smart sensor nodes that digitize analog signals, run simple linearization algorithms in firmware, and report over UART or SPI to a gateway. With 192 bytes RAM and 7 KB OTP, it runs efficient calibration and digital-filtering routines. The on-chip watchdog and brown-out reset keep unattended nodes reliable in the field. Although the OTP memory complicates firmware updates, designers can prototype with the Flash-based PIC16F74-I/PT and migrate binaries once firmware is locked.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16C74A-10I/PT — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16F74-I/PT | PIC16F747-I/PT | PIC16F914-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (PT) | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same |
| Program Memory Type | OTP EPROM (7 KB) | Flash (4 KB) | Flash (7 KB) | Flash (14 KB) |
| RAM Size | 192 bytes | 192 bytes | 256 bytes | 336 bytes |
| Maximum Clock | 10 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 33 | 33 | 36 | 32 |
| ADC Channels | 8 x 8-bit | 8 x 8-bit | 14 x 10-bit | 8 x 10-bit |
| PWM Channels | 1 (CCP) | 1 (CCP) | 3 (CCP/ECCP) | 3 (CCP/ECCP) |
| Operating Voltage | 2.5 V to 6.0 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Lifecycle Status | Last-time-buy | Active | Active | Active |
اہم امتیازی خصوصیات
- Field-reprogrammable Flash memory (بمقابلہPIC16C74A-10I/PT (OTP))
- Faster maximum clock for higher MIPS (بمقابلہPIC16C74A-10I/PT (10 MHz))
- More ADC channels with higher resolution (بمقابلہPIC16C74A-10I/PT (8 ch x 8-bit))
ڈیزائن نوٹس
Estimated: At 5V supply and 10 MHz clock, the PIC16C74A-10I/PT draws approximately 2-5 mA active and < 5 uA in sleep mode. Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 11 and 32 on the TQFP package), and add a bulk 10 uF tantalum or aluminum electrolytic at the regulator output. The analog AVDD/AVSS pins should be filtered with a ferrite bead and a 100 nF capacitor to suppress digital switching noise from corrupting ADC readings.
The PIC16C74A-10I/PT typically dissipates < 25 mW in active mode, so thermal management is rarely required. However, in enclosed industrial environments with ambient > +70C, calculate theta_JA of the 44-TQFP package (~50 C/W on a 2-layer PCB) and ensure the die temperature stays below +125C. Use thermal vias under the exposed pad (TQFP-44 has no thermal pad; rely on copper pours) and avoid locating the MCU near hot power components like linear regulators or TRIACs.
Route the oscillator traces (OSC1/OSC2) as short as possible and keep them away from high-current switching lines to minimize EMI coupling. Place the crystal or resonator within 5 mm of the OSC pins and guard the traces with a grounded copper pour. For CE/EMC-sensitive designs, add a 4.7 kohm pull-up to MCLR and a decoupling RC (100 ohm + 100 nF) on the reset line. The ICSP pins RB6/PGD and RB7/PGC should be brought to a programming header accessible without removing the MCU.
Common pitfalls with the PIC16C74A-10I/PT: (1) OTP memory cannot be reprogrammed - plan firmware carefully and order pre-programmed parts; (2) the ADC reference VREF+ is shared with RA3, so using RA3 as a digital I/O will disturb the reference voltage; (3) PORTE pins share with parallel slave port signals, so defaulting them to analog inputs requires clearing the ADCON1 register; (4) the ICSP clock/data pins RB6/RB7 must not be left floating during normal operation - install weak pull-ups to prevent spurious interrupts on PORTB change notification.
تعمیل کی معلومات
PIC16C74A-10I/PT is OTP and last-time-buy per Microchip product page. RoHS compliance was not explicitly listed in the verified web data - check the Microchip RoHS letter for confirmation. Not AEC-Q100 qualified; for automotive, evaluate PIC16F74-I/PT extended-temperature variants or other AEC-Q100 qualified PICs.