PIC16F57T-E/SO - 8-Bit 20MHz PIC16 MCU, 3KB Flash | Microchip
MPN: PIC16F57T-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.08 | $108.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.78 | $780.00 |
PIC16F57T-E/SO Overview
What is a PIC16F5X microcontroller? The PIC16F5X is a baseline 8-bit RISC microcontroller family from Microchip, designed as a simple, low-cost entry point into the PIC architecture. PIC microcontrollers sit within the broader category of microcontrollers, which are single-chip computers integrating CPU, RAM, non-volatile program memory, and I/O peripherals. Within the MCU taxonomy, the PIC16F5X belongs to the 8-bit MCU tier using a RISC (Reduced Instruction Set Computing) architecture, distinct from 16-bit PIC24, 32-bit PIC32, and Cortex-M families. The PIC16F5X uses a 12-bit instruction word and exposes 33 single-word instructions, delivering 2:1 code compression over competitive 8-bit MCUs in its class.
The device features 33 single-word instructions, a two-level hardware stack, 8-bit timer/counter with prescaler, watchdog timer with its own on-chip RC oscillator, power-on reset, and power-saving SLEEP mode. It uses a Harvard architecture with separate program and data buses, achieving deterministic execution and most instructions completing in one instruction cycle. The 20 MHz input clock yields a 200 ns instruction cycle, and the on-chip RC oscillator eliminates an external resonator in many designs.
Typical applications include automotive subsystems, industrial control logic, appliance control boards, sensor signal conditioning, low-end consumer electronics, LED driving, simple motor control, and battery-powered embedded devices where the -40C to +125C temperature range and tape-and-reel packaging make it suitable for high-volume surface-mount assembly. The SOIC-28 wide-body package is compatible with hand-soldering and automated SMT lines.
When designing with this part, choose the -E (extended) grade for automotive or industrial temperature exposure and the standard -I grade for commercial/consumer designs. The flash memory is one-time programmable by Microchip; in-circuit serial programming (ICSP) is supported via dedicated RB6/RB7 pins, enabling firmware updates in production.
Drop-in alternatives for PIC16F57T-E/SO — 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 PIC16F57T-E/SO (same form factor and footprint) — differing in Package, Timers, Operating Temperature, Program Memory Size, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F57T-I/SO
✅ Drop-In✓ In Stock
$0.65 / Unit
View Datasheet →PIC16F57-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F57-I/SO
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →PIC16F54T-E/SO
✅ Drop-In✓ In Stock
$0.8 / Unit
View Datasheet →PIC16F57T-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 RISC (PICmicro) |
| Family | PIC16F5X baseline |
| Program Memory Type | Flash |
| Program Memory Size | 3KB (2K x 12) |
| RAM Size | 72 bytes |
| Data EEPROM | Not present |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Instruction Set Size | 33 single-word instructions |
| Instruction Width | 12 bits |
| I/O Pins | 20 |
| Supply Voltage | 2.5 V / 3.3 V / 5 V |
| Operating Temperature | -40C to +125C (E - extended) |
| Package | 28-pin SOIC wide-body (SO), 7.50 mm width |
| Mounting Type | Surface Mount, Tape & Reel |
| Peripherals | 8-bit Timer/Counter, Watchdog Timer, Power-On Reset |
| ICSP Programming | Yes (RB6/RB7) |
| RoHS Status | Compliant |
PIC16F57T-E/SO Pin Configuration
| Pin 1 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 2 | RA1 — Bidirectional I/O port A bit 1 |
| Pin 3 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 4 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 5 | RA4/T0CKI — RA4 / Timer0 clock input |
| Pin 6 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RB0/INT — RB0 / External interrupt input |
| Pin 9 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 10 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 11 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 12 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 13 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 14 | RB6 — Bidirectional I/O port B bit 6 / ICSP clock |
| Pin 15 | RB7 — Bidirectional I/O port B bit 7 / ICSP data |
| Pin 16 | VDD — Positive supply voltage |
| Pin 17 | RC0 — Bidirectional I/O port C bit 0 |
| Pin 18 | RC1 — Bidirectional I/O port C bit 1 |
| Pin 19 | RC2 — Bidirectional I/O port C bit 2 |
| Pin 20 | RC3 — Bidirectional I/O port C bit 3 |
| Pin 21 | RC4 — Bidirectional I/O port C bit 4 |
| Pin 22 | RC5 — Bidirectional I/O port C bit 5 |
| Pin 23 | RC6 — Bidirectional I/O port C bit 6 |
| Pin 24 | RC7 — Bidirectional I/O port C bit 7 |
| Pin 25 | OSC1 — Oscillator input / external clock input |
| Pin 26 | OSC2 — Oscillator output |
| Pin 27 | VSS — Ground reference (second VSS pin) |
| Pin 28 | VDD — Positive supply (second VDD pin) |
Typical Applications
PIC16F57T-E/SO is suitable for 6 applications: Automotive Body Electronics, Industrial Sensor Signal Conditioning, Appliance Control Boards, LED Lighting Drivers, Battery-Powered IoT Sensor Nodes, Simple Motor Control (Brushed DC, Small BLDC).
Automotive Body Electronics
The PIC16F57T-E/SO's -40C to +125C extended temperature grade and SOIC-28 wide-body package make it a strong fit for under-dash automotive body modules including seat controllers, mirror adjusters, and lighting drivers. Its 3KB flash is sufficient for lamp-fade sequencing logic and PWM dimming control, while the 8-bit timer/counter generates the dimming waveforms. Compared to automotive-grade alternatives costing 3-5x more, this baseline PIC16F5X delivers the right computational budget for simple load-switching applications, and the 20 MHz CPU clock handles brushed-motor PWM at frequencies above the audible band.
Recommended
Industrial Sensor Signal Conditioning
In industrial sensor interface boards, the PIC16F57T-E/SO reads analog signals through external ADCs, applies calibration coefficients, and drives 4-20 mA or 0-10 V output stages. The 33-instruction RISC set simplifies deterministic loop execution for control loops up to ~1 kHz, and the 2.0-5.5 V supply range accommodates both 24V-bus-derived and 3.3V logic-rail power. The 72-byte RAM constrains firmware to small state machines, but the extended -40C to +125C grade allows deployment in factory-floor enclosures without thermal derating. PCB designers should reserve the exposed SOIC-28 pads for thermal vias when dissipating >200 mW in continuous operation.
Recommended
Appliance Control Boards
White-goods appliances including washing machines, dishwashers, and microwave ovens use PIC16F57T-E/SO as the user-interface controller driving 7-segment LED displays, keypad scanning, and relay sequencing. The 20 I/O pins are adequate for 4-digit displays plus 16 keypad/LED lines, and the SOIC-28 wide-body withstands the thermal cycling of appliance environments. With 3KB flash, designers can implement multi-state cycle logic, error-code display, and buzzer-control algorithms in a single chip. Compared to capacitive-touch MCUs, this baseline part delivers lower BOM cost at the price of simpler user interfaces.
Recommended
LED Lighting Drivers
The PIC16F57T-E/SO drives LED constant-current sinks via PWM outputs on its CCP/port pins, generating flicker-free dimming curves for architectural and signage lighting. Its 20 MHz CPU enables PWM frequencies above 1 kHz to avoid perceptible flicker, and the extended temperature grade ensures stable operation in enclosed luminaires reaching 70-80C internal ambient. The 3KB flash accommodates logarithmic dimming curves and addressable-protocol stacks (e.g. simplified DMX). The SOIC-28 W package provides sufficient PCB copper area for the modest 200-400 mW dissipation of typical LED-driver firmware.
Recommended
Battery-Powered IoT Sensor Nodes
For low-duty-cycle battery-powered sensor nodes, the PIC16F57T-E/SO delivers 2.0 V minimum operation enabling direct connection to depleted 2xAA alkaline cells down to 1.8 V system voltage (with boost converter). The hardware SLEEP mode draws microamp-level standby current, and the watchdog timer wakes the MCU on periodic intervals to take sensor readings and transmit via an external radio module. With 3KB flash, the firmware can implement simple proprietary RF protocols or UART bridges. Compared to 32-bit Cortex-M0+ alternatives costing 2-3x more, this PIC16F5X baseline is the budget choice for disposable or high-volume sensor tags.
Recommended
Simple Motor Control (Brushed DC, Small BLDC)
Small brushed-DC and low-power BLDC motors in fans, pumps, and toys are well-served by the PIC16F57T-E/SO driving MOSFET half-bridges through its PWM and direction-control pins. The 20 MHz CPU can generate 20 kHz+ PWM frequencies for silent motor commutation, and the 8-bit timer/counter handles back-EMF sensing or tachometer feedback. The extended -40C to +125C grade supports under-hood automotive and outdoor industrial deployments. Designers should pair this MCU with gate drivers like the TC4427 for the actual MOSFET switching, since the PIC outputs cannot drive large gate capacitances directly.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F57T-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F57T-I/SO | PIC16F57-E/SO | PIC16F57-I/SO | PIC16F54T-E/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (7.50 mm wide) | SOIC-28 (7.50 mm wide) - same | SOIC-28 (7.50 mm wide) - same | SOIC-28 (7.50 mm wide) - same | SOIC-28 (7.50 mm wide) - same |
| Program Memory | 3KB (2K x 12) Flash | 3KB Flash - same | 3KB Flash - same | 3KB Flash - same | 768B Flash (-75%) |
| RAM Size | 72 bytes | 72 bytes - same | 72 bytes - same | 72 bytes - same | 25 bytes (-65%) |
| Max CPU Frequency | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) |
| Packaging Format | Tape & Reel | Tape & Reel | Tube | Tube | Tape & Reel |
| I/O Pins | 20 | 20 - same | 20 - same | 20 - same | 12 (-40%) |
| Supply Voltage Range | 2.0 V to 5.5 V | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same |
Key Differentiators
- Extended temperature grade in tape-and-reel format (vs PIC16F57T-I/SO)
- Larger program memory than the smaller-flash cousin (vs PIC16F54T-E/SO)
- Tube-packaging alternative for low-volume prototype builds (vs PIC16F57T-E/SP)
- Same die as commercial variant - simplified qualification (vs PIC16F57-I/SO)
Design Notes
The PIC16F57T-E/SO accepts 2.0 V to 5.5 V on VDD (pin 16) and VDD (pin 28); both VDD pins must be connected, and both VSS pins (7 and 27) must be tied to ground. Place a 100 nF decoupling capacitor within 5 mm of each VDD pin and a 10 uF bulk capacitor near the MCU. The on-chip power-on reset eliminates external reset ICs in most designs, but if VDD rise time exceeds the POR specification, an external RC on MCLR (pin 6) ensures deterministic startup.
Route the SOIC-28 wide-body pads on a 1.27 mm pitch (50 mil) SOIC footprint with at least 0.5 mm trace clearance. For designs consuming >200 mW continuously, add a thermal copper pour under the exposed die paddle area - the SOIC-28 W package has a thermal resistance of approximately 80 C/W to ambient. Place the ICSP header (RB6/RB7/MCLR/VDD/VSS) at the board edge to enable in-circuit programming without disassembling the product enclosure.
Common pitfalls with this part: (1) configuring RA4 as digital output - RA4 is open-drain and requires a pull-up resistor; (2) forgetting to disable the watchdog timer in low-power designs - WDT activation in SLEEP can prevent proper wake-up; (3) attempting to use the MCLR pin as a digital I/O - MCLR is input-only and active-low reset; (4) exceeding 5.5 V on any I/O pin when VDD = 5 V (I/O Vih max is VDD + 0.3 V); (5) using the internal RC oscillator without trimming for UART applications - the calibrated HFINTOS is +/-2% accurate, which may exceed UART timing tolerance.
Keep the OSC1/OSC2 traces short and symmetric, and place the crystal (or resonator) within 10 mm of the MCU. If using the internal 4 MHz RC oscillator, leave OSC1 grounded and OSC2 unused to reduce EMI coupling into adjacent analog traces. For noise-sensitive applications (sensor readout, ADC interfacing), route digital I/O traces away from analog signal paths and use a ground guard ring around analog input pins.
Compliance Information
RoHS and REACH compliant per Microchip product page declarations. The -E suffix denotes extended industrial temperature grade but is NOT AEC-Q100 qualified; for AEC-Q100 automotive qualification, designers should consult Microchip's automotive-grade PIC product lines. Lead-free and halogen-free per Microchip material declarations.
