PIC16C622T-04E/SS - 8-Bit 4MHz OTP MCU 3.5KB 20-SSOP | Microchip
MPN: PIC16C622T-04E/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.86 | $28.60 |
| 100 | $2.4 | $240.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.78 | $1,780.00 |
PIC16C622T-04E/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces into one package. Within the broader taxonomy of semiconductors, an MCU belongs to the digital logic / microcontroller class, and the PIC16C series occupies the mid-range 8-bit tier of Microchip's PIC portfolio, offering RISC architecture with a 14-bit instruction word optimized for compact, deterministic control code. OTP program memory allows the device to be programmed once during manufacturing, which lowers unit cost versus flash-based MCUs and is well suited to high-volume, fixed-function consumer and industrial products.
Key features of the PIC16C622T-04E/SS include the 14-bit instruction set, 35 single-word instructions (most single-cycle), a hardware multiplier, Brown-out Detect/Reset, Power-On Reset (POR), Watchdog Timer (WDT) with its own on-chip RC oscillator, an analog comparator, a programmable voltage reference, and a Capture/Compare/PWM (CCP) module. The wide 2.0V to 6.0V supply range allows battery-backed or 5V-rail designs, and the 20-SSOP outline saves board area versus a 20-pin PDIP alternative.
Architecturally, the PIC16C622 uses a Harvard bus with separate program and data paths and a 2-stage pipeline. On-chip peripherals include a 16-bit timer/counter (TMR1) optionally operable in sleep mode with an external crystal, an 8-bit timer/counter (TMR0) with 8-bit prescaler, and synchronous serial port (SSP) for SPI / I2C master-slave communication. Two analog comparators with a programmable reference voltage block add signal-conditioning capability without external op-amps.
Typical applications include white-goods and appliance controls, low-end remote controls, sensor signal conditioning with on-chip comparators, simple sensor-front-end nodes, battery chargers, automotive body controllers, lighting ballasts, and industrial control subsystems where cost dominates over reprogrammability. The extended temperature grade extends use to under-hood and outdoor enclosures.
When designing with this device, ensure that the chosen emulator/programmer (PICMASTER, MPLAB PM3, or PRO MATE II) supports the PIC16C62x OTP windowed/extended parts, and budget for a 25 mA / 6 V absolute maximum on VDD plus proper decoupling with 0.1 uF + 10 uF bulk capacitors. Pin-compatible PIC16C62x family members exist in the same 20-SSOP package, simplifying last-time buys and PCB reuse.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C6xx family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16C622T-04E/SS — 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 PIC16C622T-04E/SS (same form factor and footprint) — differing in Program Memory Size, Operating Temperature Range, Program Memory Type, RoHS Status, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C622T-04/SS
✅ Drop-In✓ In Stock
$1.49 / Unit
View Datasheet →PIC16C622-04E/SS
✅ Drop-In✓ In Stock
$1.4 / Unit
View Datasheet →PIC16C622-04/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16C622-20E/SS
✅ Drop-In✓ In Stock
$2.49 / Unit
View Datasheet →PIC16C622-20/SS
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC16C622T-04E/SO
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →PIC16C622T-04E/SS Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Series | PIC16C62x |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 x 8 bytes |
| EEPROM Size | None |
| Maximum Clock Frequency | 4 MHz |
| Instruction Set Width | 14-bit |
| Number of I/O Pins | 13 |
| Supply Voltage Range | 2.0 V to 6.0 V |
| Operating Temperature Range | -40 C to +125 C (E grade, extended) |
| Package | 20-SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
| Oscillator Type | External |
| Peripherals | Brown-out Detect/Reset, POR, WDT, 2 Comparators, Programmable VREF, CCP, SSP (SPI/I2C) |
| Number of Timers | 2 (TMR0 8-bit, TMR1 16-bit) |
| RoHS Status | Non-compliant (contains lead in SSOP finish - verify variant) |
PIC16C622T-04E/SS Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2; analog comparator 1 output |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3; analog comparator 1 inverting input |
| Pin 3 | RA4 — Bidirectional I/O port A bit 4; T0CKI clock input |
| Pin 4 | RA5 — Bidirectional I/O port A bit 5; analog comparator 2 inverting input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O port B bit 0; external interrupt |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4; interrupt-on-change |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5; interrupt-on-change |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6; interrupt-on-change, ICSP clock |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7; interrupt-on-change, ICSP data |
| Pin 14 | VSS — Ground reference |
| Pin 15 | OSC1 — External oscillator input; crystal/resonator connection |
| Pin 16 | OSC2 — External oscillator output; crystal/resonator connection |
| Pin 17 | RA0 — Bidirectional I/O port A bit 0; analog comparator 2 output |
| Pin 18 | RA1 — Bidirectional I/O port A bit 1; analog comparator 1 non-inverting input |
| Pin 19 | MCLR — Master Clear reset input; active low |
| Pin 20 | VDD — Positive supply voltage (2.0 V to 6.0 V) |
Typical Applications
PIC16C622T-04E/SS is suitable for 6 applications: White Goods and Appliance Control, Automotive Body Electronics, Industrial Sensor Front-Ends, Lighting Ballast and LED Driver Controllers, Remote Control and Consumer IR, Battery Chargers and Power Tools.
White Goods and Appliance Control
The PIC16C622T-04E/SS fits washing-machine, dishwasher, and refrigerator control boards because its 3.5 KB OTP holds a complete state-machine for motor sequencing, sensor polling, and user-interface handling while 128 bytes of RAM covers real-time variables. The two on-chip analog comparators accept 50/60 Hz zero-crossing signals for triac timing without external op-amps, saving both board space and BOM cost. Brown-out Reset and Power-On Reset protect the MCU during the brown-outs common in compressor-driven appliances. The -40 C to +125 C extended grade handles under-cabinet heat and motor-driver proximity.
Recommended
Automotive Body Electronics
Body controllers for seat adjusters, mirror modules, lighting clusters, and HVAC blend doors are dominated by 8-bit MCUs, and the PIC16C622T-04E/SS targets these directly through its -40 C to +125 C extended grade and 2.0-6.0 V supply, which tolerates cranking transients on the 12 V automotive bus when fed through a pre-regulator. The 13 GPIO lines drive relays, LED strings, and H-bridge enable pins directly. Hardware WDT with its own RC oscillator resets the controller when firmware locks up under EMI stress. Designers should confirm that PIC16C62x in 20-SSOP is qualified by the automaker's component acceptance procedure.
Recommended
Industrial Sensor Front-Ends
Sensor transmitters for pressure, level, flow, and temperature often need a microcontroller that can run 4-20 mA loop-powered or 24 V industrial-bus powered, condition analog signals, run a PID-style control loop, and drive an HART or MODBUS interface. The PIC16C622T-04E/SS's 13 GPIO, two analog comparators with programmable reference, and 16-bit TMR1 with capture register fit 4-20 mA loop-smart sensors where the OTP memory locks the calibration coefficients at programming. The wide 2.0-6.0 V supply allows the same MCU to be used across 3.3 V and 5 V sensor variants.
Recommended
Lighting Ballast and LED Driver Controllers
Fluorescent and HID ballasts use 8-bit MCUs to manage lamp warm-up, dimming, power-factor correction, and fault detection. The PIC16C622T-04E/SS runs the ballast state machine at 4 MHz with deterministic instruction timing, while its Capture/Compare/PWM module generates the lamp-drive switching waveform directly. The Brown-out Reset trips cleanly when the rectified mains drops below regulation. The 20-SSOP footprint simplifies high-density ballast PCB layouts where the controller sits next to the power MOSFETs. Extended temperature supports enclosed luminaire environments that exceed 70 C ambient.
Recommended
Remote Control and Consumer IR
Universal remote controls and simple IR transceivers need a low-cost, low-power MCU that runs a fixed IR protocol stack. The PIC16C622T-04E/SS's 3.5 KB OTP accommodates complete RC5/RC6 or NEC protocol decoders plus user-button matrix scanning on the 13 GPIO. The 16-bit TMR1 captures IR carrier edges accurately, while the SSP block talks to external EEPROM for learned-code storage. Sleep current is well under 1 uA with WDT running, supporting multi-year battery life on a coin cell.
Recommended
Battery Chargers and Power Tools
Cordless-drill and battery-charger controllers need an MCU that runs a charge algorithm (CC/CV for Li-ion, delta-V for NiMH, timer for SLA) and monitors pack thermistors. The PIC16C622T-04E/SS uses its on-chip analog comparators to detect end-of-charge voltage and temperature cutoffs without external op-amps. Brown-out Reset and the hardware WDT recover from inductive transients produced by brushed DC motors. The extended temperature range tolerates the elevated operating temperatures inside a charger housing that sits behind a high-current rectifier.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C622T-04E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C622T-04/SS | PIC16C622-04E/SS | PIC16C622-20E/SS | PIC16C622T-04E/SO |
|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SOIC (different footprint) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 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 x 8 bytes | 128 x 8 bytes | 128 x 8 bytes | 128 x 8 bytes | 128 x 8 bytes |
| Operating Temperature | -40 C to +125 C (E grade) | 0 C to +70 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| Supply Voltage | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V |
| Number of I/O | 13 | 13 | 13 | 13 | 13 |
Key Differentiators
- Extended industrial temperature grade in a 20-SSOP (vs PIC16C622T-04/SS)
- Higher 20 MHz speed grade available pin-compatible (vs PIC16C622-20E/SS)
- On-chip dual comparators with programmable VREF (vs PIC16C620A family)
Design Notes
The PIC16C622T-04E/SS uses One-Time Programmable (OTP) memory. Once a program is written, the device CANNOT be reprogrammed or code-erased, so a single bit error during development requires scrapping the part. Always build prototypes with PIC16C62x windowed (JW) or PIC16F62x flash parts and migrate to PIC16C622T-04E/SS only after firmware is fully validated. OTP also means field firmware updates are impossible - if your application needs field upgrades, choose PIC16F622 instead.
Place a 0.1 uF decoupling capacitor as close as possible between VDD (pin 20) and VSS (pin 14), with a 10 uF bulk tantalum or ceramic on the same rails. The PIC16C622 is sensitive to supply ripple during EEPROM/OTP programming and to ADC comparator noise during analog acquisition. Keep crystal traces short (<5 mm) and guard-pin the OSC1/OSC2 area with a ground ring to reduce EMI susceptibility from adjacent switching power stages.
The MCLR pin (pin 19) on PIC16C62x is active-low reset and MUST be pulled high through a 10 kohm resistor for normal operation. Do not leave it floating. If in-circuit serial programming (ICSP) is needed, the ICSP connector should sit on MCLR/RB6/RB7/VSS/VDD only and share no other MCU pins. RB6 and RB7 are used as ICSP clock/data and must remain unused in the application or be isolated from external drivers during programming.
The two on-chip analog comparators share their inputs with RA0-RA3 and are not multiplexed to dedicated ADC channels; their offset is +/- 5 mV typical and +/- 25 mV worst-case. For sub-25 mV threshold detection, calibrate the comparator reference in firmware or use an external op-amp. The programmable voltage reference block provides selectable reference steps between 0.31 V and VDD in 7 levels - choose the step that places the comparator threshold above the offset to avoid chatter.
Compliance Information
PIC16C62x family predates RoHS adoption. SSOP finish is typically lead-based. AEC-Q100 qualification is not published for this commercial/industrial part; automotive designs should confirm acceptance at the OEM level.