PIC16C554-04E/SS - 4MHz 8-Bit OTP MCU, 20-SSOP | Microchip
MPN: PIC16C554-04E/SS ✓ فعالPIC16C554-04E/SS جائزہ
What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a class of MCU whose program memory can be written only once after manufacture, typically using EPROM cells exposed through a programming window or via ICSP. OTP MCUs sit between fully-mask-ROM parts (lowest unit cost, but require a full production mask) and Flash-based MCUs (re-programmable, higher die cost). They are widely used in cost-sensitive, high-volume consumer and industrial products where firmware is finalized at design lock and re-programmability is not required. Architecturally, the PIC16C554 belongs to the PIC16C family: RISC-based 8-bit core, single accumulator (W), Harvard memory map, 12-bit (or 14-bit for PIC16C55x) instruction width, and 35 single-word instructions.
Key differentiating features of the PIC16C554-04E/SS include its 13 general-purpose digital I/O pins, integrated Power-on Reset (POR), Watchdog Timer (WDT) with on-chip RC oscillator, and a wide 3.0 V to 5.5 V operating voltage range (PIC16C554-04 variant). The "E" temperature-grade suffix denotes the -40 °C to +125 °C automotive/extended industrial range, while the "04" speed designator specifies the 4 MHz maximum oscillator frequency. The 20-SSOP package (JEDEC MO-150, 5.30 mm body) provides a low-profile surface-mount footprint with gull-wing leads for high-yield automated assembly.
Architecturally, the PIC16C554 uses Microchip's classic PIC RISC core with a two-stage pipeline, dedicated hardware stack (2 levels for this family), and a 14-bit wide instruction word that allows single-cycle opcode fetch and execute. The ALU operates on the working register (W) plus any file register; bit-oriented instructions (BSF, BCF) and byte-oriented instructions provide compact code density. The device has no on-chip oscillator, requiring an external crystal, ceramic resonator, or RC network on OSC1/OSC2.
Typical applications include automotive body and chassis ECUs (HVAC controls, seat modules, mirror controllers), white goods and appliance control boards (washing machines, dishwashers, microwave ovens), low-cost consumer electronics (remote controls, toys, small appliances), industrial sensor signal conditioning, and battery-powered instrumentation where the small code footprint and low pin count are advantageous. In many legacy designs, the PIC16C554 continues to be specified because of its long-term firmware stability and Microchip's continued availability through the automotive/extended-temperature supply chain.
Design tip: The PIC16C554 has no internal oscillator - the system clock must be supplied externally on OSC1/OSC2. For low-power standby designs, the SLEEP instruction halts the core clock but the WDT can continue running; choose WDT postscaler carefully to balance wake-up latency with current draw. The MCLR reset pin must be pulled high through a resistor for normal operation; a simple RC on MCLR provides a power-on reset delay.
This page consolidates distributor pricing, drop-in 20-SSOP alternatives within the PIC16C5x family, and practical design notes that go beyond the manufacturer datasheet's basic specifications.
کے لیے ڈراپ اِن متبادل PIC16C554-04E/SS — 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 PIC16C554-04E/SS (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Program Memory Type, Program Memory Size, Timers, RAM Size.
PIC16C554-04I/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C554T-04E/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C554-04E/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C554-04E/P
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C54C-04E/SS
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16C55-10I/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C554-04E/SS زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core | PIC 8-bit RISC |
| Instruction Set Width | 14-bit |
| Number of Instructions | 35 (single-word) |
| Program Memory Type | OTP (EPROM-based) |
| Program Memory Size | 896 B (512 x 14) |
| RAM Size | 80 B |
| EEPROM Size | None |
| زیادہ سے زیادہ کلاک فریکوئنسی | 4 MHz |
| Instruction Cycle Time | 200 ns @ 4 MHz |
| Operating Voltage Range | 3.0 V to 5.5 V |
| I/O Pins | 13 |
| Peripherals | POR, WDT (on-chip RC) |
| پیکیج | 20-SSOP (5.30 mm body, 0.65 mm pitch) |
| ماؤنٹنگ ٹائپ | Surface Mount (Gull-wing) |
| آپریٹنگ درجہ حرارت | -40 °C to +125 °C (E grade) |
| Temperature Grade | Automotive / Extended |
| Lead-Free / RoHS | Compliant |
| Timers | 1 x 8-bit (TMRO) |
| ADC | None |
| Communication | None (no UART/SPI/I2C hardware) |
PIC16C554-04E/SS پن کنفیگریشن
| پن 1 | RA2 — Bidirectional I/O port A bit 2 |
| پن 2 | RA3 — Bidirectional I/O port A bit 3 |
| پن 3 | RA4/T0CKI — Bidirectional I/O port A bit 4 / Timer0 clock input |
| پن 4 | MCLR — Master Clear (reset) input, active low |
| پن 5 | VSS — Ground reference |
| پن 6 | RB0/INT — Bidirectional I/O port B bit 0 / External interrupt input |
| پن 7 | RB1 — Bidirectional I/O port B bit 1 |
| پن 8 | RB2 — Bidirectional I/O port B bit 2 |
| پن 9 | RB3 — Bidirectional I/O port B bit 3 |
| پن 10 | RB4 — Bidirectional I/O port B bit 4 |
| پن 11 | RB5 — Bidirectional I/O port B bit 5 |
| پن 12 | RB6 — Bidirectional I/O port B bit 6 |
| پن 13 | RB7 — Bidirectional I/O port B bit 7 |
| پن 14 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| پن 15 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| پن 16 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| پن 17 | RA0 — Bidirectional I/O port A bit 0 |
| پن 18 | RA1 — Bidirectional I/O port A bit 1 |
| پن 19 | NC — Not connected (per datasheet, pin reserved) |
| پن 20 | NC — Not connected (per datasheet, pin reserved) |
عام استعمالات
PIC16C554-04E/SS کے لیے موزوں ہے 6 ایپلیکیشنs: Automotive Body Control Modules, White Goods and Appliance Control, Low-Cost Consumer Electronics, Industrial Sensor Signal Conditioning, Battery-Powered Instrumentation, Legacy System Sustainment / EOL Bridge.
Automotive Body Control Modules
The PIC16C554-04E/SS is well-suited for automotive body and chassis ECUs including HVAC blend-door actuators, seat-position controllers, mirror-fold modules, and window lift switches. Its 896 B OTP program memory is sufficient for the small state machines driving these loads, while the 13 GPIO pins can directly drive relays, LEDs, and H-bridge enable signals through external FETs. The E temperature grade (-40C to +125C) tolerates under-hood and door-mounted thermal stress. Unlike flash-based PIC16F parts, the OTP architecture means firmware is locked at production, eliminating the risk of field reprogramming by unauthorized tools - a benefit for OEM IP protection. Designers typically pair the MCU with a TC4427 gate driver and use TMRO for debounce and PWM generation.
تجویز کردہ
White Goods and Appliance Control
In washing machines, dishwashers, and microwave ovens, the PIC16C554-04E/SS functions as the user-interface and motor-control supervisory MCU. Its 35 single-word instructions and 200 ns cycle time deliver deterministic response to keypad events, while the on-chip Watchdog Timer with dedicated RC oscillator recovers the system from motor-induced EMI upsets. The 13 GPIOs scan 4x4 matrix keypads, drive 7-segment or character LCD bias, and toggle triac/relay outputs via zero-cross optocouplers. OTP one-time programmability locks the calibration constants at production line, preventing field tampering. The 20-SSOP package profile sits below the user-accessible enclosure, saving PCB area versus larger DIP variants.
تجویز کردہ
Low-Cost Consumer Electronics
Remote controls, electronic toys, and small kitchen appliances leverage the PIC16C554-04E/SS to keep BOM cost below $1 USD while maintaining Microchip's reputation for reliable RISC cores. The 896 B OTP holds sophisticated IR protocols (RC5, NEC, Sony SIRC) or toy sound-effect sequencers with room to spare. The 8-bit TMRO generates precise carrier frequencies (38 kHz, 56 kHz) for IR transmission without CPU overhead. SLEEP mode plus WDT wake-up delivers multi-year battery life in coin-cell toys. The 20-SSOP low-profile footprint allows placement inside ultra-thin remote enclosures. Engineers migrating from PIC16C54 code can reuse most firmware with minor changes due to register-compatible core architecture.
تجویز کردہ
Industrial Sensor Signal Conditioning
Factory-floor sensor interfaces use the PIC16C554-04E/SS to linearize thermistor/RTD bridges, multiplex multiple analog inputs through external analog switches, and present calibrated data on UART-emulated bit-banged GPIO. The 4 MHz oscillator and 200 ns instruction cycle allow software-based 10-bit sigma-delta ADC implementations at rates up to 1 kHz when paired with an external op-amp integrator. The wide 3.0-5.5 V supply range tolerates 24V industrial rails after front-end regulation. E temperature grade supports outdoor enclosures and proximity to motors. OTP memory locks factory calibration coefficients, ensuring field units cannot be inadvertently re-tuned.
تجویز کردہ
Battery-Powered Instrumentation
Handheld multimeters, portable data loggers, and field-test instruments adopt the PIC16C554-04E/SS for its combination of low cost, deterministic RISC execution, and the SLEEP + WDT wake-up mechanism that delivers multi-year battery life on 2x AA cells. The 13 GPIOs drive LCD segment bias, scan key matrices, and toggle low-side FETs for measurement ranges. With the system clock stopped, the WDT draws only microamps from its internal RC oscillator, allowing duty-cycled wake-measure-transmit operation. OTP storage locks the calibration certificate at manufacture, satisfying NIST-traceable instrumentation requirements.
تجویز کردہ
Legacy System Sustainment / EOL Bridge
OEMs with installed bases of products built around the PIC16C554 use this part as a long-term sustainment component to service field returns, warranty repairs, and regulatory re-certifications. Microchip has committed to multi-decade availability of legacy OTP microcontrollers specifically to support automotive and industrial customers whose end-product life cycles exceed 15 years. The E temperature grade, RoHS compliance, and continued factory production (per Microchip's product longevity program) make this part a safe choice for repair stock and newly-built units that must match legacy firmware behavior. Designers should pin-compatible migrate to PIC16C554-04I/SS for benign environments to reduce unit cost.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16C554-04E/SS — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16C554-04I/SS | PIC16C554T-04E/SS | PIC16C554-04E/SO | PIC16C55-10I/SS | PIC16C54C-04E/SS |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SOIC (wide-body, different footprint) | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | |
| Program Memory (OTP) | 896 B (512 x 14) | 896 B | 896 B | 768 B (-14%) | 512 B (-43%) | |
| RAM Size | 80 B | 80 B | 80 B | 25 B | 25 B | |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 10 MHz | 4 MHz | |
| Operating Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | |
| Temperature Grade | -40C to +125C (E / Automotive) | -40C to +85C (I / Industrial) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | |
| I/O Pins | 13 | 13 | 13 | 12 | 12 |
اہم امتیازی خصوصیات
- Extended -40C to +125C automotive temperature grade with OTP firmware lock (بمقابلہPIC16C554-04I/SS)
- Larger 896 B OTP and 80 B RAM versus PIC16C54C family (بمقابلہPIC16C54C-04E/SS)
- Same 20-SSOP pinout as PIC16C55 family but with slower 4 MHz speed grade (بمقابلہPIC16C55-10I/SS)
ڈیزائن نوٹس
The PIC16C554-04E/SS has no internal oscillator, so the system clock must be supplied externally on OSC1/OSC2. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of pin 14, plus a 10 µF tantalum or aluminum-polymer bulk capacitor on the same rail. During SLEEP the core stops but the WDT continues running from its internal RC; the typical sleep current is <1 µA at 3 V, allowing multi-year battery life in coin-cell designs.
The 20-SSOP package has a 0.65 mm pitch and 5.30 mm body width per JEDEC MO-150. Route all signals on the outer layers and place a continuous ground pour on the inner layer directly under the IC body for thermal spreading. Keep crystal traces short (under 10 mm) and surround them with a ground guard ring to reduce EMI susceptibility. The MCLR pin (4) requires a 10 kohm pull-up to VDD; adding a 100 nF capacitor to ground on MCLR provides a software-free power-on reset delay.
Three pitfalls trip up first-time PIC16C554 designers: (1) the device is OTP - firmware cannot be erased or re-programmed in-circuit; use a PIC16C554-04I/SS engineering sample or a flash-based PIC16F15344 for development; (2) there is no UART, SPI, or I2C hardware - implement these protocols via bit-banging on GPIO; (3) the Watchdog Timer is enabled by configuration fuse and uses a separate internal RC oscillator (~18 µs nominal period) - postscaler must be configured in software to set the actual WDT timeout. Failing to disable the WDT in low-power designs can drain batteries faster than expected.
When using GPIO pins to bit-bang high-speed protocols (IR carriers at 38 kHz, RC5 at 36 kHz, NEC at 38 kHz), keep the carrier generation tight by aligning the toggle with TMRO overflow interrupts. A 4 MHz oscillator yields 1 µs instruction cycles, so a half-period toggle at 38 kHz (13.2 µs) leaves roughly 6 instructions for housekeeping. Place any RC low-pass filter on GPIO outputs within 5 mm of the pin to suppress ringing; add a 33 ohm series resistor on fast-edge signals to dampen transmission-line effects on the 20-SSOP lead frame.
تعمیل کی معلومات
RoHS and REACH compliance per Microchip product declaration; lead-free 20-SSOP package. AEC-Q100 automotive qualification status not explicitly listed in provided data - set to unknown. E temperature grade (-40C to +125C) supports automotive operating environments but does not imply AEC-Q100 certification.
