COP8SAC720M8/NOPB - 8-bit 10MHz 4KB OTP MCU | Texas Instruments
MPN: COP8SAC720M8/NOPB ✗ סוף ייצורCOP8SAC720M8/NOPB סקירה
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and programmable I/O peripherals on one IC. OTP microcontrollers ship blank and are programmed once by the OEM or via a programming socket before deployment - ideal for low-cost, medium-volume production where mask-ROM NRE charges are not justified. The COP8 core uses a CISC instruction set optimized for byte-level bit manipulation, common in white-goods and appliance control.
Key features of the COP8SAC720M8/NOPB include 4KB (4K x 8) OTP program memory, 128 x 8 RAM, an integrated power-on reset circuit that holds the CPU in reset until VDD stabilizes, 16 general-purpose I/O pins multiplexed with peripheral functions, a programmable watchdog timer, and an 8-bit timer/counter. The 10MHz clock supports instruction-cycle execution in the 200ns range, sufficient for slow loop-control and user-interface scanning tasks.
Typical applications for the COP8SAC720M8/NOPB include white-goods controllers (washing machines, dishwashers, microwave ovens), HVAC thermostats, low-end remote controls, simple sensor read-out boards, and replacement of discrete 8-bit logic in legacy product lines. Its 20-SOIC footprint and wide operating voltage range make retrofit into existing COP8-based designs straightforward.
When designing with this part, note that OTP programming requires a special programmer or gang programmer prior to solder; firmware cannot be updated in the field. The part is RoHS-compliant (lead-free /NOPB suffix) per the addressable manufacturing data. Programming model and peripheral registers follow the COP8 architecture reference - consult the manufacturer datasheet for the full register map, interrupt vector table, and timing diagrams before prototyping.
חלופות תחליף ישיר עבור COP8SAC720M8/NOPB — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם COP8SAC720M8/NOPB (אותו גורם צורה וטביעת רגל) — שונים ב Package, Core Architecture, MSL Level, RoHS Status, Maximum Clock Frequency.
COP8SAC720M8
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←COP8SAA720M8
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
COP8SAB720M8
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATMEGA48A-AU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATTINY44A-SSU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16F805-I/SO
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
COP8SAC720M8/NOPB דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | COP8 8-bit CISC |
| Sub-series | COP8 8SA |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 4 KB (4K x 8) |
| RAM Size | 128 x 8 bytes |
| תדר שעון מקסימלי | 10 MHz |
| Number of I/O Pins | 16 |
| Supply Voltage (VDD) | 3.3 V / 5 V |
| מארז | 20-SOIC (0.295", 7.50mm width) |
| מספר פינים | 20 |
| סוג הרכבה | Surface Mount |
| Power-On Reset (POR) | Yes (integrated) |
| Watchdog Timer | Yes (programmable) |
| Lead-Free / RoHS | Yes (/NOPB suffix) |
| Instruction Set | CISC, 8-bit |
תצורת פינים של COP8SAC720M8/NOPB
| פין 1 | L0 / G7 — Port L bit 0 / Port G bit 7 (multiplexed digital I/O) |
| פין 2 | L1 — Port L bit 1 (digital I/O) |
| פין 3 | L2 / G6 — Port L bit 2 / Port G bit 6 |
| פין 4 | L3 / G5 — Port L bit 3 / Port G bit 5 |
| פין 5 | VDD — Positive supply (3.3V or 5V) |
| פין 6 | CKI / OSCIN — Clock input / crystal oscillator input |
| פין 7 | OSCOUT — Crystal oscillator output |
| פין 8 | RESET — Active-high reset input (also has internal POR) |
| פין 9 | GND — Ground |
| פין 10 | GND — Ground |
| פין 11 | L4 — Port L bit 4 (digital I/O) |
| פין 12 | L5 — Port L bit 5 (digital I/O) |
| פין 13 | L6 — Port L bit 6 (digital I/O) |
| פין 14 | L7 — Port L bit 7 (digital I/O) |
| פין 15 | G0 — Port G bit 0 (digital I/O) |
| פין 16 | G1 — Port G bit 1 (digital I/O) |
| פין 17 | G2 — Port G bit 2 (digital I/O) |
| פין 18 | G3 — Port G bit 3 (digital I/O) |
| פין 19 | G4 / TXD — Port G bit 4 / UART transmit (peripheral-multiplexed) |
| פין 20 | RXD / INT — UART receive / external interrupt (peripheral-multiplexed) |
יישומים טיפוסיים
COP8SAC720M8/NOPB מתאים עבור 6 יישוםs: White-Goods / Washing Machine Controller, HVAC Thermostat and Climate Control, Low-End Remote Control / IR Transmitter, Industrial Sensor Readout / Data Acquisition Front-End, Appliance Timer / Delay Relay, Legacy Logic Replacement / Discrete-to-IC Consolidation.
White-Goods / Washing Machine Controller
The COP8SAC720M8/NOPB is well-matched to washing-machine, dishwasher, and microwave-oven controllers because its 16 I/O pins handle keypad input, LED indicators, relay/triac drive via optocouplers, and UART links to inverter or display boards. The 4KB OTP stores main wash-program logic, while the 128-byte RAM is adequate for state flags, timers, and a small keypad buffer. The integrated POR and programmable watchdog guarantee reliable recovery from AC brownouts common in mains-powered appliances. Its 10MHz clock is sufficient to scan keypads, drive multiplexed 7-segment displays, and execute PID motor-control loops at 10ms intervals without idle time. The 20-SOIC footprint mounts easily on a single-layer PCB for low-cost high-volume production.
מומלץ
HVAC Thermostat and Climate Control
HVAC wall thermostats benefit from the COP8SAC720M8/NOPB's compact 20-SOIC footprint and 3.3V/5V single-supply operation, simplifying power design around a small mains-to-DC adapter. Its 16 I/O support temperature I/O pins, keypad input, setpoint EEPROM emulation in OTP, and a 1-wire or UART link to a remote indoor unit. The integrated POR handles power-up cleanly after a thermostat battery replacement or brownout. The 10MHz clock runs hysteresis-based temperature loops at <1Hz, leaving cycles free for keypad debouncing and LCD refresh on a multiplexed 7-segment or character LCD. Industrial temperature grade covers the typical thermostat HVAC operating temperature range.
מומלץ
Low-End Remote Control / IR Transmitter
Remote controls for TVs, audio gear, fans, and motorized blinds map cleanly onto the COP8SAC720M8/NOPB: 16 I/O scan a 5x3 matrix, 4KB OTP stores the IR protocol table (NEC, RC5, SIRC), 128B RAM holds the most-recent command and timing markers. The 10MHz clock generates accurate 38kHz carrier and 560us / 1.69ms NEC pulse widths with <2% jitter. Integrated watchdog and POR make the COP8SAC720 robust against EMI from the IR LED driver. Low-cost OTP programming lets OEMs ship country-specific key maps at low NRE. Pair with a GPIO expander if more compact I/O expansion is needed.
מומלץ
Industrial Sensor Readout / Data Acquisition Front-End
In factory-floor sensor readouts the COP8SAC720M8/NOPB serves as a low-cost front-end digitizer: 16 I/O read 4-20mA sensors, thermocouples, or simple switch contacts, the 10MHz clock runs a 1kHz ADC sequencing loop, and 4KB OTP holds linearization polynomials plus MODBUS-RTU framing. UART transmits data to a PLC or gateway. The integrated POR holds the system in reset during ESD events common in industrial cabinets. Industrial temperature grade covers factory ambient. Its obsolete status means new designs should consider an ATmega48A-AU or STM8S003, but retrofit designs pinned to the COP8 ISA can continue to use this part during the remaining stock lifetime.
מומלץ
Appliance Timer / Delay Relay
Appliance timer modules (defrost timers, fan delay relays, oven pre-heat controllers) use the COP8SAC720M8/NOPB to count elapsed time, drive a relay or SSR, and indicate state on a few LEDs. The 10MHz clock gives 100us resolution, more than enough for appliance timing requirements in the seconds-to-hours range. 4KB OTP stores timing tables for different programs; 128B RAM holds the current state. The integrated POR and watchdog ensure the timer resumes correctly after a power glitch. Its 20-SOIC package fits compact appliance control boards with a small BOM.
מומלץ
Legacy Logic Replacement / Discrete-to-IC Consolidation
Engineers replacing dozens of 74LS logic gates, counters, and discrete timers with a single 8-bit MCU typically pick the COP8SAC720M8/NOPB because of its stable, mature toolchain and pin-compatible SO-20 footprint. It runs at 10MHz with integrated brownout handling and a programmable watchdog, eliminating the need for external reset supervisors. Typical consolidations replace 4-6 ICs (counters, gates, latches) plus discrete RC timing networks, reducing PCB area and BOM cost. Existing COP8 firmware libraries and assemblers are widely available from the long-lived COP8 ecosystem. The /NOPB suffix confirms RoHS-compliance for modern designs.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור COP8SAC720M8/NOPB — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | COP8SAC720M8 | COP8SAA720M8 | COP8SAB720M8 | ATMEGA48A-AU | ATTINY44A-SSU | PIC16F805-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 20-SOIC (0.295", 7.50mm) | 20-SOIC (0.295") - same | 20-SOIC (0.295") - same | 20-SOIC (0.295") - same | 20-SOIC - same footprint, different pin function | 20-SOIC - same footprint, different pin function | 20-SOIC - same footprint, different pin function |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 4 KB OTP | 4 KB OTP | 4 KB OTP | 4 KB OTP | 4 KB Flash (reprogrammable) | 4 KB Flash (reprogrammable) | 14 KB Flash (reprogrammable) |
| RAM Size | 128 B | 128 B | 128 B | 128 B | 512 B | 256 B | 352 B |
| Maximum Clock | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 16 | 16 | 16 | 16 | 23 | 12 | 18 |
| Core ISA | COP8 CISC 8-bit | COP8 CISC 8-bit | COP8 CISC 8-bit | COP8 CISC 8-bit | AVR RISC 8-bit | AVR RISC 8-bit | PIC16 RISC 8-bit |
| Integrated POR / Watchdog | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
| Lead-Free / RoHS | Yes (/NOPB) | No (lead-bearing base part) | Yes (NOPB variant) | Yes (NOPB variant) | Yes | Yes | Yes |
מבדילים עיקריים
- Stable mature 8-bit CISC core with extensive legacy codebase (לעומתATMEGA48A-AU)
- Integrated POR plus programmable watchdog in 20-SOIC, no external reset IC needed (לעומתPIC16F805-I/SO)
- Lead-free /NOPB variant explicitly RoHS-compliant from factory (לעומתCOP8SAC720M8 (base part, lead-bearing))
- 16 I/O pins through configurable port-L and port-G with peripheral multiplexing (לעומתATTINY44A-SSU)
הערות תכנון
The COP8SAC720M8/NOPB contains One-Time Programmable (OTP) memory that can only be programmed once - there is no in-circuit reprogramming. Engineering samples and pre-production prototypes must use the COP8SAA720M8 or COP8SAB720M8 (windowed/UV-erasable variants within the same 8SA sub-family) during code development, then transfer the verified firmware to OTP for production. Plan OTP programming into the production flow with a gang programmer or contract manufacturer.
Place a 100nF (0.1uF) ceramic decoupling capacitor as close as possible to the VDD pin (pin 5) and a 10uF bulk capacitor at the board's power entry. Connect both GND pins (9 and 10) directly to a low-impedance ground plane - do not rely on a single GND pin for high-current return paths. Use a 4-layer PCB or large ground pour on a 2-layer board for best EMI performance in mains-switching applications like white-goods controllers.
The COP8SAC720M8/NOPB operates from a single 3.3V or 5V supply. The integrated POR holds the CPU in a reset condition until VDD stabilizes above the POR threshold (~2.5V), eliminating the need for an external reset supervisor. When using the internal POR, the external RESET pin (pin 8) should be pulled up to VDD through a 10k resistor with a 100nF capacitor to ground to filter noise. Always sequence power-rails in multi-rail designs so that the COP8SAC720 VDD is stable before peripheral rails.
For crystal or ceramic-resonator clocking, keep the CKI (pin 6) and OSCOUT (pin 7) traces short (<5mm) and surrounded by ground plane to minimize EMI pickup. Place the crystal within 150mm of the MCU. If using the internal RC mode, leave the CKI/OSCOUT pins unconnected or tied to GND through a 1M resistor for noise stability. Watchdog timer should be enabled with a 1-2 second timeout to recover from software lockups in mains-noise environments.
מידע על תאימות
RoHS compliance inferred from /NOPB suffix per TI product-page conventions. REACH and conflict-minerals status not in retrieved data - verify with TI certificate of compliance. AEC-Q100 not applicable - part is industrial temperature grade, not automotive qualified.
