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STMicroelectronics M27C801-55K1
- Part No.:
- M27C801-55K1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C801-55K1.pdf
- Description:
- IC EPROM 8MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,311
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Product details
Overview
M27C801-55K1 from STMicroelectronics is an 8 Mbit (1,048,576 × 8) OTP EPROM in PLCC32 package, operating at 5 V ±10%, with 55 ns access time, 35 mA active current at 5 MHz, and 100 µA standby current. It supports two-line output control (E and GVPP), electronic signature (20h/42h), and Presto IIB programming algorithm for reliable one-time programming in industrial firmware storage.
For engineers reviewing the M27C801-55K1 datasheet, M27C801-55K1 pinout, M27C801-55K1 application, or M27C801-55K1 equivalent, key selection criteria include UV-erasable vs. OTP configuration, PLCC32 mechanical compatibility, 12.75 V programming voltage tolerance, margin-mode verify capability, and ECOPACK® lead-free compliance for legacy system requalification.
Technical Context
The M27C801-55K1 implements a TTL-compatible, single-supply EPROM architecture with dual-control read enable (E for chip select, GVPP for output gating), enabling low-power array partitioning without bus contention. Its internal logic supports margin-mode verification during programming and electronic signature readout via A9 voltage forcing (11.5–12.5 V) and A0 toggling.
It operates in five distinct modes-Read, Output Disable, Program, Program Inhibit, and Standby-each defined by specific E, GVPP, and A9 voltage states. Programming requires VCC = 6.25 V ±0.25 V and VPP = 12.75 V ±0.25 V, with 50 µs pulse width per word and full-array verify under margin conditions to ensure cell-level reliability without overprogramming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Mbit (1,048,576 × 8 bits), fixed parallel organization for direct microprocessor address/data bus interfacing |
| Access time | 55 ns max (tAVQV/tELQV), enabling compatibility with 12–18 MHz CPU buses in legacy embedded controllers |
| Supply voltage | 5 V ±10% in Read mode; 6.25 V ±0.25 V required during programming for stable threshold margin |
| Programming voltage | 12.75 V ±0.25 V on GVPP pin, strictly regulated to prevent oxide stress and ensure 100% byte-programming yield |
| Standby current | 100 µA (CMOS E high), reducing system idle power in battery-backed or energy-sensitive instrumentation |
| Electronic signature | Manufacturer code 20h (STMicroelectronics), device code 42h - used by programmers for automatic algorithm selection |
| Package | PLCC32 (K suffix), 11.43 mm × 13.97 mm body, J-lead, lead-free ECOPACK® compliant per JEDEC JESD97 |
Pinout & Package
PLCC32 (K) package: 32-lead rectangular plastic leaded chip carrier with gull-wing leads, 1.27 mm pitch, body size 11.43 mm × 13.97 mm, and integrated heat slug for thermal stability during programming pulses.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address inputs | 20-bit address bus interface; A9 used as VID input (11.5–12.5 V) during electronic signature mode |
| Q0–Q7 | Data outputs | 8-bit bidirectional data bus; outputs driven in Read/Verify; inputs latched during Programming |
| E | Chip Enable | Active-low primary device select; CMOS-high (VIH > VCC – 0.2 V) places device in 100 µA standby |
| GVPP | Output Enable / Program Supply | Active-low output gate in Read; 12.75 V programming supply input during Program mode |
| VCC | Power supply | 5 V ±10% for Read; 6.25 V ±0.25 V required during Programming to maintain cell margin |
| VSS | Ground | Reference return for all DC and AC timing; decoupling requires 0.1 µF ceramic capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + GVPP) | Eliminates bus contention in multi-device memory arrays by independently managing chip selection and output drive |
| Presto IIB programming algorithm | Guarantees full-array programming with verified margin in ≤52.5 s using 50 µs pulses and margin-mode verify - no overprogram cycles needed |
| Electronic signature (20h/42h) | Enables automated programmer recognition and algorithm matching without manual part number entry or configuration |
| ECOPACK® lead-free packaging | Meets RoHS and JEDEC JESD97 interconnect category labeling requirements; compatible with standard Pb-free reflow profiles |
| Margin-mode verify | Validates programmed cells at reduced VCC (4.2 V and 6.0 V) to confirm retention margin before system deployment |
Applications
| Industrial PLC Firmware Storage | Avionics Boot ROM |
|---|---|
Use Scenario: Storing immutable boot code and safety-critical control logic in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile instruction store mapped to CPU reset vector; accessed during cold start with deterministic 55 ns latency. Use Value: OTP configuration prevents accidental overwrite; PLCC32 allows socketed field replacement; 100 µA standby minimizes backup battery drain during power loss. | Use Scenario: Holding certified flight software initialization routines in airborne computing modules where reprogramming is prohibited after qualification. IC Role / Device Role / Timing Role: Fixed-function ROM providing verified startup instructions to PowerPC or ARM-based avionics processors. Use Value: Electronic signature (20h/42h) enables automated traceability during DO-254 toolchain validation; ECOPACK® ensures compliance with aerospace material directives. |
| Medical Device Calibration Data | Test Equipment Pattern Memory |
Use Scenario: Retaining factory-calibrated sensor coefficients and diagnostic lookup tables in Class II medical analyzers requiring long-term data integrity. IC Role / Device Role / Timing Role: Static data repository accessed only during device power-up or service mode; no runtime writes permitted. Use Value: OTP permanence eliminates risk of EEPROM wear-out or flash corruption; 55 ns access supports real-time calibration loading within 100 µs of wake-up. | Use Scenario: Storing fixed digital stimulus patterns in automated test equipment (ATE) for semiconductor wafer probing and functional verification. IC Role / Device Role / Timing Role: High-speed pattern source synchronized to tester clock; Q0–Q7 drives parallel DUT interface with precise setup/hold timing. Use Value: 35 mA active current at 5 MHz enables sustained burst reads without thermal throttling; PLCC32 footprint simplifies socket-based board-level repair. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C801-55DC | Same 8 Mbit × 8 OTP architecture, 55 ns access, but uses PDIP32 package and requires 12.5 V ±0.5 V programming voltage | No PLCC32 footprint; lacks ECOPACK® labeling and JESD97 interconnect category marking | Select when through-hole assembly or legacy socket compatibility is required; not suitable for surface-mount rework scenarios |
| MX27C801-55PC | Pin-compatible PLCC32 OTP EPROM, but specifies 12.0 V ±0.5 V programming voltage and 40 mA active current at 5 MHz | Margin-mode verify not documented; electronic signature codes differ (manufacturer 01h, device 42h) | Use only if existing programming hardware supports 12.0 V VPP and signature verification is not required in production test flow |
Compared with AM27C801-55DC and MX27C801-55PC, the M27C801-55K1 uniquely combines PLCC32 surface-mount compatibility, ECOPACK® compliance, 12.75 V precision programming voltage, and standardized ST signature codes - making it the sole choice for RoHS-compliant, socket-replaceable OTP firmware storage in qualified industrial designs.
Availability
M27C801-55K1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, avionics boot ROM, and medical device calibration data applications requiring stable component supply across extended product lifecycles.
Supply support for M27C801-55K1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering automotive, industrial, and power discrete solutions with emphasis on reliability and longevity.
The M27C801 belongs to ST's legacy EPROM product line, designed specifically for cost-sensitive, high-reliability firmware and calibration storage in systems where field updates are unnecessary and long-term bit retention is mandatory.
FAQ
Is M27C801-55K1 UV-erasable or one-time programmable?
The M27C801-55K1 is an OTP (one-time programmable) variant, packaged in PLCC32 without a quartz window. Unlike the FDIP32W UV-erasable version, it cannot be erased - programming is permanent. This is confirmed by ST's ordering scheme: 'K' suffix denotes PLCC32 OTP, while 'F' denotes ceramic windowed UV EPROM.
What is the correct programming voltage and sequence for M27C801-55K1?
M27C801-55K1 requires VCC = 6.25 V ±0.25 V and VPP = 12.75 V ±0.25 V applied simultaneously (VCC before or with VPP). Programming uses 50 µs pulses on E while data is latched on Q0–Q7. The Presto IIB algorithm mandates margin-mode verify at 4.2 V and 6.0 V VCC to confirm cell threshold stability.
Can M27C801-55K1 be used in place of a UV EPROM like M27C801-55F1?
No - M27C801-55K1 is OTP-only and lacks UV erasure capability. While pinout and AC timing match, substituting it for a UV EPROM breaks reprogrammability in development systems. The FDIP32W (F) package has a quartz window; PLCC32 (K) does not. Mechanical and thermal profiles also differ significantly.
Does M27C801-55K1 support standard TTL or CMOS logic levels on control pins?
M27C801-55K1 accepts TTL-compatible inputs: VIL ≤ 0.8 V, VIH ≥ 2.0 V for E and GVPP in Read mode. However, during programming, GVPP must be driven to 12.75 V, and A9 requires 11.5–12.5 V for electronic signature - both exceeding TTL/CMOS voltage ranges and necessitating dedicated level-shifting circuitry.
M27C801-55K1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.35x13.89)
M27C801-55K1 FAQ
1.How can I place an order for M27C801-55K1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C801-55K1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for M27C801-55K1 reliable?
The price and inventory of M27C801-55K1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C801-55K1 is usually 5 days.
3.What payment methods are accepted for M27C801-55K1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C801-55K1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C801-55K1?
M27C801-55K1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C801-55K1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for M27C801-55K1?
For technical support, including M27C801-55K1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C801-55K1 requirements.
6.How does Aetrix verify that M27C801-55K1 is sourced from the original manufacturer or authorized distributors?
All M27C801-55K1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M27C801-55K1 meets industry standards.
7.What is the process for return or replacement of M27C801-55K1?
All M27C801-55K1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C801-55K1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The M27C801-55K1 part is unused and in its original packaging.
Return procedure for M27C801-55K1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C801-55K1 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT24CS02-SSHM-T
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