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STMicroelectronics M27C801-100K1
- Part No.:
- M27C801-100K1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C801-100K1.pdf
- Description:
- IC EPROM 8MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,582
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Product details
Overview
M27C801-100K1 from STMicroelectronics is an 8 Mbit (1,048,576 × 8) OTP EPROM in PLCC32 package, operating at 5 V ±10%, with 100 ns access time, 35 mA active current, and 100 µA standby current. It supports two-line output control (E and GVPP), electronic signature (20h/42h), and Presto IIB programming at 12.75 V with 50 µs/word pulse width - used in legacy industrial controller firmware storage where one-time programmability and UV-erasable alternatives are not required.
For engineers reviewing the M27C801-100K1 datasheet, M27C801-100K1 pinout, M27C801-100K1 application, or M27C801-100K1 equivalent, this page delivers verified functional identity, PLCC32 terminal mapping, read/standby/programming timing values, electronic signature protocol, and direct substitution guidance for legacy memory replacement in embedded systems with fixed firmware images.
Technical Context
The M27C801-100K1 implements a TTL-compatible, single-supply EPROM architecture with dual control lines: Chip Enable (E) for device selection and GVPP serving as Output Enable during read mode or programming voltage input during write mode. Its logic diagram confirms full address decoding across A0–A19 and parallel 8-bit data I/O on Q0–Q7.
It operates in four distinct modes defined by E and GVPP states: Read (E=VIL, GVPP=VIL), Output Disable (E=VIL, GVPP=VIH), Program (E=pulsed VIL, GVPP=VPP=12.75 V), and Standby (E=VIH). Margin Mode activation via 11.5–12.5 V on A9 enables electronic signature readout and reliability margin verification without overprogramming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Mbit (1,048,576 × 8 organization) - supports full 20-bit addressing for legacy 8-bit microcontroller systems |
| Access Time | 100 ns - defines maximum clock rate compatibility with 8051, Z80, and 68K-based controllers |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no separate VPP required during read |
| Active Current | 35 mA at 5 MHz - determines decoupling capacitor sizing (0.1 µF ceramic per device) |
| Standby Current | 100 µA - enables low-power retention in battery-backed or intermittent operation systems |
| Programming Voltage | 12.75 V ±0.25 V - requires dedicated HV supply; not derived from VCC |
| Programming Time | 50 µs per word - enables full array programming in ~52.5 s using Presto IIB algorithm |
| Electronic Signature | Manufacturer code 20h, Device code 42h - enables automatic algorithm selection in ST-compatible programmers |
Pinout & Package
Package: PLCC32 (plastic leaded chip carrier, 32-pin, J-lead, 11.43 mm × 13.97 mm body, JEDEC MO-047AC compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit address bus interface; latched internally on E transition - supports full 1 MB address space |
| Q0–Q7 | Data Outputs / Programming Inputs | Bidirectional: outputs during read, inputs during programming - eliminates need for external data bus transceivers |
| E | Chip Enable | Primary device select; CMOS/TTL-compatible active-low signal - controls power state and output enable |
| GVPP | Output Enable / Programming Supply | Dual-function pin: low = output enabled (read), high = 12.75 V applied (program) - simplifies PCB routing vs. separate OE/VPP pins |
| VCC | Power Supply | +5 V supply for logic and memory array - must be applied before/with VPP and removed after VPP |
| VSS | Ground | Reference return for all signals - requires low-inductance 0.1 µF ceramic decoupling adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + GVPP) | Eliminates bus contention in multi-chip memory arrays by enabling independent device selection and output gating |
| Presto IIB programming algorithm | Guarantees sufficient programming margin without overpulse - improves long-term data retention reliability |
| Electronic signature (20h/42h) | Enables auto-detection and algorithm matching in STMicroelectronics-compatible programmers (e.g., Data I/O PS-200) |
| ECOPACK® compliance | Lead-free PLCC32 package meeting JEDEC JESD97 marking requirements - supports RoHS-compliant legacy system rework |
| Margin Mode capability | Allows verification of programmed cell threshold margins at reduced VCC (4.2 V/6 V) - detects marginal writes pre-deployment |
Applications
| Industrial PLC Firmware Storage | Legacy Test Equipment Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic firmware in DIN-rail mounted programmable logic controllers with no field update requirement. IC Role / Device Role / Timing Role: Non-volatile program memory mapped to CPU address space; accessed synchronously with 100 ns timing window. Use Value: Eliminates need for UV erasure infrastructure while ensuring bit-level reliability over 10+ year deployments in temperature-stable enclosures. | Use Scenario: Holding boot code and calibration constants in automated test systems (e.g., semiconductor ATE) where firmware rarely changes. IC Role / Device Role / Timing Role: Primary boot ROM executing on power-up; timing-critical read access synchronized to system clock edge. Use Value: Guarantees deterministic startup sequence with zero risk of accidental erasure from ambient fluorescent lighting. |
| Avionics Maintenance Terminal BIOS | Medical Imaging System Configuration PROM |
Use Scenario: Storing diagnostic BIOS and hardware initialization routines in FAA-certified maintenance laptops used on aircraft ramp. IC Role / Device Role / Timing Role: Static configuration memory accessed during cold start; no runtime writes. Use Value: Meets DO-254 design assurance level DAL-C for unchangeable firmware with verified 100 ns timing margins under extended temperature range. | Use Scenario: Holding sensor calibration tables and safety-critical boot parameters in FDA-cleared MRI subsystem controllers. IC Role / Device Role / Timing Role: Read-only configuration store accessed once per power cycle; immune to electromagnetic interference-induced corruption. Use Value: Provides tamper-proof, non-reprogrammable storage validated for IEC 62304 Class C software components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C801-100DC | Same 8 Mbit × 8 OTP EPROM, 100 ns access, but in PDIP32 package with different pin 1 marking and thermal profile | Requires socket redesign and manual soldering rework due to through-hole vs. surface-mount PLCC footprint | Select only if existing PCB uses PDIP32 sockets and UV shielding is unnecessary |
| AT27C040-10PU | 4 Mbit (512K × 8) OTP EPROM, 100 ns, same PLCC32 package but lacks Presto IIB algorithm and Margin Mode | Half capacity limits use to smaller firmware images; no electronic signature or margin verify capability | Acceptable only when firmware size ≤ 4 Mbit and programmer does not require auto-algorithm detection |
Compared with AM27C801-100DC and AT27C040-10PU, the M27C801-100K1 uniquely combines full 8 Mbit density, PLCC32 surface-mount compatibility, Presto IIB programming margin assurance, and ST-specific electronic signature - making it irreplaceable for legacy designs requiring guaranteed write reliability and automated programming validation.
Availability
M27C801-100K1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy test equipment boot ROM, avionics maintenance terminal BIOS, and medical imaging system configuration PROM requiring stable component supply across extended product lifecycles.
Supply support for M27C801-100K1 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, designing and manufacturing microcontrollers, memory, analog, and power devices for industrial, automotive, and consumer markets.
The M27C801 belongs to ST's legacy EPROM product line, engineered specifically for cost-sensitive, high-reliability embedded systems requiring one-time programmable non-volatile storage without UV erasure infrastructure.
FAQ
Is M27C801-100K1 UV-erasable?
No. The 'K1' suffix denotes PLCC32 packaging and OTP (one-time programmable) configuration. Unlike the FDIP32W ('F') variant with a quartz window, the K1 has no UV-transparent lid and cannot be erased. Programming is permanent after initial write.
What is the function of the GVPP pin during read mode?
During read mode, GVPP serves as Output Enable (OE): when held low (VIL), it enables Q0–Q7 outputs; when high (VIH), outputs go high-impedance. This allows shared data bus operation without external tri-state logic.
Can M27C801-100K1 be programmed with standard 5 V supply?
No. Programming requires 12.75 V ±0.25 V applied to GVPP, and VCC must be raised to 6.25 V ±0.25 V during write cycles. A dedicated high-voltage programming supply and voltage-controlled sequencing are mandatory.
Does M27C801-100K1 support JEDEC-standard electronic signature?
Yes. Applying 11.5–12.5 V to A9 while toggling A0 reads manufacturer code 20h (STMicroelectronics) on Q7–Q0 at A0=VIL, and device code 42h at A0=VIH - fully compliant with JEDEC Standard JESD68 for EPROM identification.
M27C801-100K1 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:
- 100 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)
M27C801-100K1 FAQ
1.How can I place an order for M27C801-100K1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C801-100K1 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 M27C801-100K1 reliable?
The price and inventory of M27C801-100K1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C801-100K1 is usually 5 days.
3.What payment methods are accepted for M27C801-100K1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C801-100K1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C801-100K1?
M27C801-100K1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C801-100K1 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 M27C801-100K1?
For technical support, including M27C801-100K1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C801-100K1 requirements.
6.How does Aetrix verify that M27C801-100K1 is sourced from the original manufacturer or authorized distributors?
All M27C801-100K1 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 M27C801-100K1 meets industry standards.
7.What is the process for return or replacement of M27C801-100K1?
All M27C801-100K1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C801-100K1, 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 M27C801-100K1 part is unused and in its original packaging.
Return procedure for M27C801-100K1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C801-100K1 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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