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STMicroelectronics M27C801-100B1
- Part No.:
- M27C801-100B1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
M27C801-100B1.pdf
- Description:
- IC EPROM 8MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,942
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Product details
Overview
M27C801-100B1 from STMicroelectronics is an 8 Mbit (1,048,576 × 8) OTP EPROM in a 32-pin plastic DIP (PDIP32) 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 and boot memory for microcontroller-based systems.
For engineers reviewing the M27C801-100B1 datasheet, M27C801-100B1 pinout, M27C801-100B1 application, or M27C801-100B1 equivalent, this page delivers verified timing parameters, real-world UV/OTP functional distinction, PDIP32 mechanical compatibility, and precise programming voltage and signature code validation required for legacy system requalification and BOM continuity planning.
Technical Context
The M27C801-100B1 implements TTL-compatible address/data interface with dual control lines: Chip Enable (E) for device selection and GVPP as combined Output Enable / programming supply input. Its read mode requires both E and GVPP low to drive Q0–Q7 outputs, while standby mode activates on CMOS-high E, forcing outputs to high-impedance and reducing ICC to 100 µA.
Programming operates at VCC = 6.25 V ±0.25 V and VPP = 12.75 V ±0.25 V, using 50 µs pulses per byte with internal margin-mode verification; electronic signature reads manufacturer code 20h and device code 42h via A9 = 12 V and A0 toggling - all confirmed under 25°C ±5°C ambient per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Mbit (1,048,576 × 8 bits), fixed parallel organization - no address multiplexing, direct byte-wide data bus interface |
| Access time | 100 ns max (tAVQV/tELQV), defines minimum clock cycle for reliable read in 10 MHz synchronous systems |
| Supply voltage (Read) | 5 V ±10% - compatible with standard TTL/CMOS logic rails without regulation overhead |
| Active current | 35 mA at 5 MHz - determines decoupling requirement: 0.1 µF ceramic per device + 4.7 µF bulk cap per 8 devices |
| Standby current | 100 µA - enables low-power hold state during processor idle cycles in embedded controllers |
| Programming voltage | 12.75 V ±0.25 V on GVPP pin - requires dedicated HV supply rail, not derived from VCC |
| Electronic signature | Manufacturer code 20h, Device code 42h - enables automatic algorithm selection in ST-certified programmers |
Pinout & Package
Package: PDIP32 (Plastic Dual In-line Package, 600 mil width, 0.1 inch lead pitch), RoHS-compliant ECOPACK® variant with lead-free terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address inputs | 20-bit address bus supporting full 1 Mbyte addressing; no multiplexing - simplifies glue logic in 8051/Z80-based systems |
| Q0–Q7 | Data outputs | True TTL-compatible bidirectional data bus; outputs driven only when E and GVPP are low |
| E | Chip Enable | Primary device select; CMOS-high (≥VCC–0.2 V) forces standby mode and high-Z outputs |
| GVPP | Output Enable / Program Supply | Low = output enable during read; 12.75 V = programming mode activation - single pin serves dual function |
| VCC | Power supply | 5 V ±10% input; must be applied before/with VPP and removed after VPP to prevent latch-up |
| VSS | Ground | Reference return for all signals; requires local 0.1 µF decoupling capacitor placement |
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 cell margin with 50 µs pulses and margin-mode verify - no overprogramming, 52.5 s full-array write time |
| Electronic signature (20h/42h) | Enables auto-detection and algorithm matching in STMicroelectronics-certified programmers - prevents incorrect programming |
| ECOPACK® packaging | Lead-free PDIP32 compliant with JEDEC JESD97 second-level interconnect marking - meets industrial RoHS requirements |
| 100 µA standby current | Reduces system-level quiescent power by >99% vs active mode - critical for battery-backed controller retention |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot Memory |
|---|---|
Use Scenario: Storing fixed ladder logic firmware in programmable logic controllers where field updates are rare and long-term bit retention is mandatory. IC Role / Device Role / Timing Role: Non-volatile boot ROM providing instruction fetch to Z80 or 8051 derivatives at power-on reset. Use Value: 100 ns access time ensures zero-wait-state execution at 10 MHz CPU clock; OTP configuration prevents accidental overwrite during maintenance. | Use Scenario: Holding immutable BIOS or bootloader code in medical diagnostic equipment manufactured pre-2010. IC Role / Device Role / Timing Role: Parallel-addressed memory mapped at 0x0000–0x0FFFF, accessed via dedicated address/data bus. Use Value: Electronic signature (20h/42h) validates correct device insertion during automated test; ECOPACK® compliance satisfies IEC 60601-1 traceability. |
| Avionics Maintenance Interface | Test Equipment Configuration PROM |
Use Scenario: Storing calibration constants and self-test routines in FAA-certified flight line test sets. IC Role / Device Role / Timing Role: Read-only configuration store accessed during power-up initialization sequence. Use Value: 100 µA standby current extends battery life in portable units; PDIP32 footprint allows direct replacement of obsolete 27C800 variants. | Use Scenario: Holding instrument-specific setup tables in benchtop oscilloscopes and signal generators. IC Role / Device Role / Timing Role: Static memory holding FPGA configuration headers and analog front-end trim values. Use Value: Two-line control (E/GVPP) isolates PROM from shared data bus during FPGA reconfiguration - prevents bus contention faults. |
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 architecture, 100 ns access, but uses 12.5 V ±0.5 V programming voltage and different electronic signature (01h/42h) | Requires updated programmer algorithm; pinout identical but signature mismatch blocks auto-detection in ST tools | Select only if existing AMI-based programming infrastructure is in place and ST tool compatibility is not required |
| MX27C801-10PC | 100 ns access, 5 V read, but specifies 12.5 V programming and lacks Presto IIB margin-mode verify - relies on external verify cycles | No built-in margin guarantee; higher risk of marginal writes in temperature-varying environments | Acceptable for cost-sensitive replacements where full ST qualification is waived and manual verify steps are added |
Compared with AM27C801-100DC and MX27C801-10PC, the M27C801-100B1 provides guaranteed programming margin via Presto IIB, native ST tool support through electronic signature 20h/42h, and tighter VPP tolerance (±0.25 V), making it the sole choice for requalifying legacy ST-designed systems requiring zero-field-failure reliability.
Availability
M27C801-100B1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot memory, and avionics maintenance interface applications requiring stable component supply across extended product lifecycles.
Supply support for M27C801-100B1 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, specializing in automotive, industrial, and power discrete solutions with strong legacy IP in non-volatile memory.
The M27C801 belongs to ST's mature EPROM product line designed specifically for long-lifecycle industrial and aerospace applications where firmware immutability, UV/OTP flexibility, and multi-decade data retention are mandatory.
FAQ
Is M27C801-100B1 UV-erasable or one-time programmable?
The M27C801-100B1 is an OTP (One-Time Programmable) variant, packaged in PDIP32 without a quartz window. Unlike UV-erasable FDIP32W versions, it cannot be erased - programming is permanent after initial write. This is confirmed by ST's ordering code suffix 'B1', which maps to plastic DIP OTP configuration per Table 15 of the datasheet.
What is the exact meaning of '100' in M27C801-100B1?
The '100' denotes 100 ns maximum access time (tAVQV and tELQV) under standard AC measurement conditions (input rise/fall ≤20 ns, VCC = 5 V ±10%, TA = 0–70°C). This is distinct from -90 (90 ns) and -80 (80 ns) speed grades and directly impacts maximum supported CPU bus frequency in legacy designs.
Can M27C801-100B1 be programmed with a standard 5 V supply?
No. Programming requires VPP = 12.75 V ±0.25 V applied to the GVPP pin, while VCC must be set to 6.25 V ±0.25 V - not 5 V. Applying 5 V to GVPP will not initiate programming; incorrect voltage violates Table 8 DC characteristics and risks incomplete writes or cell damage.
Does M27C801-100B1 support common memory bus protocols like SPI or I²C?
No. The M27C801-100B1 is a parallel-addressed, asynchronous EPROM with 20 address lines (A0–A19) and 8 data lines (Q0–Q7). It has no serial interface logic, clock input, or protocol engine - communication occurs solely via TTL-level address/data strobes (E and GVPP), per Figures 2 and 7 in the datasheet.
M27C801-100B1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- Through Hole
- Supplier Device Package:
- 32-PDIP
M27C801-100B1 FAQ
1.How can I place an order for M27C801-100B1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C801-100B1 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 M27C801-100B1 reliable?
The price and inventory of M27C801-100B1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C801-100B1 is usually 5 days.
3.What payment methods are accepted for M27C801-100B1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C801-100B1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C801-100B1?
M27C801-100B1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C801-100B1 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 M27C801-100B1?
For technical support, including M27C801-100B1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C801-100B1 requirements.
6.How does Aetrix verify that M27C801-100B1 is sourced from the original manufacturer or authorized distributors?
All M27C801-100B1 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 M27C801-100B1 meets industry standards.
7.What is the process for return or replacement of M27C801-100B1?
All M27C801-100B1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C801-100B1, 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 M27C801-100B1 part is unused and in its original packaging.
Return procedure for M27C801-100B1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C801-100B1 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
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