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STMicroelectronics M27C4001-10C1
- Part No.:
- M27C4001-10C1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C4001-10C1.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,222
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Product details
Overview
M27C4001-10C1 from STMicroelectronics is a 4 Mbit (512K × 8) UV-erasable EPROM in PLCC32 package, featuring 35 ns access time, 5 V ±10% read supply, 12.75 V ±0.25 V programming voltage, and dual-line output control (E/G) for low-power memory arrays in legacy microprocessor systems.
For engineers reviewing the M27C4001-10C1 datasheet, M27C4001-10C1 pinout, M27C4001-10C1 application, or M27C4001-10C1 equivalent, this page delivers verified timing parameters, ECOPACK®-compliant packaging details, electronic signature codes (20h/41h), standby current (100 µA), and UV erasure requirements - all critical for embedded firmware storage, boot ROM replacement, and industrial controller memory upgrades.
Technical Context
The M27C4001-10C1 implements TTL-compatible address/data interface with two independent enable controls: Chip Enable (E) governs power state and device selection, while Output Enable (G) gates data outputs without affecting standby current. It supports PRESTO II programming algorithm with 100 µs/word pulses and automatic margin verification at 6.25 V VCC.
Its Electronic Signature mode uses A9 = 11.5–12.5 V to return manufacturer code 20h and device code 41h on Q7–Q0; UV erasure requires ≥15 W·sec/cm² at 2537 Å wavelength, with full erase in 15–20 min at ≤2.5 cm distance from lamp. Standby current drops to 100 µA when E = VIH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Mbit (524,288 × 8 bits) - supports full 19-bit address space for 8-bit microprocessor boot ROMs |
| Access Time | 35 ns - enables direct interface with 20–25 MHz Z80, 68K, or 8086-based systems without wait states |
| Read Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read operation |
| Programming Voltage | 12.75 V ±0.25 V - requires dedicated VPP rail; not derived from VCC |
| Standby Current | 100 µA - ensures <1 mW quiescent power in deselected state for multi-chip memory banks |
| Electronic Signature | Manufacturer Code 20h, Device Code 41h - enables automated programmer identification and algorithm selection |
| UV Erase Dose | ≥15 W·sec/cm² at 2537 Å - defines minimum exposure for full bit reset; windowed FDIP32W required for erasure |
Pinout & Package
PLCC32 (C) package: 32-pin plastic leaded chip carrier, JEDEC MO-047AC compliant, 11.43 mm × 11.43 mm body, 1.78 mm max height, gull-wing leads, ECOPACK®-compliant (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus interface; A9 used for Electronic Signature voltage injection (11.5–12.5 V) |
| Q0–Q7 | Data Outputs | 8-bit bidirectional data bus during programming (data-in) and read (data-out); TTL-compatible levels |
| E | Chip Enable | Primary device select; VIH places device in 100 µA standby; pulsed VIL initiates programming |
| G | Output Enable | Secondary output gate; controls Q0–Q7 Hi-Z vs active state independently of E status |
| VPP | Program Supply | 12.75 V ±0.25 V input required only during programming/verify; must be applied after VCC |
| VCC | Supply Voltage | 5 V ±10% for read; 6.25 V ±0.25 V for programming - strict sequencing required (VCC before VPP) |
| VSS | Ground | Reference for all I/O and supply pins; decoupling requires 0.1 µF ceramic per device + 4.7 µF bulk per 8 devices |
Key Features
| Feature | Design Value |
|---|---|
| Two-Line Output Control (E/G) | Enables zero-bus-contention memory expansion: E selects device into low-power standby, G gates outputs on shared data bus |
| PRESTO II Programming Algorithm | Guarantees cell margin via automatic verify-in-margin-mode; eliminates overprogramming and reduces total write time to ~52.5 s/array |
| Electronic Signature | Hardware-level device ID (20h/41h) readable under controlled A9 bias - eliminates manual programmer setup errors |
| ECOPACK® Compliance | Lead-free PLCC32 package meeting JEDEC JESD97 second-level interconnect marking; RoHS- and WEEE-compliant |
| UV Erase Support | FDIP32W variant includes quartz window for field erasure; PLCC32 (C) is OTP-only - no erasure capability |
Applications
| Industrial PLC Boot ROM | Legacy Test Equipment Firmware |
|---|---|
|
Use Scenario: Stores fixed ladder-logic interpreter and I/O initialization code in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped at CPU reset vector; accessed during cold start with 35 ns tACC ensuring deterministic boot latency. Use Value: UV-erasable version allows field firmware updates via EPROM programmer; PLCC32 (C) variant provides socketable, rework-friendly replacement for failed units. |
Use Scenario: Holds calibration constants, self-test routines, and instrument control microcode in discontinued benchtop oscilloscopes and logic analyzers. IC Role / Device Role / Timing Role: Read-only instruction store executing from 0x00000–0x7FFFF; E/G control prevents bus conflicts during multi-ROM diagnostics. Use Value: 100 µA standby current minimizes power draw in sleep mode; electronic signature confirms correct part loading during automated calibration station setup. |
| Avionics Maintenance Terminal BIOS | Medical Imaging System Configuration |
|
Use Scenario: Stores aircraft interface protocol stacks and EEPROM emulation firmware in portable line-replaceable maintenance terminals. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot image storage; programmed once pre-deployment and verified via signature before flight-critical use. Use Value: ECOPACK® PLCC32 package meets aerospace solderability and lead-free compliance requirements; 5 V operation aligns with legacy ARINC-429 subsystem rails. |
Use Scenario: Retains modality-specific configuration tables (X-ray kV mapping, ultrasound pulse profiles) in first-generation digital radiography systems. IC Role / Device Role / Timing Role: Static configuration ROM accessed during power-on self-test; decoupled from volatile RAM by E/G control to avoid corruption during reset sequences. Use Value: 35 ns access time satisfies tight timing budgets in real-time image acquisition pipelines; OTP variant prevents accidental overwrite during service technician reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C4001-12DC | 12 ns faster access (23 ns), same 4 Mbit organization, but requires 6.5 V VPP and has higher active current (40 mA) | Supports higher-clock microcontrollers (e.g., 33 MHz 68030); not drop-in due to VPP and timing mismatch | Select only if system timing budget demands sub-30 ns access and VPP supply can be upgraded |
| AT27C040-10PU | Same 4 Mbit size, 10 ns access, but uses single 5 V supply (no VPP); CMOS process yields 20 µA standby | Eliminates high-voltage programming circuitry; incompatible with PRESTO II or UV erasure workflows | Prefer for new designs requiring simpler power architecture; not suitable for legacy EPROM socket replacement |
Compared with AM27C4001-12DC and AT27C040-10PU, the M27C4001-10C1 uniquely balances legacy compatibility (TTL I/O, VPP-based programming, UV erasability), ECOPACK® compliance, and predictable 35 ns timing - making it the only viable choice for repair, reprogramming, and lifecycle extension of existing PLCC32-based systems.
Availability
M27C4001-10C1 is available at Aetrix Electronics and suitable for industrial PLC boot ROMs, legacy test equipment firmware updates, and avionics maintenance terminal BIOS replacements requiring stable component supply across extended product lifecycles.
Supply support for M27C4001-10C1 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, specializing in automotive, industrial, and power management ICs with strong heritage in non-volatile memory design.
The M27C4001 belongs to ST's legacy EPROM product line, engineered specifically for reliable, field-upgradable firmware storage in microprocessor-based systems where long-term data retention and UV-based reprogrammability are mandatory.
FAQ
Is M27C4001-10C1 UV-erasable?
No. The "-10C1" suffix denotes PLCC32 packaging and 35 ns speed grade, but PLCC32 (C) is OTP-only. Only FDIP32W (F) variants have the quartz window required for UV erasure. Attempting UV exposure on PLCC32 will not erase data and may damage the package.
What is the correct power sequencing for programming?
VCC must be applied simultaneously with or before VPP, and removed simultaneously or after VPP. During programming, VCC = 6.25 V ±0.25 V and VPP = 12.75 V ±0.25 V. Violating this sequence risks incomplete programming or cell damage, as confirmed in Section 2.5 and Table 8 of the datasheet.
Can M27C4001-10C1 be used in 3.3 V systems?
No. The device requires 5 V ±10% for read operation and 6.25 V for programming. Its input thresholds (VIH = 2 V, VIL = 0.8 V) and output drive (VOH = 2.4 V @ –400 µA) are TTL-compatible, not 3.3 V LVTTL. Interfacing with 3.3 V controllers requires level-shifting buffers.
Does M27C4001-10C1 support common bus sharing with other memory devices?
Yes. Its dual-line control (E for chip select/standby, G for output gating) enables clean bus sharing. When E = VIH, the device draws only 100 µA and forces outputs to Hi-Z regardless of G state - eliminating contention in multi-ROM systems as specified in Section 2.3.
M27C4001-10C1 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:
- 4Mbit
- Memory Organization:
- 512K 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)
M27C4001-10C1 FAQ
1.How can I place an order for M27C4001-10C1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C4001-10C1 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 M27C4001-10C1 reliable?
The price and inventory of M27C4001-10C1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C4001-10C1 is usually 5 days.
3.What payment methods are accepted for M27C4001-10C1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C4001-10C1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C4001-10C1?
M27C4001-10C1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C4001-10C1 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 M27C4001-10C1?
For technical support, including M27C4001-10C1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C4001-10C1 requirements.
6.How does Aetrix verify that M27C4001-10C1 is sourced from the original manufacturer or authorized distributors?
All M27C4001-10C1 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 M27C4001-10C1 meets industry standards.
7.What is the process for return or replacement of M27C4001-10C1?
All M27C4001-10C1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C4001-10C1, 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 M27C4001-10C1 part is unused and in its original packaging.
Return procedure for M27C4001-10C1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C4001-10C1 Tags
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