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STMicroelectronics M27C4002-80C6
- Part No.:
- M27C4002-80C6
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
M27C4002-80C6.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,726
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Product details
Overview
M27C4002-80C6 from STMicroelectronics is a 4 Mbit (256K × 16) UV-erasable EPROM in PDIP40 package, operating at 5V ±10%, with 45 ns access time, 70 mA active current at 10 MHz, and 100 µA standby current - used for firmware storage in legacy microprocessor systems requiring nonvolatile, field-erasable program memory.
For engineers reviewing the M27C4002-80C6 datasheet, M27C4002-80C6 pinout, M27C4002-80C6 application, or M27C4002-80C6 equivalent, key selection criteria include UV erasability, two-line output control (E/G), 12.75 V programming voltage, PRESTO II algorithm support, and compatibility with TTL-level address/data buses in embedded boot memory designs.
Technical Context
The M27C4002-80C6 implements a parallel-addressed, asynchronous EPROM architecture with dual active-low control: Chip Enable (E) governs power state and device selection, while Output Enable (G) independently gates data onto Q0–Q15 outputs. It supports read, standby, programming, verify, and electronic signature modes - all defined by specific voltage and timing conditions on E, G, VPP, and A9.
Its PRESTO II programming algorithm applies 100 µs pulses per word with automatic margin verification at 6.25 V VCC and 12.75 V VPP; erasure requires UV exposure (2537 Å, ≥15 W·sec/cm²) through the windowless PDIP40 package's ceramic frit-seal variant - though the -80C6 suffix denotes the plastic DIP version without UV window, confirming OTP-only use per ST's ordering scheme.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Mbit (256K words × 16 bits) - supports 16-bit data bus microprocessor interfaces without byte-lane splitting. |
| Access Time | 45 ns - enables direct connection to 22 MHz CPU buses with no wait states in standard read cycles. |
| VCC Supply | 5 V ±10% - compatible with legacy TTL/CMOS logic rails; no separate I/O voltage required. |
| Active Current | 70 mA at 10 MHz - defines decoupling requirement: 0.1 µF ceramic cap per device + 4.7 µF bulk cap per 8 devices. |
| Standby Current | 100 µA - achieved when E = VIH; ensures low-power retention during processor idle periods. |
| Programming Voltage | 12.75 V ±0.25 V on VPP - requires dedicated high-voltage supply; incompatible with standard 5 V system rails. |
| Electronic Signature | Manufacturer Code 20h, Device Code 44h - enables automated programmer identification via A9=11.5–12.5 V pulse and A0 toggle. |
Pinout & Package
Package: PDIP40 (Plastic Dual In-line Package, 600 mil width), RoHS-compliant ECOPACK® lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word decode; A16/A17 used only in extended addressing modes. |
| Q0–Q15 | Data Outputs | 16-bit bidirectional data bus - outputs valid only when E=VIL and G=VIL; high-impedance otherwise. |
| E | Chip Enable | Primary device select; VIH places device in standby (100 µA), VIL enables read/program operations. |
| G | Output Enable | Secondary output gate; controls Q0–Q15 drive independent of E - enables multi-chip bus sharing. |
| VPP | Program Supply | 12.75 V input required only during programming/verify; must be applied after VCC and removed before VCC. |
| VCC | Supply Voltage | 5 V ±10% for read/standby; 6.25 V ±0.25 V required during programming - mandates voltage switching circuitry. |
| VSS | Ground | Two dedicated ground pins (pins 12 and 27) - reduce noise coupling and improve signal integrity in high-speed reads. |
| NC | No Connect | Pins 23 and 34 are internally unconnected - must remain floating or tied to ground per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + G) | Enables zero-bus-contention memory arrays: deselected chips enter standby (100 µA), while selected chip drives outputs only when G is asserted. |
| PRESTO II programming algorithm | Guarantees cell margin without overprogramming - each 100 µs pulse is verified in margin mode, eliminating need for iterative rewrites. |
| Electronic Signature (20h/44h) | Allows fully automated device recognition in programming equipment via A9 voltage pulse and A0 toggling - prevents algorithm mismatches. |
| ECOPACK® RoHS compliance | Lead-free PDIP40 package meets JEDEC JESD97 second-level interconnect marking requirements - suitable for environmentally regulated industrial deployments. |
| UV-erasable architecture (FDIP40W variant) | Though M27C4002-80C6 is OTP-only PDIP, the core die supports UV erasure in windowed packages - enabling reuse in development and prototyping workflows. |
Applications
| Industrial PLC Firmware Storage | Legacy Automotive ECU Boot ROM |
|---|---|
|
Use Scenario: Storing fixed boot code and safety-critical calibration tables in programmable logic controllers deployed in factory automation environments with 15+ year service life expectations. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space; provides deterministic 45 ns read latency during power-on initialization sequences. Use Value: UV-erasable variants allow field firmware updates via quartz lamp; OTP PDIP40 version ensures tamper-resistant production deployment with no accidental reprogramming risk. |
Use Scenario: Holding engine control unit startup routines and sensor lookup tables in pre-OBD-II automotive systems where EEPROM endurance was insufficient and flash reliability unproven. IC Role / Device Role / Timing Role: Asynchronous instruction ROM interfaced directly to 8051 or 68HC11 derivatives; operates across –40°C to +85°C without timing derating. Use Value: 100 µA standby current extends battery backup runtime during vehicle ignition-off periods; dual-control lines prevent bus contention in multi-ROM diagnostic subsystems. |
| Medical Device Diagnostic Firmware | Avionics Test Equipment Memory |
|
Use Scenario: Storing FDA-cleared diagnostic algorithms and hardware self-test vectors in Class II medical analyzers requiring long-term data integrity and audit-trail traceability. IC Role / Device Role / Timing Role: Read-only configuration store accessed during power-up self-test; immune to radiation-induced bit flips common in SRAM-based alternatives. Use Value: ECOPACK® lead-free packaging satisfies IEC 60601-1 environmental compliance; 15-year data retention spec ensures firmware validity across device lifecycle without refresh cycles. |
Use Scenario: Providing golden reference patterns and test vector tables in ground-based avionics BIT (Built-In Test) equipment used for flight-critical system validation. IC Role / Device Role / Timing Role: Static pattern ROM accessed by FPGA-based controller; 45 ns access time synchronizes with 20 MHz test clock domain without pipeline stalls. Use Value: PRESTO II programming guarantees margin against parameter drift over temperature - critical for test repeatability across –20°C to +70°C operational range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM-based firmware storage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C400-80DC | 4 Mbit (256K×16), 80 ns access, 5 V operation, PDIP40 - lacks PRESTO II algorithm and electronic signature; uses standard 12 V programming. | Lower performance ceiling; suitable only for sub-12.5 MHz bus systems; no automated programmer ID capability. | Select when cost sensitivity outweighs speed and programming automation needs; verify compatibility with existing PROM programmers. |
| AT27C4096-80PU | 4 Mbit (512K×8), 80 ns, 5 V, PDIP40 - 8-bit organization requires bus-width adaptation; supports both UV and OTP variants; Atmel-specific signature codes. | Requires external byte-enable logic for 16-bit CPUs; different pinout (Q0–Q7 only); incompatible with M27C4002 address mapping. | Choose only if migrating from 8-bit architectures or leveraging Atmel's extended UV endurance (10k erase cycles vs. ST's 1k). |
Compared with AM27C400-80DC and AT27C4096-80PU, the M27C4002-80C6 delivers faster 45 ns access, integrated electronic signature for foolproof programming, and PRESTO II margin verification - making it optimal for high-reliability 16-bit embedded boot memory where timing determinism and field-programmability assurance are mandatory.
Availability
M27C4002-80C6 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy automotive ECU boot ROM, and medical device diagnostic firmware requiring stable component supply across extended product lifecycles.
Supply support for M27C4002-80C6 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 microcontrollers, power management, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The M27C4002 belongs to ST's legacy EPROM product line, designed specifically for high-reliability, long-lifecycle embedded systems requiring field-erasable or one-time-programmable firmware storage with deterministic timing and robust environmental tolerance.
FAQ
Is M27C4002-80C6 UV-erasable?
No. The -80C6 suffix indicates the PDIP40 plastic package without a quartz window, making it one-time programmable (OTP) only. UV erasure requires the FDIP40W ceramic frit-seal package with transparent lid. This distinction is explicitly defined in ST's ordering information table (Table 17) and confirmed in the Summary Description section.
What is the correct VCC voltage during programming?
VCC must be 6.25 V ± 0.25 V during programming and verify operations, per Table 8 and Section 2.5. This is distinct from the 5 V ±10% used in read mode. Applying 5 V during programming risks incomplete cell programming or premature wear; the voltage must be sequenced after VPP stabilization and removed before VPP deactivation.
Can M27C4002-80C6 be used in a 3.3 V system?
No. The device requires 5 V ±10% for read operations and 6.25 V for programming; its input thresholds (VIH = 2 V, VIL = 0.8 V) and output drive levels (VOH = 2.4 V, VOL = 0.4 V) are TTL-compatible only. Direct interface with 3.3 V logic necessitates level-shifting circuitry and violates absolute maximum ratings for VIO.
How is the Electronic Signature read?
Apply 11.5–12.5 V to A9 while holding VCC = VPP = 5 V, E = VIL, G = VIL, and all other address lines at VIL. Toggle A0 between VIL and VIH: Q7–Q0 outputs byte 0 (manufacturer code 20h) when A0 = VIL, then byte 1 (device code 44h) when A0 = VIH - as specified in Table 3 and Section 2.9.
M27C4002-80C6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 44-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:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 80 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
M27C4002-80C6 FAQ
1.How can I place an order for M27C4002-80C6 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C4002-80C6 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 M27C4002-80C6 reliable?
The price and inventory of M27C4002-80C6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C4002-80C6 is usually 5 days.
3.What payment methods are accepted for M27C4002-80C6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C4002-80C6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C4002-80C6?
M27C4002-80C6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C4002-80C6 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 M27C4002-80C6?
For technical support, including M27C4002-80C6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C4002-80C6 requirements.
6.How does Aetrix verify that M27C4002-80C6 is sourced from the original manufacturer or authorized distributors?
All M27C4002-80C6 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 M27C4002-80C6 meets industry standards.
7.What is the process for return or replacement of M27C4002-80C6?
All M27C4002-80C6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C4002-80C6, 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 M27C4002-80C6 part is unused and in its original packaging.
Return procedure for M27C4002-80C6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C4002-80C6 Tags
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