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STMicroelectronics M27C2001-55C1
- Part No.:
- M27C2001-55C1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C2001-55C1.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,606
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Product details
Overview
M27C2001-55C1 from STMicroelectronics is a 2 Mbit (262,144 × 8) UV-erasable EPROM in PLCC32 package with 55 ns access time, 5V ±10% read supply, and 12.75V ±0.25V programming voltage-used for firmware storage in legacy microprocessor systems requiring nonvolatile, field-erasable program memory.
For engineers reviewing the M27C2001-55C1 datasheet, M27C2001-55C1 pinout, M27C2001-55C1 application, or M27C2001-55C1 equivalent, key selection criteria include UV erasability, two-line output control (E/G), TTL-compatible timing, standby current of 100 µA, and compatibility with PRESTO II programming algorithms.
Technical Context
The M27C2001-55C1 operates in five distinct modes-Read, Standby, Program, Verify, and Electronic Signature-each defined by specific logic levels on E (Chip Enable), G (Output Enable), P (Program), and VPP (12.75V). Its dual-control architecture isolates device selection (E) from output gating (G), enabling low-power memory arrays without bus contention.
It implements a high-margin PRESTO II programming algorithm with 100 µs/word pulses and automatic margin verify at reduced VCC (4.2V/6V), ensuring reliable cell threshold distribution. Erasure requires UV exposure (2537 Å, ≥15 W·s/cm²) through the ceramic window in FDIP variants-but the -55C1 suffix confirms PLCC32 OTP configuration, eliminating UV window and erasure capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Mbit (262,144 × 8 bits) - supports full 18-bit address space for 8-bit microprocessor data buses. |
| Access Time | 55 ns - guarantees sub-18 MHz system clock synchronization in read mode with tAVQV = tELQV. |
| Read Supply | 5V ±10% - compatible with standard TTL/CMOS logic rails without regulation overhead. |
| Standby Current | 100 µA - enables low-power hold states in battery-backed or intermittent-operation embedded controllers. |
| Programming Voltage | 12.75V ±0.25V - requires dedicated HV supply rail; not derived from VCC, preventing accidental programming. |
| Input Capacitance | 6 pF - minimizes loading on address/data buses, supporting >20 MHz address transition rates without signal integrity loss. |
| Output Drive | TTL-compatible VOH = 2.4V @ –400 µA, VOL = 0.4V @ 2.1 mA - ensures direct interfacing with 74LS/74ALS logic families. |
Pinout & Package
PLCC32 (Plastic Leaded Chip Carrier, 32-pin, J-lead, 11.43 mm × 13.97 mm body) with moisture-sensitive level 3 (MSL3) handling requirements. Lead-free ECOPACK® compliant per JEDEC JESD97.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit parallel address bus; fully decoded to select one of 262,144 bytes; TTL-level compatible. |
| Q0–Q7 | Data Outputs | 8-bit bidirectional data bus during programming/verify; outputs Hi-Z when E or G inactive. |
| E | Chip Enable | Primary device-select input; CMOS-high (VIH > VCC–0.2V) forces standby mode (100 µA ICC2). |
| G | Output Enable | Secondary output gate; active-low; allows shared G-bus across multiple EPROMs while keeping deselected devices in standby. |
| P | Program Control | Active-low pulse input; initiates programming only when E = VIL and VPP = 12.75V; no effect in read mode. |
| VPP | Programming Supply | Dedicated 12.75V ±0.25V input; isolated from VCC; presence required to enter programming/verify modes. |
| VCC | Supply Voltage | 5V ±10% for read; 6.25V ±0.25V for programming-requires separate regulation or switching during program cycles. |
| VSS | Ground | Signal reference for all I/O and power pins; requires local 0.1 µF ceramic decoupling per device. |
Key Features
| Feature | Design Value |
|---|---|
| Two-Line Output Control (E + G) | Enables hierarchical memory array management: E selects device, G gates output-eliminates bus contention and reduces total system standby current. |
| PRESTO II Programming Algorithm | Guarantees margin-safe programming via 100 µs pulses and dual-voltage verify (6V/4.2V), removing need for overprogramming and reducing write time variability. |
| Electronic Signature Mode | Manufacturer code 20h and device code 61h readable via A9 = 12V and A0 toggling-enables automated programmer identification and algorithm matching. |
| ECOPACK® Compliance | Lead-free PLCC32 package marked per JEDEC JESD97; supports RoHS-compliant assembly without reflow profile modification. |
| Low-Power Standby | 100 µA ICC2 at CMOS-high E input-reduces idle power in multi-chip memory subsystems by >99% vs. active mode (30 mA). |
Applications
| Industrial PLC Firmware Storage | Legacy Automotive ECU Boot ROM |
|---|---|
|
Use Scenario: Storing fixed boot code and calibration tables in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to CPU address space; accessed during power-on reset and firmware update cycles using standard 8-bit data bus timing. Use Value: UV-erasable variant allows field firmware revision; OTP version (-55C1) provides cost-optimized, tamper-resistant storage for finalized production builds. |
Use Scenario: Holding engine control logic and sensor lookup tables in pre-OBD-II automotive ECUs where long-term data retention and radiation tolerance are critical. IC Role / Device Role / Timing Role: Read-only memory executing directly from address lines A0–A17; synchronized to 55 ns access window to meet 18 MHz CPU bus timing budgets. Use Value: 100 µA standby current extends battery backup life during vehicle ignition-off periods; ECOPACK® compliance meets Tier-1 supplier environmental mandates. |
| Medical Device Diagnostic Firmware | Avionics System Configuration Memory |
|
Use Scenario: Storing diagnostic self-test routines and regulatory-compliant safety firmware in Class II medical instruments requiring traceable, unalterable code storage. IC Role / Device Role / Timing Role: Static memory mapped at fixed base address; accessed via microcontroller's external bus interface with E/G-controlled output enable for deterministic timing. Use Value: PRESTO II programming ensures bit-level reliability across temperature extremes (–40°C to +85°C); electronic signature validates authenticity during manufacturing test. |
Use Scenario: Holding flight-critical configuration parameters and initialization vectors in airborne computing modules operating under DO-254 design assurance Level C. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization; decoupled from real-time processing via dedicated E/G control lines. Use Value: 6 pF input capacitance minimizes signal reflection on long PCB traces in ruggedized avionics backplanes; PLCC32 mechanical robustness resists vibration-induced solder fatigue. |
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 |
|---|---|---|---|
| AM27C2001-55DC | 55 ns access, same 2 Mbit organization, but AMD-branded with different electronic signature (Manuf. Code 01h, Device Code 61h) and slightly higher VPP tolerance (12.5–13.5V). | Requires revalidation of PRESTO II timing margins and signature-read firmware; identical PLCC32 footprint and pinout. | Select if existing AMD-programmer infrastructure is in place and cross-manufacturer qualification is approved. |
| AT27C2001-55JC | Atmel variant with identical speed grade and pinout, but uses 12.5V ±0.5V VPP and lacks ECOPACK® marking-RoHS status requires verification per batch. | Compatible with same socket and timing, but UV erasure characteristics differ (shorter 10–15 min lamp exposure); no JEDEC JESD97 second-level interconnect marking. | Prefer for cost-sensitive industrial designs where lead-free compliance is verified separately and UV erasure is retained. |
Compared with AM27C2001-55DC and AT27C2001-55JC, the M27C2001-55C1 offers guaranteed ECOPACK® compliance, tighter VPP regulation (±0.25V), and documented PRESTO II algorithm support-making it optimal for new designs requiring auditable environmental and programming reliability.
Availability
M27C2001-55C1 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 M27C2001-55C1 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 M27C2001 belongs to ST's legacy EPROM product line, designed specifically for high-reliability, field-programmable firmware storage in systems where EEPROM endurance or Flash write latency were unacceptable-prioritizing bit-level predictability and long-term data retention.
FAQ
Is M27C2001-55C1 UV-erasable or one-time programmable?
The -55C1 suffix denotes PLCC32 packaging and 55 ns speed grade, but does not indicate UV erasability. Per ST's ordering scheme and datasheet Section 1, PLCC32 variants are OTP (one-time programmable); only FDIP32W packages feature the quartz window for UV erasure. This part cannot be erased after programming.
What is the correct VCC voltage during programming?
VCC must be set to 6.25V ±0.25V during programming, not 5V. This is explicitly specified in Table 8 and Section 2.5. Using 5V will cause programming failure or marginal writes. A dedicated 6.25V regulator or adjustable supply is required-VCC and VPP must be applied simultaneously and removed in reverse order.
Can M27C2001-55C1 share the same data bus with other memory devices?
Yes-its two-line output control (E and G) enables safe bus sharing. Connect E to a unique chip-select decoder output and tie G to a common system READ line. When E is high, the device enters 100 µA standby mode and outputs go Hi-Z regardless of G state, preventing contention with other devices on the same bus.
Does M27C2001-55C1 support automatic programming algorithm detection?
Yes-via Electronic Signature mode. Applying 11.5–12.5V to A9 (with VCC = VPP = 5V) and toggling A0 reads Manufacturer Code 20h and Device Code 61h on Q7–Q0. This allows programmers to auto-detect STMicroelectronics' M27C2001 and load the correct PRESTO II algorithm without manual part selection.
M27C2001-55C1 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:
- 2Mbit
- Memory Organization:
- 256K 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 (13.96x11.46)
M27C2001-55C1 FAQ
1.How can I place an order for M27C2001-55C1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C2001-55C1 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 M27C2001-55C1 reliable?
The price and inventory of M27C2001-55C1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C2001-55C1 is usually 5 days.
3.What payment methods are accepted for M27C2001-55C1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C2001-55C1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C2001-55C1?
M27C2001-55C1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C2001-55C1 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 M27C2001-55C1?
For technical support, including M27C2001-55C1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C2001-55C1 requirements.
6.How does Aetrix verify that M27C2001-55C1 is sourced from the original manufacturer or authorized distributors?
All M27C2001-55C1 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 M27C2001-55C1 meets industry standards.
7.What is the process for return or replacement of M27C2001-55C1?
All M27C2001-55C1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C2001-55C1, 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 M27C2001-55C1 part is unused and in its original packaging.
Return procedure for M27C2001-55C1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C2001-55C1 Tags
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