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Home > Products > Integrated Circuits (ICs) > Memory > Memory

STMicroelectronics M27W101-80K6TR

Name: M27W101-80K6TR
Brand: STMicroelectronics
SKU: M27W101-80K6TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27W101-80K6TR

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 32-LCC (J-Lead)

Datasheet:: M27W101-80K6TR.pdf

Description:: IC EPROM 1MBIT PARALLEL 32PLCC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

M27W101-80K6TR from STMicroelectronics is a 1 Mbit (128K × 8) low-voltage UV-erasable and OTP EPROM in PLCC32 package, operating from 2.7V to 3.6V with 80 ns access time at V_CC = 2.7V–3.6V, supporting microprocessor program storage in industrial control and legacy embedded systems requiring nonvolatile, field-erasable code retention.

For engineers reviewing the M27W101-80K6TR datasheet, M27W101-80K6TR pinout, M27W101-80K6TR application, or M27W101-80K6TR equivalent, this page delivers verified read timing, programming voltage requirements, electronic signature codes, standby current behavior, and PLCC32 mechanical compatibility-critical for legacy system maintenance, EPROM socket replacement, and UV-erase cycle validation.

Technical Context

The M27W101-80K6TR implements dual-line output control via Chip Enable (E) and Output Enable (G), enabling low-power array partitioning: E selects device power state (active/standby), while G gates output drivers independently. This architecture ensures bus contention avoidance and supports TTL-level address/data inputs with CMOS-compatible logic thresholds.

It supports two distinct operational modes: Read mode (V_CC = 2.7–3.6V, I_CC = 15 mA active / 15 µA standby) and Programming mode (V_CC = 6.25V ± 0.25V, V_PP = 12.75V ± 0.25V, 100 µs/byte pulse width). Electronic Signature mode uses 12V on A9 to return manufacturer code 20h and device code 05h on Q7–Q0.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (131,072 × 8 bits), directly replaceable for M27C1001 in 8-bit data bus systems.
Read Access Time	80 ns at V_CC = 2.7–3.6V, defining maximum sustained CPU clock rate for zero-wait-state operation.
Supply Voltage (Read)	2.7V–3.6V, enabling direct interface with 3.3V logic without level shifters.
Standby Current	15 µA at V_CC ≤ 3.6V with E = VIH, critical for battery-backed memory retention.
Programming Voltage	V_PP = 12.75V ± 0.25V, V_CC = 6.25V ± 0.25V - requires dedicated EPROM programmer with dual-rail supply.
Electronic Signature	Manufacturer Code = 20h, Device Code = 05h, used by programmers to auto-select Presto II algorithm.
Operating Temperature	–40°C to +85°C, qualified for industrial-grade embedded controller environments.

Pinout & Package

PLCC32 (32-lead Rectangular Plastic Leaded Chip Carrier, K suffix), 11.43 mm × 13.97 mm body, J-lead profile, lead-free ECOPACK® compliant.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus (0–131,071); A9 carries 12V for Electronic Signature mode.
Q0–Q7	Data Outputs	Bi-directional 8-bit data bus; outputs valid only when E = VIL and G = VIL.
E	Chip Enable	Primary device select; VIH places device in 15 µA standby, isolating outputs.
G	Output Enable	Secondary output gate; controls Q0–Q7 drive independent of E state.
P	Program Control	Active-low pulse input; initiates byte programming when E = VIL and V_PP = 12.75V.
V_PP	Programming Supply	12.75V input required during programming/verify; must be applied simultaneously with or after V_CC.
V_CC	Supply Voltage	2.7–3.6V for read/standby; 6.25V ± 0.25V for programming - not interchangeable across modes.
V_SS	Ground	Reference for all signals; requires local 0.1 µF ceramic decoupling per device.

Key Features

Feature	Design Value
Low-Voltage Read Operation	2.7V minimum V_CC enables direct integration into 3.3V systems without regulators or level translators.
Two-Line Output Control (E + G)	Enables hierarchical memory banking: E powers down entire device (15 µA), G disables outputs only (Hi-Z), preventing bus conflicts.
Presto II Programming Algorithm	Guarantees full-array programming in ~13 seconds with margin verify at elevated V_CC, eliminating over-program risk.
Electronic Signature Support	Standardized 20h/05h ID codes allow automatic algorithm selection in universal EPROM programmers.
UV Erase Capability (FDIP variant)	FDIP32W package includes quartz window for 15–20 min UV exposure (2537 Å, ≥15 W·sec/cm²) to reset all bits to '1'.

Applications

Industrial PLC Firmware Storage

Legacy Medical Device Boot ROM

Use Scenario: Storing fixed firmware for programmable logic controllers deployed in factory automation cabinets with ambient temperatures up to 85°C.

IC Role / Device Role / Timing Role: Nonvolatile boot ROM providing instruction fetch to 8-bit microcontroller on power-up; accessed via synchronous 80 ns read cycle.

Use Value: 15 µA standby current extends backup battery life beyond 10 years; PLCC32 package allows socketed field replacement without PCB rework.

Use Scenario: Holding diagnostic calibration tables and safety-critical startup routines in Class II medical instruments certified to IEC 60601-1.

IC Role / Device Role / Timing Role: Read-only memory mapped at CPU address 0x0000–0x1FFFF; accessed under strict timing constraints during cold start sequence.

Use Value: UV-erasable capability (in FDIP variant) permits regulatory-compliant firmware updates during service; ECOPACK® compliance meets RoHS/REACH requirements.

Avionics Maintenance Terminal BIOS

Test Equipment Pattern Memory

Use Scenario: Storing boot loader and configuration data in portable avionics ground support equipment operating across –40°C to +70°C environmental chambers.

IC Role / Device Role / Timing Role: EPROM-based BIOS executing self-test and hardware initialization before loading OS from flash; requires deterministic 80 ns read latency.

Use Value: Pin compatibility with M27C1001 enables drop-in replacement in aging designs; 2,000V ESD rating protects against handling damage in ESD-safe labs.

Use Scenario: Providing stimulus/response pattern storage for automated circuit board test systems requiring repeatable, unalterable vector sets.

IC Role / Device Role / Timing Role: Static memory holding 128KB of test vectors; accessed sequentially by pattern generator logic with precise t_ACC timing.

Use Value: OTP option (PDIP/PLCC/TSOP variants) guarantees immutable pattern integrity; 100 µs/byte programming enables fast one-time load during test fixture setup.

Equivalent & Alternatives

The following parts are listed as comparable options for similar EPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AM27C1001-12DC	5V-only operation (no 2.7–3.6V read mode); 120 ns access time; requires 21V V_PP for programming.	Not suitable for low-voltage systems; incompatible with 3.3V I/O domains without translation.	Select only if legacy 5V infrastructure and existing 21V programmer are in place.
M27C1001-10F1	Same pinout and electronic signature (20h/05h); 100 ns access at 5V; UV-erasable only in FDIP package.	Lacks low-voltage read capability; higher active current (30 mA) reduces battery life in portable units.	Use where UV erasure is mandatory and 5V supply is available; avoid in new 3.3V designs.

Compared with AM27C1001-12DC and M27C1001-10F1, the M27W101-80K6TR uniquely supports 2.7–3.6V operation with 80 ns timing and 15 µA standby, making it the only viable EPROM for upgrading legacy 5V systems to 3.3V while retaining UV/OTP flexibility and socket compatibility.

Availability

M27W101-80K6TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy medical device boot ROM, avionics maintenance terminal BIOS, and test equipment pattern memory requiring stable component supply across extended product lifecycles.

Supply support for M27W101-80K6TR 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 specializing in automotive, industrial, and power management ICs, with over 40 years of nonvolatile memory development expertise.

The M27W101 belongs to ST's legacy EPROM product line, designed specifically for long-lifecycle industrial and aerospace applications requiring field-erasable or one-time-programmable code storage with guaranteed 20+ year data retention.

FAQ

What programming voltage and algorithm does M27W101-80K6TR require?

The M27W101-80K6TR requires V_PP = 12.75V ± 0.25V and V_CC = 6.25V ± 0.25V during programming, using the Presto II algorithm with 100 µs pulses per byte and automatic margin verify at elevated V_CC. It shares identical electronic signature (20h/05h) and pinout with M27C1001, enabling use of compatible programmers.

Is M27W101-80K6TR UV-erasable?

No - the -80K6TR suffix indicates PLCC32 packaging with no quartz window; it is OTP-only. UV erasure is supported only in the FDIP32W (F) variant with ceramic frit-seal window. The PLCC version is permanently programmed after initial write and cannot be erased by UV light.

Can M27W101-80K6TR operate at 3.3V without timing degradation?

Yes - it is fully specified for 2.7V–3.6V read operation, with 80 ns access time guaranteed across that entire range at –40°C to +85°C. At 3.3V, typical access is 70 ns, meeting timing margins for 12 MHz Z80 or 8051 derivatives without wait states.

What decoupling is required for stable operation?

Each M27W101-80K6TR requires a 0.1 µF ceramic capacitor placed between V_CC and V_SS within 5 mm of the PLCC pins. For multi-device boards, add a 4.7 µF bulk electrolytic capacitor per eight devices near the main power entry point to suppress transient voltage drops caused by E-signal edge currents.

M27W101-80K6TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 32-LCC (J-Lead)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EPROM

Technology:: EPROM - OTP

Memory Size:: 1Mbit

Memory Organization:: 128K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: -

Access Time:: 80 ns

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-PLCC (11.35x13.89)

M27W101-80K6TR FAQ

1.How can I place an order for M27W101-80K6TR through Aetrix?

Please submit a Request for Quotation (RFQ) for M27W101-80K6TR 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 M27W101-80K6TR reliable?

The price and inventory of M27W101-80K6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27W101-80K6TR is usually 5 days.

3.What payment methods are accepted for M27W101-80K6TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27W101-80K6TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27W101-80K6TR?

M27W101-80K6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27W101-80K6TR 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 M27W101-80K6TR?

For technical support, including M27W101-80K6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27W101-80K6TR requirements.

6.How does Aetrix verify that M27W101-80K6TR is sourced from the original manufacturer or authorized distributors?

All M27W101-80K6TR 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 M27W101-80K6TR meets industry standards.

7.What is the process for return or replacement of M27W101-80K6TR?

All M27W101-80K6TR units undergo pre-shipment inspection (PSI). If there is an issue with M27W101-80K6TR, 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 M27W101-80K6TR part is unused and in its original packaging.

Return procedure for M27W101-80K6TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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