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STMicroelectronics M27W101-80K6

Name: M27W101-80K6
Brand: STMicroelectronics
SKU: M27W101-80K6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27W101-80K6

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 32-LCC (J-Lead)

Datasheet:: M27W101-80K6.pdf

Description:: IC EPROM 1MBIT PARALLEL 32PLCC

Quantity:: RFQ Add To RFQ list

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Inventory:2,824

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Product details

Overview

M27W101-80K6 from STMicroelectronics is a 1 Mbit (128K × 8) low-voltage UV-erasable 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 embedded systems requiring nonvolatile, field-erasable memory with TTL-compatible I/O and dual-line output control.

For engineers reviewing the M27W101-80K6 datasheet, M27W101-80K6 pinout, M27W101-80K6 application, or M27W101-80K6 equivalent, key selection criteria include verified UV-erase capability, 15 µA standby current, 100 µs/byte programming time, electronic signature (20h/05h), and compatibility with Presto II programming algorithm on standard M27C1001 programmers.

Technical Context

The M27W101-80K6 implements a two-line output control architecture using independent Chip Enable (E) and Output Enable (G) inputs to minimize bus contention and power dissipation in multi-device memory arrays; E controls device selection and power state (active/standby), while G gates outputs without affecting power mode.

It supports four distinct operational modes-Read, Standby, Program, and Electronic Signature-each defined by specific voltage and timing conditions on E, G, P, A9, and V_PP; programming requires V_PP = 12.75 V and V_CC = 6.25 V, while read operation uses single 2.7–3.6 V supply and delivers data on Q0–Q7 with t_ELQV ≤ 80 ns.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (131,072 × 8 bits), enabling full firmware image storage for 8-bit microcontrollers
Read Access Time	80 ns at V_CC = 2.7–3.6 V, ensuring compatibility with 12.5 MHz bus timing
Supply Voltage Range	2.7 V to 3.6 V, allowing direct interface with 3.3 V logic and battery-powered systems
Standby Current	15 µA at V_CC ≤ 3.6 V, reducing quiescent power in always-on embedded controllers
Programming Time	100 µs per byte, enabling fast field updates via standard EPROM programmers
Electronic Signature	Manufacturer Code 20h / Device Code 05h, enabling automatic algorithm selection in programming equipment
UV Erase Time	15–20 min at ≥15 W·s/cm² (2537 Å UV), verified for full bit-pattern restoration

Pinout & Package

PLCC32 (K) package: 32-lead rectangular plastic leaded chip carrier, 11.43 mm × 13.97 mm body, J-lead termination, surface-mount compatible, with exposed pad not electrically connected.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus accepting 0–131071; A9 used for Electronic Signature voltage injection (12 V)
Q0–Q7	Data Outputs	8-bit bidirectional data bus; outputs driven during Read/Verify, high-Z in Standby/Inhibit
E	Chip Enable	Primary device select; VIH places device in Standby (15 µA), VIL enables active operation
G	Output Enable	Secondary output gate; controls Q0–Q7 drive independently of E for bus arbitration
P	Program Control	Active-low pulse input initiating byte programming when E = VIL and V_PP = 12.75 V
V_PP	Program Supply	12.75 V ± 0.25 V required only during programming/verify; tied to V_CC in read mode
V_CC	Power Supply	2.7–3.6 V for read/standby; 6.25 V ± 0.25 V for programming/verify
V_SS	Ground	Reference for all I/O and internal logic; decoupling capacitor required (0.1 µF ceramic)

Key Features

Feature	Design Value
Two-line output control (E + G)	Enables zero-bus-contention memory expansion and independent power/output gating
Presto II programming algorithm	Guarantees full-array programming in ≤13 s with margin-mode verify at elevated V_CC
Electronic Signature (20h/05h)	Allows auto-recognition by programmers, eliminating manual device selection errors
ECOPACK® compliance	Lead-free PLCC32 package meeting JEDEC JESD97 second-level interconnect marking
200 mA latch-up immunity	Ensures robustness against transient overcurrent events in industrial power environments

Applications

Industrial PLC Firmware Storage

Medical Device Boot Code Retention

Use Scenario: Storing immutable boot firmware and configuration parameters in programmable logic controllers deployed in factory automation cabinets with ambient temperatures up to 85°C.

IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic 80 ns read access to instruction fetch bus during cold start and runtime reinitialization.

Use Value: UV-erasability allows field firmware updates without PCB rework; 15 µA standby current extends backup battery life in maintenance-free deployments.

Use Scenario: Holding certified diagnostic firmware and calibration tables in portable ultrasound units powered by rechargeable Li-ion batteries.

IC Role / Device Role / Timing Role: Low-voltage EPROM interfacing directly with 3.3 V microcontroller address/data buses, delivering code with guaranteed t_ACC ≤ 80 ns across battery discharge range (3.6 V → 2.7 V).

Use Value: Single-supply 2.7–3.6 V operation eliminates level-shifting circuitry; ECOPACK® packaging satisfies medical RoHS compliance requirements.

Avionics Data Logging Memory

Test Equipment Calibration Storage

Use Scenario: Recording flight-critical sensor calibration coefficients in airborne data acquisition modules subject to thermal cycling (−40°C to +85°C) and UV exposure risk.

IC Role / Device Role / Timing Role: UV-erasable nonvolatile memory retaining coefficients across aircraft maintenance cycles; windowed FDIP variant used for lab erasure, K-package for sealed deployment.

Use Value: Verified 15–20 min UV erase ensures reliable coefficient reset before each flight cycle; 2,000 V ESD protection prevents corruption during handling.

Use Scenario: Storing instrument-specific calibration constants and linearity correction tables in benchtop oscilloscopes and signal generators.

IC Role / Device Role / Timing Role: OTP-capable EPROM used as permanent calibration store; programmed once post-calibration, then locked via opaque label over UV window (if FDIP) or sealed package (PLCC/TSOP).

Use Value: Pin compatibility with M27C1001 allows reuse of existing calibration programming infrastructure; electronic signature prevents misprogramming during batch calibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
M27C1001-10F1	5 V-only operation (no 2.7–3.6 V support); 100 ns access at 5 V; identical pinout and electronic signature (20h/05h)	Requires 5 V system rail; unsuitable for battery-powered or mixed-voltage designs	Select when legacy 5 V infrastructure exists and UV erase is needed without low-voltage constraint
AT27C010-70PU	5 V operation; 70 ns access; 20 mA active current; same 128K × 8 organization and PLCC32 footprint	Lacks Presto II algorithm support; requires different programming voltage sequence (12.5 V V_PP, 5 V V_CC)	Choose for cost-sensitive industrial controllers where 5 V supply is available and programming equipment lacks Presto II capability

Compared with M27W101-80K6, M27C1001-10F1 trades low-voltage flexibility for broader 5 V ecosystem compatibility, while AT27C010-70PU offers faster access but requires revalidation of programming flow and lacks the 15 µA standby advantage critical for battery longevity.

Availability

M27W101-80K6 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and avionics data logging requiring stable component supply, long-lifecycle availability, and UV-erasable nonvolatile memory with verified 80 ns timing.

Supply support for M27W101-80K6 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M27W101 belongs to ST's legacy EPROM product line, engineered specifically for microprocessor-based systems needing field-erasable, pin-compatible replacements for 5 V EPROMs while enabling lower-power 3.3 V operation and enhanced reliability.

FAQ

What UV wavelength and exposure dose are required to fully erase M27W101-80K6?

The M27W101-80K6 requires short-wave ultraviolet light at 2537 Å wavelength with a minimum integrated dose of 15 W·s/cm². Using a 12,000 µW/cm² lamp, full erasure takes 15–20 minutes at 2.5 cm distance. Direct sunlight or room fluorescent lighting may cause partial erasure over weeks or years and must be blocked with opaque labels during storage.

Can M27W101-80K6 be programmed on standard M27C1001 programmers?

Yes-M27W101-80K6 is fully compatible with M27C1001 programming hardware and the Presto II algorithm. It uses identical electronic signature (20h/05h), pinout, and programming voltages: V_PP = 12.75 V and V_CC = 6.25 V. No adapter or firmware update is required for existing M27C1001 programmers.

Does the PLCC32 (K) package support UV erasure?

No-the PLCC32 (K) package is opaque and intended for one-time-programmable (OTP) use only. UV erasure is supported exclusively in the FDIP32W (F) ceramic package with transparent quartz window. The K-suffix denotes the PLCC32 variant; UV functionality is physically impossible in this封装.

What is the maximum recommended clock frequency for reliable read operation?

The M27W101-80K6 does not use a clock; it is an asynchronous memory. Its 80 ns access time corresponds to a maximum effective bus frequency of 12.5 MHz (1/80 ns). For reliable operation, system timing must satisfy t_ELQV ≤ 80 ns, t_GLQV ≤ 50 ns, and t_EHQZ/t_GHQZ ≤ 50 ns under worst-case V_CC = 2.7 V and T_A = 85°C conditions.

M27W101-80K6 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:: 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)

M27W101-80K6 FAQ

1.How can I place an order for M27W101-80K6 through Aetrix?

Please submit a Request for Quotation (RFQ) for M27W101-80K6 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 M27W101-80K6 reliable?

The price and inventory of M27W101-80K6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27W101-80K6 is usually 5 days.

3.What payment methods are accepted for M27W101-80K6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27W101-80K6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27W101-80K6?

M27W101-80K6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27W101-80K6 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 M27W101-80K6?

For technical support, including M27W101-80K6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27W101-80K6 requirements.

6.How does Aetrix verify that M27W101-80K6 is sourced from the original manufacturer or authorized distributors?

All M27W101-80K6 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 M27W101-80K6 meets industry standards.

7.What is the process for return or replacement of M27W101-80K6?

All M27W101-80K6 units undergo pre-shipment inspection (PSI). If there is an issue with M27W101-80K6, 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 M27W101-80K6 part is unused and in its original packaging.

Return procedure for M27W101-80K6:

1.Submit a request within 90 days.

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

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