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

STMicroelectronics M27C512-10C6

Name: M27C512-10C6
Brand: STMicroelectronics
SKU: M27C512-10C6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27C512-10C6

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 32-LCC (J-Lead)

Datasheet:: M27C512-10C6.pdf

Description:: IC EPROM 512KBIT PARALLEL 32PLCC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

M27C512-10C6 from STMicroelectronics is a 512 Kbit (64K × 8) OTP EPROM in PLCC32 package, operating at 5V ±10%, with 100 ns access time, 30 mA active current, and 100 µA standby current. It supports TTL-level addressing and data I/O, uses 12.75 V programming voltage, and features electronic signature (20h/3Dh) for automated programmer recognition - deployed in legacy industrial controllers and boot ROMs where one-time programmability and UV-erasable alternatives are not required.

For engineers reviewing the M27C512-10C6 datasheet, M27C512-10C6 pinout, M27C512-10C6 application, or M27C512-10C6 equivalent, this page delivers verified timing specs, PLCC32 terminal mapping, two-line output control behavior, PRESTO IIB programming compatibility, and real-world use constraints including margin mode verification and A9 high-voltage electronic signature activation.

Technical Context

The M27C512-10C6 operates in three primary modes: Read (E = VIL, GVPP = VIL), Standby (E = VIH), and Programming (E pulsed low with GVPP = 12.75 V). Its two-line output control decouples chip enable (E) for power gating and output enable (GVPP/G) for bus contention avoidance - enabling low-power memory arrays without external bus buffers.

Programming relies on the PRESTO IIB algorithm with 100 µs pulses per byte, internal margin mode verification at reduced VCC (4.2 V and 6 V), and A9-driven electronic signature (11.5–12.5 V) for automatic device identification. It does not support erasure - as an OTP variant, it lacks UV window and is sealed in lead-free ECOPACK® PLCC32.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	512 Kbit (64K × 8), fixed parallel organization - no address multiplexing; requires 16-bit address bus and 8-bit data bus.
Access Time	100 ns (tAVQV, tELQV) under High Speed AC conditions - defines minimum clock-to-data delay in 5 MHz read cycles.
Supply Voltage	5 V ±10% for read; 6.25 V ±0.25 V for programming - mandates separate VCC regulation during program cycle.
Programming Voltage	12.75 V ±0.25 V applied to GVPP pin - must be stable before E pulse; overshoot beyond 14 V risks permanent damage.
Standby Current	100 µA (CMOS E > VCC – 0.2 V) - enables low-quiescent power retention in battery-backed systems.
Electronic Signature	Manufacturer code 20h, device code 3Dh read via A9=12 V and A0 toggling - used by programmers to auto-select PRESTO IIB algorithm.
Output Drive	TTL-compatible: VOH = 3.6 V (IOH = –1 mA), VOL = 0.4 V (IOL = 2.1 mA) - directly interfaces with 74LS/ALS logic families.

Pinout & Package

PLCC32 (plastic leaded chip carrier, 32-pin, J-lead, 11.43 mm × 13.97 mm body) with ECOPACK® lead-free finish. Pin 1 marked by corner notch; pin 17 is VCC, pin 32 is VSS, pin 16 is GVPP, pin 1 is A0, pin 31 is Q7.

Pin/Terminal	Circuit Role	Design Meaning
A0–A15	Address Inputs	16-bit unidirectional address bus; A9 carries 12 V for electronic signature - requires HV-tolerant driver in programming hardware.
Q0–Q7	Data Outputs	8-bit bidirectional data bus in programming mode (data-in); outputs float to Hi-Z when E = VIH or GVPP = VIH.
E	Chip Enable	Active-low primary selection signal - controls ICC draw (30 mA → 100 µA) and enables programming pulse response.
GVPP	Output Enable / Program Supply	Dual-function pin: acts as G (output enable) during read; becomes VPP input (12.75 V) during programming - requires HV isolation switch.
VCC	Power Supply	+5 V for read; +6.25 V during programming - must ramp synchronously with VPP to avoid latch-up per datasheet Section 4.
VSS	Ground	Reference for all I/O and supply pins; requires dedicated low-inductance 0.1 µF ceramic decoupling adjacent to pin 32.

Key Features

Feature	Design Value
Two-line output control	Independent E (power gating) and GVPP (bus drive) enables zero-bus-contention memory expansion without external transceivers.
PRESTO IIB programming	Guarantees full array programming in ≤6.5 s with margin-mode verify at 4.2 V/6 V - eliminates overprogramming and improves cell endurance.
Electronic signature	Hardware-level device ID (20h/3Dh) readable via A9 high-voltage toggle - ensures correct algorithm selection in multi-device programmers.
ECOPACK® compliance	Lead-free PLCC32 package meeting JEDEC JESD97 second-level interconnect marking - suitable for RoHS-compliant industrial assembly.
Low standby power	100 µA CMOS standby current allows integration into always-on monitoring circuits without battery drain penalties.

Applications

Industrial PLC Boot ROM

Legacy Medical Device Firmware

Use Scenario: Stores fixed startup firmware for programmable logic controllers operating in factory-floor environments with wide temperature swings (–40°C to 85°C).

IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to CPU reset vector; provides deterministic 100 ns instruction fetch latency during cold start.

Use Value: OTP architecture prevents accidental reprogramming in field-deployed units; PLCC32's thermal mass stabilizes timing across ambient shifts.

Use Scenario: Holds calibration constants and safety-critical initialization routines in Class II medical analyzers certified to IEC 60601-1.

IC Role / Device Role / Timing Role: Read-only configuration store accessed during power-on self-test (POST); timing-critical due to watchdog timeout constraints.

Use Value: 100 µA standby current extends backup battery life; electronic signature ensures firmware loader validates device identity before execution.

Avionics Maintenance Interface

Test Equipment Pattern Memory

Use Scenario: Stores diagnostic microcode in portable avionics test sets used for Line Replaceable Unit (LRU) validation on aircraft ground support equipment.

IC Role / Device Role / Timing Role: Static memory holding bit-pattern generators and protocol decoders; accessed via 8-bit ISA-style bus at ≤5 MHz.

Use Value: PLCC32's gull-wing leads withstand vibration-induced solder fatigue; 5 V tolerance matches legacy ARINC-429 interface logic levels.

Use Scenario: Holds stimulus vectors for automated PCB functional testers performing boundary-scan and analog stimulus sequencing.

IC Role / Device Role / Timing Role: High-reliability pattern source synchronized to tester clock; requires guaranteed 100 ns setup/hold timing under varying load.

Use Value: PRESTO IIB programming ensures bit-perfect pattern replication across production batches; 30 mA active current supports concurrent multi-channel drive.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AM27C512-10DC	Same 64K×8 OTP EPROM, 100 ns access, but in PDIP28 package and rated for commercial temp (0°C to 70°C).	Lacks ECOPACK® lead-free compliance and PLCC32 mechanical robustness - unsuitable for industrial vibration or extended temp operation.	Select only for cost-sensitive lab prototypes where PLCC rework is impractical and RoHS is not mandated.
AT27C512R-10PU	512 Kbit OTP EPROM with 100 ns access, but uses 5 V-only VPP (no 12.75 V requirement) and supports standard 5 V programming.	Eliminates need for HV generation circuitry; however, lacks electronic signature and PRESTO IIB - reduces programmer compatibility.	Prefer when simplifying power design outweighs loss of automated device ID and faster programming margin.

Compared with AM27C512-10DC, M27C512-10C6 offers wider temperature range and RoHS compliance; compared with AT27C512R-10PU, it retains electronic signature and PRESTO IIB for legacy toolchain support - critical for maintenance of installed base systems.

Availability

M27C512-10C6 is available at Aetrix Electronics and suitable for industrial PLC boot ROMs, legacy medical device firmware storage, avionics maintenance interfaces, and test equipment pattern memory requiring stable component supply across extended product lifecycles.

Supply support for M27C512-10C6 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 M27C512 belongs to ST's legacy EPROM product line, engineered for reliability-critical embedded systems where firmware immutability, long-term data retention (>10 years), and compatibility with aging programming infrastructure are mandatory.

FAQ

Is M27C512-10C6 UV-erasable?

No. The -10C6 suffix denotes the PLCC32 OTP (one-time programmable) version. It lacks the quartz window and UV-erasable silicon structure found in FDIP28W variants like M27C512-10F1. Once programmed, its contents are permanently fixed - no ultraviolet light exposure or electrical erase method can restore the '1' state.

What is the role of GVPP during read operation?

During read, GVPP functions as the output enable (G) signal - identical to standard OE pin behavior. When GVPP = VIL, outputs Q0–Q7 drive valid data; when GVPP = VIH, outputs enter high-impedance state regardless of E level. This dual-role pin eliminates need for separate OE and VPP pins, reducing package count but requiring careful HV switching in programming fixtures.

Can M27C512-10C6 be used in place of UV EPROM versions?

Only in systems where firmware never requires field updates. Electrically, pinout and timing match UV variants (e.g., M27C512-10F1), but OTP devices cannot be erased - making them unsuitable for development, prototyping, or applications needing post-deployment firmware patches. Verify system architecture assumes immutable code before substitution.

Why does A9 require 12 V for electronic signature?

A9 is repurposed as a high-voltage control line (11.5–12.5 V) to activate the electronic signature mode - a hardware-level ID mechanism that avoids software overhead. This voltage triggers internal decoding to output manufacturer (20h) and device (3Dh) codes on Q7–Q0. Standard TTL drivers cannot generate this level; dedicated HV circuitry or programmer-controlled A9 pull-up is mandatory.

M27C512-10C6 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:: 512Kbit

Memory Organization:: 64K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: -

Access Time:: 100 ns

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-PLCC (11.43x13.97)

M27C512-10C6 FAQ

1.How can I place an order for M27C512-10C6 through Aetrix?

Please submit a Request for Quotation (RFQ) for M27C512-10C6 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 M27C512-10C6 reliable?

The price and inventory of M27C512-10C6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C512-10C6 is usually 5 days.

3.What payment methods are accepted for M27C512-10C6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C512-10C6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27C512-10C6?

M27C512-10C6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27C512-10C6 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 M27C512-10C6?

For technical support, including M27C512-10C6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C512-10C6 requirements.

6.How does Aetrix verify that M27C512-10C6 is sourced from the original manufacturer or authorized distributors?

All M27C512-10C6 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 M27C512-10C6 meets industry standards.

7.What is the process for return or replacement of M27C512-10C6?

All M27C512-10C6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C512-10C6, 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 M27C512-10C6 part is unused and in its original packaging.

Return procedure for M27C512-10C6:

1.Submit a request within 90 days.

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

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