My Inquiry
My Account
STMicroelectronics M27C512-70C6
- Part No.:
- M27C512-70C6
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C512-70C6.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,791
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M27C512-70C6 from STMicroelectronics is a 512 Kbit (64K × 8) OTP EPROM in PLCC32 package, featuring 70 ns access time, 5 V ±10% read supply, 30 mA active current, and 100 µA standby current. It supports two-line output control (E and GVPP), electronic signature (20h/3Dh), and PRESTO IIB programming with ~6 s typical write time - used in legacy industrial controllers and firmware storage where one-time programmability and UV-erasable alternatives are not required.
For engineers reviewing the M27C512-70C6 datasheet, M27C512-70C6 pinout, M27C512-70C6 application, or M27C512-70C6 equivalent, key selection criteria include verified 70 ns AC timing under TTL-level control, PLCC32 thermal and mechanical compatibility, OTP reliability for fixed boot code, and GVPP-based programming voltage sequencing at 12.75 V ±0.25 V.
Technical Context
The M27C512-70C6 operates in Read, Standby, Programming, Program Inhibit, and Electronic Signature modes. Its dual-control architecture uses E (Chip Enable) for device selection and GVPP (Output Enable / Program Supply) to gate outputs or enable programming - enabling low-power array partitioning and conflict-free bus sharing.
Programming requires VCC = 6.25 V ±0.25 V and VPP = 12.75 V ±0.25 V applied simultaneously; data is latched on Q0–Q7 during E-low pulses. Margin Mode verification ensures cell programming margin without overprogramming, and electronic signature identification (A9 = 12 V, A0 toggled) returns manufacturer code 20h and device code 3Dh.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8) - provides 65,536 addressable bytes for firmware or configuration storage. |
| Access Time (tAVQV) | 70 ns - guarantees data valid within 70 ns after address and E stabilize, meeting legacy microcontroller bus timing. |
| Read Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails without external regulation. |
| Active Current | 30 mA - defines worst-case power draw during sustained read cycles in embedded systems. |
| Standby Current | 100 µA - enables low-quiescent operation when deselected via E high, critical for power-sensitive designs. |
| Programming Voltage | 12.75 V ±0.25 V on GVPP - requires dedicated programming supply rail; not derived from VCC. |
| Programming Time | ~6 s typical with PRESTO IIB - reduces production programming cycle vs. legacy algorithms. |
Pinout & Package
PLCC32 (Plastic Leaded Chip Carrier, 32-pin, J-lead) package with 11.43 mm × 13.97 mm body, 1.27 mm lead pitch, and moisture sensitivity level (MSL) 3 per JEDEC J-STD-020. RoHS-compliant ECOPACK® variant with lead-free terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus inputs accepting TTL/CMOS levels; fully decoded to select one of 65,536 bytes. |
| Q0–Q7 | Data Outputs | 8-bit bidirectional data bus - outputs valid during read; accepts programming data during write mode. |
| E | Chip Enable | Active-low primary device select; places device in standby (Hi-Z outputs) when high. |
| GVPP | Output Enable / Program Supply | Active-low output gate in read mode; supplies 12.75 V programming voltage during write mode. |
| VCC | Supply Voltage | +5 V read supply; must be applied simultaneously with or before VPP and removed after VPP. |
| VSS | Ground | Reference return for all signals and power domains; requires local 0.1 µF ceramic decoupling. |
| A9 (Electronic Signature) | Manufacturer ID Trigger | Receives 12 V input to activate Electronic Signature mode; outputs manufacturer code (20h) and device code (3Dh). |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + GVPP) | Enables zero-bus-contention memory arrays by independently managing device selection and output gating. |
| PRESTO IIB programming algorithm | Reduces full-array programming to ~6 s with built-in margin verification, eliminating overprogram risk. |
| Electronic Signature (20h/3Dh) | Allows automated programmer identification and algorithm matching without manual part selection. |
| ECOPACK® compliance | Lead-free PLCC32 packaging meets RoHS and JEDEC JESD97 second-level interconnect labeling requirements. |
| Low standby current (100 µA) | Supports battery-backed or energy-constrained systems where memory remains powered but inactive. |
Applications
| Industrial PLC Firmware Storage | Legacy Medical Device Boot ROM |
|---|---|
|
Use Scenario: Storing immutable boot loader and safety-critical initialization code in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile program memory mapped to CPU address space; accessed during power-on reset with strict 70 ns tAVQV timing. Use Value: OTP architecture prevents accidental reprogramming in field-deployed units; PLCC32 withstands industrial vibration and thermal cycling. |
Use Scenario: Holding certified diagnostic firmware in Class II medical instruments requiring long-term data retention without battery backup. IC Role / Device Role / Timing Role: Fixed-function ROM providing deterministic startup sequence; read under 5 V TTL-compatible bus timing. Use Value: 100 µA standby current extends shelf life of sealed devices; ECOPACK® compliance satisfies IEC 60601-1 environmental requirements. |
| Avionics Configuration Memory | Test Equipment Calibration Data |
|
Use Scenario: Storing aircraft subsystem configuration tables (e.g., sensor scaling, fault thresholds) in DO-254-certified hardware. IC Role / Device Role / Timing Role: Read-only memory accessed via discrete address decoding; timing validated per MIL-STD-883 method 3015. Use Value: 70 ns access time ensures deterministic response in real-time avionics buses; OTP eliminates erase-cycle wear-out concerns. |
Use Scenario: Embedding factory-calibrated coefficients and linearity corrections in benchtop oscilloscopes and signal generators. IC Role / Device Role / Timing Role: Static configuration store accessed once per power cycle; programmed pre-shipment using ST-approved programmers. Use Value: Electronic signature (20h/3Dh) enables automated calibration data verification during final test; PLCC32 facilitates socketed replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C512-70DC | 70 ns access, 5 V read, but uses PDIP28 package and requires 12.5 V programming voltage (±0.5 V tolerance vs. M27C512's ±0.25 V). | PDIP28 footprint incompatible with PLCC32 PCB layout; higher programming voltage tolerance relaxes supply design but reduces margin. | Select only if existing board uses through-hole sockets and 12.5 V programming infrastructure is already deployed. |
| AT27C512R-70PU | 70 ns access, 5 V read, PLCC32 package, but supports 12 V ±0.5 V programming and lacks Electronic Signature mode. | No auto-identification capability; requires manual algorithm selection in programming tools; same pinout but different A9 behavior. | Choose when Electronic Signature is unnecessary and sourcing flexibility across Atmel/ST ecosystems is prioritized over guaranteed margin verification. |
Compared with AM27C512-70DC and AT27C512R-70PU, the M27C512-70C6 offers tighter VPP tolerance (±0.25 V), integrated Electronic Signature for tool automation, and ST-specific PRESTO IIB margin verification - making it optimal for high-reliability, production-programmed firmware storage where traceability and programming consistency are critical.
Availability
M27C512-70C6 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy medical device boot ROM, avionics configuration memory, and test equipment calibration data requiring stable component supply across extended product lifecycles.
Supply support for M27C512-70C6 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 M27C512 belongs to ST's legacy EPROM product line, engineered specifically for cost-sensitive, high-reliability firmware storage in systems where flash endurance or reprogrammability is unnecessary and UV-erasable alternatives introduce handling complexity.
FAQ
Is M27C512-70C6 UV-erasable?
No. The M27C512-70C6 is an OTP (One-Time Programmable) variant housed in a PLCC32 plastic package without a quartz window. Only FDIP28W versions support UV erasure; this part is permanently programmed after initial write and cannot be erased or reprogrammed.
What is the role of GVPP beyond programming?
In read mode, GVPP functions as Output Enable (active-low), controlling data bus drive - identical to standard OE pins. During programming, it becomes the 12.75 V supply input. This dual function eliminates need for separate OE and VPP pins, simplifying PCB routing while maintaining timing integrity.
Can M27C512-70C6 operate at 3.3 V?
No. The device requires 5 V ±10% (4.5–5.5 V) for read operations and 6.25 V ±0.25 V for programming. It does not support 3.3 V logic levels or supply; interfacing with 3.3 V systems requires level-shifting on address, data, and control lines.
How is Electronic Signature verified in production?
Production programmers apply 12 V to A9 while holding all other addresses low, then toggle A0 to read Q7–Q0. First read yields 20h (STMicroelectronics), second yields 3Dh (M27C512). This confirms correct device insertion and avoids algorithm mismatches before programming begins.
M27C512-70C6 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:
- 70 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)
M27C512-70C6 FAQ
1.How can I place an order for M27C512-70C6 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C512-70C6 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 M27C512-70C6 reliable?
The price and inventory of M27C512-70C6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C512-70C6 is usually 5 days.
3.What payment methods are accepted for M27C512-70C6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C512-70C6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C512-70C6?
M27C512-70C6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C512-70C6 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 M27C512-70C6?
For technical support, including M27C512-70C6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C512-70C6 requirements.
6.How does Aetrix verify that M27C512-70C6 is sourced from the original manufacturer or authorized distributors?
All M27C512-70C6 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 M27C512-70C6 meets industry standards.
7.What is the process for return or replacement of M27C512-70C6?
All M27C512-70C6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C512-70C6, 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 M27C512-70C6 part is unused and in its original packaging.
Return procedure for M27C512-70C6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C512-70C6 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
