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STMicroelectronics M27C512-70C6TR
- Part No.:
- M27C512-70C6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C512-70C6TR.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,449
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Product details
Overview
M27C512-70C6TR 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 CMOS standby current. It supports two-line output control (E and G), electronic signature (20h/3Dh), and PRESTO IIB programming with ~6 s typical programming time. Used in legacy industrial controllers and firmware storage where one-time programmability and UV-erasable alternatives are not required.
For engineers reviewing the M27C512-70C6TR datasheet, M27C512-70C6TR pinout, M27C512-70C6TR application, or M27C512-70C6TR equivalent, this page delivers verified technical context, real-world timing behavior, package-specific terminal mapping, functional alternatives, and supply-chain support for long-lifecycle embedded designs.
Technical Context
The M27C512-70C6TR 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) for output gating or programming voltage routing - enabling low-power array operation and bus contention avoidance.
Programming requires VCC = 6.25 V ± 0.25 V and VPP = 12.75 V ± 0.25 V applied simultaneously, with TTL-level address/data inputs and PRESTO IIB pulse sequencing (100 µs pulses per byte). Margin Mode verification ensures reliable cell programming without overprogramming, using A9 = 12 V for Electronic Signature identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8), fixed parallel organization supporting byte-wide data bus interfacing |
| Access Time | 70 ns max tAVQV - defines minimum clock-to-data delay in synchronous memory interfaces |
| Read Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails without regulation overhead |
| Active Current | 30 mA at 5 MHz - determines power budget for memory subsystems in legacy microcontroller systems |
| Standby Current | 100 µA (CMOS E high) - enables low-power hold states during processor sleep or idle cycles |
| Programming Voltage | VPP = 12.75 V ± 0.25 V - requires dedicated HV supply rail; not derived from VCC |
| Electronic Signature | Manufacturer code 20h, Device code 3Dh - enables automatic algorithm selection in universal programmers |
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-sensitive 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 interface; latched on E low transition during read or program |
| Q0–Q7 | Data Outputs | Bi-directional data bus pins used for both read output and program input (latched on E pulse) |
| E | Chip Enable | Primary device select; CMOS high places device in 100 µA standby; TTL low enables read/program |
| GVPP | Output Enable / Program Supply | Low = output enabled (read mode); high + VPP = programming mode activation |
| VCC | Supply Voltage | +5 V read supply; must be applied before/with VPP and removed after VPP to prevent latch-up |
| VSS | Ground | Reference return for all signals; decoupling capacitor (0.1 µF ceramic) required adjacent to pin |
| A9 | Address Input / Signature Control | Normal address bit; driven to 12 V for Electronic Signature mode to identify manufacturer/device |
| NC | No Connect | Pins 1, 32 (PLCC32) - internally unconnected; must remain floating or tied to VSS per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + GVPP) | Enables zero-bus-contention memory arrays by independently managing device selection and output enable |
| PRESTO IIB programming algorithm | Reduces full-array programming to ~6 seconds with margin-mode verify - eliminates need for iterative over-programming |
| Electronic Signature (20h/3Dh) | Allows auto-detection in universal programmers - prevents mismatched algorithms and programming failures |
| ECOPACK® RoHS compliance | Lead-free PLCC32 packaging meeting JEDEC JESD97 second-level interconnect marking 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 Automotive ECU Boot Code |
|---|---|
|
Use Scenario: Storing fixed boot firmware in programmable logic controllers deployed in factory automation environments with no field update requirement. IC Role / Device Role: Non-volatile program memory mapped to CPU address space; accessed via 8-bit data bus and 16-bit address bus. Use Value: OTP configuration eliminates risk of accidental reprogramming or UV erasure in industrial enclosures, ensuring firmware integrity over 15+ year deployments. |
Use Scenario: Holding calibration tables and startup routines in pre-OBD-II automotive engine control units where software revision is frozen at production. IC Role / Device Role: Read-only instruction and lookup table storage; interfaced directly to 8051-family microcontrollers with no external wait-state logic. Use Value: 70 ns access time meets timing budgets of 12 MHz MCUs without cycle stretching; PLCC32 allows socketed replacement during bench diagnostics. |
| Medical Device Configuration ROM | Avionics System Initialization Code |
|
Use Scenario: Storing immutable safety-critical configuration parameters in Class II medical analyzers certified under IEC 62304. IC Role / Device Role: Static configuration store read at power-on reset; isolated from write paths by hardware disable (E permanently asserted except during factory programming). Use Value: OTP guarantee prevents runtime corruption or unauthorized modification - satisfies traceability and audit requirements for regulatory submissions. |
Use Scenario: Holding aircraft initialization vectors and self-test sequences in legacy flight management computers operating under DO-254 Level A design assurance. IC Role / Device Role: High-reliability boot ROM accessed during cold start; PLCC32 package supports burn-in and post-solder X-ray inspection. Use Value: ECOPACK® lead-free construction complies with aerospace material restrictions while maintaining 125 °C operational rating for extended thermal cycling life. |
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 supply, but uses PDIP28 package and lacks ECOPACK® compliance | Requires through-hole PCB assembly; no surface-mount option for modern reflow lines | Select only if legacy board redesign is impractical and RoHS exemption applies |
| AT27C512R-70PU | 70 ns, 5 V, PDIP28, but supports 3 V–5.5 V VCC range and includes write-protect pin | Compatible with mixed-voltage systems; write-protect adds hardware-level programming lockout | Prefer when future board revisions require wider supply tolerance or enhanced programming security |
Compared with AM27C512-70DC, M27C512-70C6TR offers surface-mount compatibility and environmental compliance; versus AT27C512R-70PU, it trades voltage flexibility for guaranteed STMicroelectronics lifecycle support and tighter AC parameter consistency across temperature.
Availability
M27C512-70C6TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy automotive ECU boot code, and medical device configuration ROM requiring stable component supply across extended product lifecycles.
Supply support for M27C512-70C6TR 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, MCU, power, and memory products for industrial, automotive, and consumer markets.
The M27C512 belongs to ST's legacy EPROM product line, engineered specifically for cost-sensitive, long-lifecycle embedded systems where firmware immutability, UV-erasable alternatives are unnecessary, and PLCC packaging enables field serviceability.
FAQ
Is M27C512-70C6TR UV-erasable?
No. The -70C6TR suffix indicates PLCC32 packaging and OTP (One-Time Programmable) configuration. Only FDIP28W variants (e.g., M27C512-70XF1) feature a quartz window for UV erasure. This part is permanently programmed after initial write and cannot be erased or reprogrammed.
What is the role of GVPP during read vs. programming?
During read mode, GVPP functions as Output Enable (G): low enables Q0–Q7 outputs; high places them in high-impedance state. During programming, GVPP becomes the VPP supply input: held high at 12.75 V while E is pulsed low to initiate byte programming - the same pin serves dual roles controlled by voltage level and timing.
Can M27C512-70C6TR operate at 3.3 V?
No. The device requires 5 V ±10% (4.5–5.5 V) for read operation and 6.25 V ±0.25 V for programming. It does not support 3.3 V logic levels or supply rails. Interfacing with 3.3 V microcontrollers requires level-shifting on address/data/control lines or use of a 5 V tolerant interface buffer.
How is Electronic Signature verified in-system?
Electronic Signature is read by applying 12 V to A9 while holding all other address lines low, then toggling A0 between low and high. Q7–Q0 output 20h on A0 = low (manufacturer code) and 3Dh on A0 = high (device code). This occurs at 25 °C ±5 °C and requires precise 12 V A9 bias - not achievable with standard GPIO.
M27C512-70C6TR 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:
- 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)
M27C512-70C6TR FAQ
1.How can I place an order for M27C512-70C6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C512-70C6TR 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 M27C512-70C6TR reliable?
The price and inventory of M27C512-70C6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C512-70C6TR is usually 5 days.
3.What payment methods are accepted for M27C512-70C6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C512-70C6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C512-70C6TR?
M27C512-70C6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C512-70C6TR 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 M27C512-70C6TR?
For technical support, including M27C512-70C6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C512-70C6TR requirements.
6.How does Aetrix verify that M27C512-70C6TR is sourced from the original manufacturer or authorized distributors?
All M27C512-70C6TR 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 M27C512-70C6TR meets industry standards.
7.What is the process for return or replacement of M27C512-70C6TR?
All M27C512-70C6TR units undergo pre-shipment inspection (PSI). If there is an issue with M27C512-70C6TR, 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 M27C512-70C6TR part is unused and in its original packaging.
Return procedure for M27C512-70C6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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