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STMicroelectronics M27W512-100K6TR
- Part No.:
- M27W512-100K6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27W512-100K6TR.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,100
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Product details
Overview
M27W512-100K6TR from STMicroelectronics is a 512 Kbit (64 K × 8) one-time programmable EPROM with low-voltage read operation (2.7–3.6 V), 100 ns access time, and PLCC32 package. It functions as nonvolatile program storage in microprocessor-based systems, supports TTL-level addressing/data, and delivers 15 µA standby current for battery-sensitive applications such as portable instrumentation and legacy industrial controllers.
For engineers reviewing the M27W512-100K6TR datasheet, M27W512-100K6TR pinout, M27W512-100K6TR application, or M27W512-100K6TR equivalent, key selection criteria include OTP reliability under extended temperature (–40 to +85 °C), compatibility with M27C512 programming hardware, two-line output control for memory array bus contention avoidance, and ECOPACK® lead-free PLCC32 mechanical compliance.
Technical Context
The M27W512-100K6TR implements a CMOS-based OTP EPROM architecture with dual-control read logic: Chip Enable (E) governs power state and device selection, while Output Enable (G) independently gates data onto Q0–Q7 outputs-enabling low-power deselection of unaddressed devices in multi-chip memory arrays. Its PRESTO IIB programming algorithm applies 100 µs pulses per byte at VPP = 12.75 V and VCC = 6.25 V to achieve full array programming in ~6.5 s with guaranteed margin verification.
Electronic signature mode uses 12 V on A9 and toggling A0 to output manufacturer code 20h and device code 3Dh-enabling automatic algorithm matching in programming equipment. Standby current drops to 15 µA when E = VIH, and all outputs enter high-impedance regardless of GVPP state, ensuring clean bus isolation during inactive periods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (64 K × 8); provides fixed boot code or configuration storage without erase capability. |
| Read access time | 100 ns at VCC = 2.7–3.6 V; enables direct interface with 10 MHz microcontrollers without wait states. |
| Supply voltage (read) | 2.7–3.6 V; supports single-supply operation in battery-powered systems down to 2.7 V cutoff. |
| Standby current | 15 µA max at VCC ≤ 3.6 V; extends battery life in always-on embedded monitoring nodes. |
| Programming voltage | VPP = 12.75 V ± 0.25 V; requires dedicated programming supply but maintains compatibility with M27C512 tools. |
| Operating temperature | –40 to +85 °C; qualified for industrial control panels and automotive body electronics environments. |
| Package | PLCC32 (K suffix); surface-mountable with gull-wing leads, ECOPACK® lead-free construction. |
Pinout & Package
Package: PLCC32 (Plastic Leaded Chip Carrier, 32-pin, JEDEC MO-047AC compliant, ECOPACK® lead-free finish).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address inputs | 16-bit address bus accepting TTL-compatible levels; selects one of 65,536 bytes. |
| Q0–Q7 | Data outputs | 8-bit bidirectional data bus (output only in read/verify; input during programming). |
| E | Chip Enable | Active-low primary device select; controls power state and initiates programming pulse when pulsed low with VPP applied. |
| G | Output Enable | Active-low secondary output gate; isolates Q0–Q7 from bus independently of E, enabling multi-device contention control. |
| VPP | Program supply | 12.75 V programming voltage input; must be stable before and after VCC during programming cycles. |
| VCC | Supply voltage | 2.7–3.6 V for read; 6.25 V ± 0.25 V for programming; decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices. |
| VSS | Ground | Reference return for all signals; must be low-inductance connection to minimize transient noise. |
| A9 (ES) | Electronic signature enable | Receives 11.5–12.5 V to activate manufacturer/device code readout via Q0–Q7 on A0 toggle. |
| NC / DU | No connect / Don't use | Pins 2, 18, 26, 31 are internally unconnected; must remain floating or grounded-not driven. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + G) | Enables zero-bus-contention memory expansion: E deselects device into 15 µA standby, G gates outputs without affecting power state. |
| PRESTO IIB programming | Reduces full-array programming to ~6.5 s using margin-mode verify at elevated VCC, eliminating overprogramming and improving cell endurance. |
| Electronic signature (20h/3Dh) | Allows programming tools to auto-identify STMicroelectronics M27W512 and load correct algorithm-no manual part selection required. |
| ECOPACK® PLCC32 package | Lead-free second-level interconnect compliant with JEDEC JESD97; supports RoHS-compliant reflow and long-term reliability in industrial environments. |
| High-reliability CMOS process | 2000 V HBM ESD protection and 200 mA latch-up immunity ensure robustness in noisy factory-floor or field-deployed systems. |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module Boot ROM |
|---|---|
|
Use Scenario: Storing fixed firmware for programmable logic controllers operating in factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup code fetch at power-on; accessed via 16-bit address bus with 100 ns timing guarantee. Use Value: Eliminates need for external UV-erasable EPROM sockets and reduces BOM count by integrating reliable OTP storage directly into the controller PCB. |
Use Scenario: Holding calibration tables and initialization routines for vehicle door modules, seat controllers, and lighting ECUs. IC Role / Device Role / Timing Role: OTP configuration store interfaced to 8-bit microcontroller buses; operates across –40 to +85 °C with 2.7 V brownout tolerance. Use Value: Ensures firmware integrity over 15+ year vehicle lifetimes without risk of accidental erasure or bit corruption from EMI. |
| Medical Diagnostic Equipment BIOS | Legacy Telecom Line Card Configuration |
|
Use Scenario: Securing boot loader and safety-critical self-test routines in portable ultrasound and patient monitor systems. IC Role / Device Role / Timing Role: Read-only memory mapped at fixed address space; leverages 15 µA standby current to extend battery runtime during standby modes. Use Value: Meets IEC 62304 Class C software requirements by preventing post-deployment modification of certified firmware images. |
Use Scenario: Storing protocol stack parameters and hardware initialization sequences in telecom access multiplexers and DSLAM line cards. IC Role / Device Role / Timing Role: Pin-compatible replacement for M27C512 in existing designs; supports same programming fixtures and test vectors. Use Value: Enables drop-in migration to lower-voltage operation (2.7 V min) while maintaining full backward compatibility with legacy manufacturing infrastructure. |
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 | 5 V-only operation (4.5–5.5 V), 100 ns access, PDIP32 package; no low-voltage read capability. | Requires separate 5 V rail; unsuitable for battery-powered or mixed-voltage systems. | Select only if legacy 5 V design must avoid board redesign and programming voltage infrastructure already exists. |
| M27C512-10K6 | 5 V operation, identical PLCC32 footprint and pinout, same 100 ns speed and electronic signature (20h/3Dh). | Higher active/standby current (30 mA / 100 µA); lacks low-voltage read support below 4.5 V. | Choose when upgrading from M27C512 in existing 5 V systems where power budget allows higher ICC and no battery operation is needed. |
Compared with AM27C512-10DC and M27C512-10K6, the M27W512-100K6TR uniquely enables single-supply battery operation down to 2.7 V while retaining M27C512 programming compatibility and PLCC32 mechanical fit-making it the only viable OTP EPROM for energy-constrained industrial upgrades.
Availability
M27W512-100K6TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control module boot ROM, and medical diagnostic equipment BIOS requiring stable component supply across extended product lifecycles.
Supply support for M27W512-100K6TR 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, delivering silicon solutions for automotive, industrial, and embedded applications with emphasis on reliability and longevity.
The M27W512 belongs to ST's legacy OTP EPROM product line, designed specifically for cost-sensitive, long-lifecycle applications where firmware immutability, industrial temperature operation, and programming infrastructure reuse are critical.
FAQ
Is M27W512-100K6TR still in production or marked obsolete?
Yes, M27W512-100K6TR is officially listed as an obsolete product by STMicroelectronics as of its June 2008 datasheet revision. However, Aetrix Electronics maintains verified legacy stock with full traceability, including original ST packaging and date codes, supporting ongoing maintenance and repair of deployed systems.
Can M27W512-100K6TR be programmed on standard M27C512 programmers?
Yes-M27W512-100K6TR shares identical pinout, electronic signature (20h/3Dh), and PRESTO II programming algorithm compatibility with M27C512. It requires VPP = 12.75 V and VCC = 6.25 V during programming, matching standard M27C512 programmer settings.
What is the maximum allowed programming pulse width for reliable operation?
The datasheet specifies a nominal E pulse width of 100 µs ± 5 µs (95–105 µs) per byte in programming mode. Exceeding 105 µs risks overprogramming and reduced data retention; pulses must be precisely controlled using the PRESTO IIB flowchart's verify-before-next-pulse sequence.
Does M27W512-100K6TR support read operations at 2.5 V?
No-absolute minimum read supply voltage is 2.7 V per the datasheet's "Read mode DC characteristics" table. Operation below 2.7 V is not characterized and may result in invalid data output, increased access time variation, or failure to meet tELQV timing guarantees.
M27W512-100K6TR 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:
- 100 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)
M27W512-100K6TR FAQ
1.How can I place an order for M27W512-100K6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M27W512-100K6TR 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 M27W512-100K6TR reliable?
The price and inventory of M27W512-100K6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27W512-100K6TR is usually 5 days.
3.What payment methods are accepted for M27W512-100K6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27W512-100K6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27W512-100K6TR?
M27W512-100K6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27W512-100K6TR 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 M27W512-100K6TR?
For technical support, including M27W512-100K6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27W512-100K6TR requirements.
6.How does Aetrix verify that M27W512-100K6TR is sourced from the original manufacturer or authorized distributors?
All M27W512-100K6TR 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 M27W512-100K6TR meets industry standards.
7.What is the process for return or replacement of M27W512-100K6TR?
All M27W512-100K6TR units undergo pre-shipment inspection (PSI). If there is an issue with M27W512-100K6TR, 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 M27W512-100K6TR part is unused and in its original packaging.
Return procedure for M27W512-100K6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27W512-100K6TR Tags
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