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Microchip Technology AT27C010L-70PC
- Part No.:
- AT27C010L-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C010L-70PC.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,131
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Product details
Overview
AT27C010L-70PC from Atmel is a 1-Mbit (128K × 8) one-time programmable EPROM optimized for low-power embedded firmware storage, featuring 70 ns read access time, 5V ±10% single-supply operation, and industrial temperature range (–40°C to +85°C) in 32-lead PDIP package. It delivers 25 mA active current at 5 MHz and <100 µA standby current, enabling direct replacement of mask ROM or UV-EPROM in microcontroller boot memory and BIOS applications.
For engineers reviewing the AT27C010L-70PC datasheet, AT27C010L-70PC pinout, AT27C010L-70PC application, or AT27C010L-70PC equivalent, key selection criteria include verified 70 ns tACC timing, VPP = 12.0 V programming voltage, Rapid™ 100 µs/byte algorithm support, JEDEC-standard 32P6 PDIP footprint compatibility, and integrated product identification code for automated programming validation.
Technical Context
The AT27C010L-70PC implements a CMOS OTP EPROM architecture with dual-line control (CE/OE), supporting fast random-access reads without WAIT states in 8-bit microprocessor buses. Its address decoding covers A0–A16 (128K locations), with dedicated PGM strobe and VPP pin for high-voltage programming.
It uses Atmel's Rapid™ Programming Algorithm requiring precise 100 µs ±5% PGM pulses at VPP = 13.0 V and VCC = 6.5 V, followed by verify cycles per byte. The integrated product identification code (Manufacturer ID = 0x1E, Device ID = 0x05) is accessed via A9 = 12.0 V and A0 toggling, enabling programmer auto-detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576-bit (128K × 8) OTP EPROM - supports full firmware image storage for 8-bit MCUs without external buffering. |
| Read Access Time (tACC) | 70 ns max - ensures no WAIT states required on 14 MHz Z80 or 12 MHz 8051 bus systems. |
| VCC Supply | 5 V ±10% - compatible with standard logic rails; no auxiliary voltage regulators needed. |
| Active Current (ICC) | 25 mA max at 5 MHz - enables use in power-constrained industrial controllers with thermal budget ≤125 mW. |
| Standby Current (ISB) | 100 µA max - allows battery-backed retention in low-power sleep modes for >1 year on coin cell. |
| Programming Voltage (VPP) | 12.0 V ±0.5 V - requires dedicated HV generator; not compatible with 5 V-only programmers. |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor drives, and HVAC control environments. |
Pinout & Package
AT27C010L-70PC is supplied in a 32-lead, 0.600" wide plastic dual inline package (PDIP), JEDEC MS-011 compliant, with 0.1" lead pitch and through-hole mounting. Package dimensions: 1.20" × 0.600" × 0.220" (30.5 mm × 15.2 mm × 5.6 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus accepting 0–131071 decimal; A0 LSB, A16 MSB - directly interfaces to 8085/8086/Z80 address latches. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output only); TTL/CMOS-compatible VOH ≥2.4 V, VOL ≤0.4 V at 2.1 mA load. |
| CE | Chip Enable | Active-low global enable; must be stable before OE to avoid bus contention; controls power state transition. |
| OE | Output Enable | Active-low output gate; decouples outputs from bus during read cycles when CE is asserted but OE is inactive. |
| PGM | Program Strobe | Active-low pulse input triggering 100 µs programming window; requires synchronized VPP rise prior to assertion. |
| VPP | Programming Voltage | 12.0 V ±0.5 V input during programming; must be applied after VCC and removed before VCC to prevent latchup. |
| VCC | Power Supply | +5 V ±10% main supply; powers logic and outputs; requires 0.1 µF ceramic bypass capacitor at pin. |
| GND | Ground | Signal and power reference; separate ground plane recommended for noise-sensitive read operations. |
| NC | No Connect | Pins 18 and 27 in PDIP are unconnected - must remain floating; no PCB trace or pull-up/pull-down. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - reduces firmware update cycle time by >8× vs. legacy EPROMs. |
| Integrated Product Identification Code | Manufacturer ID (0x1E) and Device ID (0x05) readable via A9=12 V and A0 toggle - enables plug-and-play programmer compatibility. |
| Two-Line Control Architecture | Independent CE and OE inputs - allows flexible bus arbitration in multi-device systems without external logic. |
| High-Reliability Process | 2000 V HBM ESD rating and 200 mA latchup immunity - suitable for manufacturing environments with minimal handling controls. |
| JEDEC Standard Packages | 32P6 PDIP footprint - ensures drop-in replacement for obsolete 27C256, 27C512, and 27C020 in legacy designs. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot Memory |
|---|---|
Use Scenario: Storing ladder logic interpreter and I/O configuration tables in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile boot ROM providing immediate instruction fetch at power-on reset; 70 ns tACC aligns with 12 MHz CPU clock. Use Value: Eliminates need for external EEPROM write sequencing; retains firmware across 100k+ power cycles with zero data corruption risk. |
Use Scenario: Holding startup code and peripheral initialization routines for Z80-based medical instrument controllers. IC Role / Device Role / Timing Role: Primary 8-bit data/address-mapped memory mapped at 0x0000–0x1FFFF; CE tied to address decoder output. Use Value: Enables deterministic boot within 200 µs; 25 mA active current avoids thermal derating in sealed enclosures. |
| Automotive Diagnostic Module BIOS | Point-of-Sale Terminal Kernel Image |
Use Scenario: Storing OBD-II protocol stack and calibration data in vehicle service tools operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Read-only firmware repository accessed via 8051 bus; OE controlled by microcontroller GPIO. Use Value: Industrial temp grade ensures reliable operation during engine bay exposure; 100 µA standby draws <1 µW in sleep mode. |
Use Scenario: Hosting secure payment kernel and cryptographic keys in PCI-compliant retail terminals with tamper-evident housing. IC Role / Device Role / Timing Role: OTP-locked execution image preventing runtime modification; programmed once during factory burn-in. Use Value: Physical one-time programmability blocks firmware rollback attacks; integrated ID code validates authenticity during boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-70PC | 2-Mbit (256K × 8) capacity; identical 70 ns tACC, same 32P6 PDIP package and pinout. | Supports larger firmware images; requires wider address bus (A0–A17) and updated decode logic. | Select when firmware exceeds 128K bytes and board layout accommodates A17 routing. |
| AM27C010-70DC | Same 1-Mbit density and 70 ns speed, but AMD-manufactured; VPP = 12.5 V, ICC = 30 mA (vs. 25 mA). | Higher active current increases thermal load; requires verification of 12.5 V VPP compatibility with existing programmer. | Choose only if AM27C010-70DC is already qualified in your production line and VPP margin permits. |
Compared with AT27C010L-70PC, AT27C020-70PC doubles storage without timing penalty but demands hardware changes, while AM27C010-70DC offers second-source availability at the cost of higher power and tighter VPP tolerance - making AT27C010L-70PC optimal for thermally constrained, cost-sensitive industrial designs.
Availability
AT27C010L-70PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot memory, and automotive diagnostic module BIOS requiring stable component supply over extended production lifecycles.
Supply support for AT27C010L-70PC 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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and security ICs for industrial, automotive, and consumer applications.
The AT27C010(L) series was designed as a low-power, high-reliability OTP EPROM replacement for UV-erasable EPROMs in cost-sensitive embedded systems where firmware immutability and long-term data retention are critical.
FAQ
What is the maximum programming voltage (VPP) specification for AT27C010L-70PC?
The AT27C010L-70PC requires VPP = 12.0 V ± 0.5 V during programming, with strict sequencing: VCC must be applied before VPP and removed after VPP. Exceeding 12.5 V risks permanent damage, and undershooting 11.5 V causes incomplete programming. This specification is confirmed in the DC Programming Characteristics table on page 6 of the official Atmel datasheet Rev. 0321J–07/98.
Does AT27C010L-70PC support automatic identification by industry-standard programmers?
Yes, AT27C010L-70PC implements an Integrated Product Identification Code accessible via A9 = 12.0 V and A0 toggling, returning Manufacturer ID 0x1E and Device ID 0x05. This allows compliant programmers (e.g., BP Microsystems, Xeltek) to auto-detect the part, select correct algorithms, and validate programming voltage - eliminating manual setup errors for AT27C010L-70PC.
Can AT27C010L-70PC be used as a direct replacement for AT27C010-70PC in existing designs?
Yes, AT27C010L-70PC is pin-compatible and functionally identical to AT27C010-70PC except for lower active current (25 mA vs. 35 mA at 5 MHz) and reduced standby current (<100 µA vs. 1 mA). No PCB or firmware changes are required; the "L" variant improves thermal performance and extends battery life in portable applications using AT27C010L-70PC.
What is the minimum recommended bypass capacitance for AT27C010L-70PC?
Atmel specifies a minimum 0.1 µF high-frequency ceramic capacitor between VCC and GND, placed as close as possible to the AT27C010L-70PC pins. For systems with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor is also required near the power entry point. These values prevent transient-induced non-conformance during CE transitions, as detailed in the "System Considerations" section of the AT27C010L-70PC datasheet.
Is AT27C010L-70PC qualified for automotive applications?
No, AT27C010L-70PC is rated for industrial temperature range (–40°C to +85°C), not automotive (–40°C to +125°C). While the "L" suffix denotes low-power operation, automotive qualification requires specific ordering codes like AT27C010-70PA (for PDIP) with "A" suffix and extended temp testing. Using AT27C010L-70PC in under-hood environments voids reliability guarantees and violates AEC-Q100 requirements.
AT27C010L-70PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT27C010L-70PC FAQ
1.How can I place an order for AT27C010L-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C010L-70PC 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 AT27C010L-70PC reliable?
The price and inventory of AT27C010L-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C010L-70PC is usually 5 days.
3.What payment methods are accepted for AT27C010L-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C010L-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C010L-70PC?
AT27C010L-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C010L-70PC 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 AT27C010L-70PC?
For technical support, including AT27C010L-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C010L-70PC requirements.
6.How does Aetrix verify that AT27C010L-70PC is sourced from the original manufacturer or authorized distributors?
All AT27C010L-70PC 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 AT27C010L-70PC meets industry standards.
7.What is the process for return or replacement of AT27C010L-70PC?
All AT27C010L-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C010L-70PC, 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 AT27C010L-70PC part is unused and in its original packaging.
Return procedure for AT27C010L-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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