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Microchip Technology AT27C010-70PC
- Part No.:
- AT27C010-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C010-70PC.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,471
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Product details
Overview
AT27C010-70PC from Atmel is a 1-Mbit (128K × 8) one-time programmable EPROM optimized for fast read access in embedded firmware storage applications. It features 45 ns read access time, 5V ±10% single-supply operation, and JEDEC-standard 32-lead PDIP packaging. Designed for microprocessor systems requiring low-latency nonvolatile code storage without wait states, it supports commercial temperature range (0°C to 70°C).
For engineers reviewing the AT27C010-70PC datasheet, AT27C010-70PC pinout, AT27C010-70PC application, or AT27C010-70PC equivalent, key selection criteria include verified 45 ns tACC timing, 35 mA active current at 5 MHz, VPP = 12.0 V programming voltage, CMOS/TTL compatibility, and integrated product identification code support.
Technical Context
The AT27C010-70PC implements a parallel-addressed OTP EPROM architecture with dual-line control (CE and OE) enabling bus contention prevention in multi-device systems. Its Rapid™ programming algorithm uses 100 µs/byte pulses with verify-reprogram loops, requiring VPP = 12.0 ± 0.5 V and VCC = 6.5 V during programming.
It delivers CMOS-level input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), TTL-compatible outputs (VOH ≥ 2.4 V at –400 µA), and robust reliability features including 2000 V ESD protection and 200 mA latchup immunity. The device supports product identification via A9 high-voltage strobe (11.5–12.5 V) and A0 toggling to select manufacturer/device code bytes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576-bit (128K × 8) OTP EPROM - provides full firmware image storage for 8-bit microcontrollers without external memory management. |
| Read Access Time | 45 ns (tACC) - eliminates WAIT states on 5 MHz Z80, 8051, and 68K-based systems. |
| VCC Supply | 5 V ±10% - compatible with standard logic rails; no auxiliary voltage required for read mode. |
| Active Current | 35 mA max at 5 MHz - defines power budget for real-time firmware fetch in continuous operation. |
| Standby Current | 100 µA max - enables low-power retention in battery-backed or sleep-mode systems. |
| Programming Voltage | VPP = 12.0 ± 0.5 V - requires dedicated programming supply; not derived from VCC. |
| Operating Temp | 0°C to 70°C - validated for commercial-grade industrial control panels and instrumentation. |
Pinout & Package
AT27C010-70PC is supplied in a 32-lead, 0.600" wide plastic dual inline package (PDIP), JEDEC MS-016 compliant, with 0.1" lead pitch and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-byte addressing; driven by microcontroller address lines. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; outputs valid within 45 ns of CE/OE assertion; high-impedance when disabled. |
| CE | Chip Enable | Active-low global enable; controls device selection in multi-chip memory maps; must be stable before address setup. |
| OE | Output Enable | Active-low output gate; allows shared bus operation with other peripherals; float timing defined as tDF = 30 ns. |
| PGM | Program Strobe | Active-low pulse input (100 µs width) initiating byte programming; requires VPP = 12 V and VCC = 6.5 V. |
| VPP | Programming Voltage | 12.0 ± 0.5 V input; must be applied after VCC and removed before VCC to prevent latchup. |
| VCC | Power Supply | +5 V ±10% main supply; powers logic and output drivers; decoupling requires 0.1 µF ceramic capacitor at pin. |
| GND | Ground Reference | Signal and power return; forms reference for all input thresholds and output levels. |
| NC | No Connect | Pin 23 (PDIP) is unconnected; must remain floating - no tie-high/low or routing allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - reduces production programming cycle time by >5× vs legacy EPROMs. |
| Integrated Product Identification Code | Manufacturer ID (0x1E) and Device Code (0x05) accessible via A9 high-voltage strobe - enables automated programmer validation and BOM traceability. |
| Two-Line Control Architecture | Independent CE and OE inputs - permits flexible memory mapping and prevents bus contention during partial decode. |
| High-Reliability Process | 2000 V HBM ESD rating and 200 mA latchup immunity - ensures robustness in manufacturing handling and field-deployed industrial environments. |
| JEDEC Standard Packaging | 32P6 PDIP footprint - guarantees drop-in compatibility with legacy EPROM sockets and PCB footprints across Atmel's 27C family. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
|
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-time code storage accessed directly by Z80 or 80C188 CPU during cold start; 45 ns tACC enables zero-wait-state execution. Use Value: Eliminates need for external wait-state generators or slower serial flash, reducing BOM count and board space in space-constrained enclosures. |
Use Scenario: Holding BIOS and peripheral initialization routines for 1990s-era embedded systems using Intel 8051 or Motorola 68HC11. IC Role / Device Role / Timing Role: Primary read-only instruction memory mapped into CPU address space; CE/OE decoding enables bank switching with RAM. Use Value: Provides deterministic 45 ns instruction fetch latency critical for real-time interrupt response in motion control and sensor polling loops. |
| Automated Test Equipment (ATE) Pattern Memory | Medical Device Diagnostic Firmware |
|
Use Scenario: Storing digital stimulus patterns and pass/fail comparison vectors in benchtop IC testers. IC Role / Device Role / Timing Role: High-speed parallel pattern source synchronized to test clock; accessed via FPGA address generator with CE-gated burst reads. Use Value: Delivers consistent 45 ns access across temperature range, ensuring timing margin integrity in 100+ MHz pattern generation clocks. |
Use Scenario: Hosting calibration coefficients and safety-critical startup diagnostics in FDA-cleared patient monitors. IC Role / Device Role / Timing Role: Immutable firmware store verified at power-on; PGM pin permanently tied low to prevent accidental reprogramming. Use Value: Meets IEC 62304 Class C software requirements via hardware-enforced write-protection and ESD-hardened interface. |
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 45 ns tACC, same PDIP-32 package, but requires VPP = 12.5 V. | Supports larger firmware images; requires updated address decoding for A17 bit. | Select when firmware exceeds 128K bytes and board layout accommodates extended address bus. |
| MX27C1000PC-45 | 1-Mbit OTP EPROM with 45 ns tACC, but uses 5 V-only programming (no VPP pin); different pinout (PGM tied internally). | Eliminates high-voltage programming supply but lacks product ID code and rapid verify capability. | Select for simplified programming infrastructure where identification and production traceability are noncritical. |
Compared with AT27C010-70PC, AT27C020-70PC doubles storage while maintaining timing and footprint, whereas MX27C1000PC-45 removes VPP complexity at the cost of programmability verification and traceability - making AT27C010-70PC optimal for high-integrity, medium-size firmware deployments.
Availability
AT27C010-70PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot ROM, and automated test equipment pattern memory requiring stable component supply and long-term obsolescence management.
Supply support for AT27C010-70PC 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT27C010(L) series was designed for reliable, low-cost firmware storage in cost-sensitive industrial and commercial systems requiring pin-compatible EPROM upgrades with enhanced programming speed and identification features.
FAQ
What is the maximum operating frequency supported by AT27C010-70PC?
The AT27C010-70PC does not operate at a clock frequency itself; instead, its 45 ns access time supports microprocessors running up to approximately 22 MHz (1/45 ns) in zero-wait-state configurations. System timing depends on CE/OE assertion timing and bus loading - actual maximum bus speed must be validated per AC characteristics table, where tCE and tOE are both 45 ns.
Can AT27C010-70PC be programmed in-circuit?
No - AT27C010-70PC requires VPP = 12.0 ± 0.5 V for programming, which is incompatible with standard 5 V system rails. In-circuit programming would risk damaging adjacent 5 V components and violates the absolute maximum rating for VPP. Programming must be performed in a dedicated EPROM programmer with isolated high-voltage supply and proper sequencing (VCC before VPP, VPP before removal).
Is AT27C010-70PC functionally compatible with AT27C010-70JC or AT27C010-70TC?
Yes - AT27C010-70PC, AT27C010-70JC (PLCC), and AT27C010-70TC (TSOP) share identical electrical specifications, timing, and pin functions. Only the package differs: PDIP (PC), PLCC (JC), and TSOP (TC). Pin-to-pin compatibility is maintained across all three, though mechanical mounting and thermal profiles differ.
Does AT27C010-70PC support automatic erase before programming?
No - AT27C010-70PC is a one-time programmable (OTP) EPROM. It has no on-chip erase capability. Cells are programmed from '1' to '0' irreversibly using Fowler-Nordheim tunneling under VPP stress. Erasure requires UV exposure in specialized equipment - not supported by this plastic-packaged device.
What decoupling capacitors are required for stable AT27C010-70PC operation?
Per Atmel's system considerations, AT27C010-70PC requires a 0.1 µF ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins. For boards with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor should also be added near the power entry point to suppress array-level supply droop during simultaneous output transitions.
AT27C010-70PC 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
AT27C010-70PC FAQ
1.How can I place an order for AT27C010-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C010-70PC 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 AT27C010-70PC reliable?
The price and inventory of AT27C010-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C010-70PC is usually 5 days.
3.What payment methods are accepted for AT27C010-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C010-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C010-70PC?
AT27C010-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C010-70PC 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 AT27C010-70PC?
For technical support, including AT27C010-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C010-70PC requirements.
6.How does Aetrix verify that AT27C010-70PC is sourced from the original manufacturer or authorized distributors?
All AT27C010-70PC 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 AT27C010-70PC meets industry standards.
7.What is the process for return or replacement of AT27C010-70PC?
All AT27C010-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C010-70PC, 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 AT27C010-70PC part is unused and in its original packaging.
Return procedure for AT27C010-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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