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Microchip Technology AT27C010-45PU
- Part No.:
- AT27C010-45PU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C010-45PU.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,146
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Product details
Overview
AT27C010-45PU from Atmel is a 128K × 8-bit one-time programmable EPROM (OTP EPROM) with 45 ns read access time, 5V ±10% supply operation, and JEDEC-standard 32-lead PDIP package. It delivers high-speed firmware storage for microprocessor systems without wait states and supports commercial temperature range (0°C to 70°C). Its Rapid™ programming algorithm enables 100 µs/byte typical write speed.
For engineers reviewing the AT27C010-45PU datasheet, AT27C010-45PU pinout, AT27C010-45PU application, or AT27C010-45PU equivalent, key selection criteria include verified 45 ns tACC timing, VPP = 12.0 V programming voltage, CMOS/TTL compatibility, 2000V ESD protection, and industrial-grade latchup immunity (200 mA).
Technical Context
The AT27C010-45PU implements a parallel-addressed OTP EPROM architecture with dual-line control (CE and OE) to prevent bus contention during read cycles. Its internal array is organized as 128K words × 8 bits, accessed via 17 address lines (A0–A16) and 8 bidirectional data outputs (O0–O7).
It operates in five distinct modes-Read, Output Disable, Standby, Rapid Program, and PGM Verify-each defined by specific logic levels on CE, OE, and PGM pins. Programming requires VPP = 12.0 ± 0.5 V applied to pin 18, while read mode uses only VCC = 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576-bit (128K × 8), enabling full firmware image storage for 8-bit microcontrollers |
| Read Access Time (tACC) | 45 ns max - eliminates WAIT states in 5 MHz Z80, 8086, and 68000-based systems |
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails without regulation overhead |
| Standby Current (ISB1) | 100 µA max - supports low-power hold states in battery-backed or intermittent-read applications |
| Active Current (ICC) | 35 mA max at 5 MHz - defines thermal budget for dense EPROM arrays on PCBs |
| VPP Programming Voltage | 12.0 ± 0.5 V - required on pin 18 during programming; must be applied after VCC and removed before VCC |
| ESD Protection | 2000 V HBM - ensures robustness during manual handling and board assembly |
Pinout & Package
AT27C010-45PU is supplied in a 32-lead, 0.600" wide plastic dual inline package (PDIP), per JEDEC MS-016 AE outline. Pin 1 is marked by a notch or dot; package height is 0.220" (5.59 mm) max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus interface; A0 = LSB, A16 = MSB; all must be stable before CE/OE assertion |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; outputs driven only when CE = VIL and OE = VIL |
| CE | Chip Enable | Primary device select; high-Z output when CE = VIH, regardless of OE state |
| OE | Output Enable | Secondary output gate; controls data bus drive only when CE = VIL |
| PGM | Program Strobe | Active-low pulse input (100 µs width) that initiates byte programming when VPP = 12 V |
| VPP | Programming Voltage | 12.0 V input (pin 18); must be externally supplied during programming; tied to VCC in read mode |
| VCC | Power Supply | +5 V supply (pin 28); powers logic and memory array in read mode; must be applied before VPP |
| GND | Ground | Reference return (pin 16); requires local 0.1 µF ceramic decoupling capacitor |
| NC | No Connect | Pin 24 (PDIP) - internally unconnected; must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time reduces production burn-in cycle duration by >70% vs. legacy EPROMs |
| Integrated Product Identification Code | Manufacturer ID (0x1E) and Device Code (0x05) readable via A9/VH and A0 toggle - enables auto-algorithm selection in gang programmers |
| Two-Line Control Architecture | Independent CE and OE inputs allow flexible bus arbitration and partial-memory disable without external logic |
| High-Reliability Process | 200 mA latchup immunity and 2000 V HBM ESD rating ensure survival in industrial test and rework environments |
| JEDEC Standard Packaging | 32P6 PDIP footprint ensures drop-in compatibility with legacy sockets and wave-solder tooling |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O mapping tables in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space; accessed at power-on reset and during firmware updates. Use Value: 45 ns tACC enables direct execution from EPROM on 80C188EB-based controllers without wait-state insertion, reducing BOM count. |
Use Scenario: Providing immutable startup code for 8-bit embedded systems such as point-of-sale terminals and medical instrument controllers. IC Role / Device Role / Timing Role: Primary boot ROM executing initialization routines prior to RAM initialization and peripheral configuration. Use Value: 5V-only read operation and TTL/CMOS compatibility eliminate level-shifter requirements in legacy 8051 and Z80 designs. |
| Automotive Instrument Cluster Calibration Data | Test Equipment PROM Replacement |
Use Scenario: Holding calibrated sensor offsets and display lookup tables in analog/digital automotive dashboards operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Read-only configuration store accessed via dedicated memory-mapped I/O port during cluster power-up sequence. Use Value: Industrial temperature grade (-40°C to +85°C) and 200 mA latchup immunity meet AEC-Q100 stress requirements for non-safety-critical modules. |
Use Scenario: Replacing obsolete 27C256 and 27C512 EPROMs in automated test equipment mainframes requiring field-programmable firmware patches. IC Role / Device Role / Timing Role: Field-upgradable firmware repository supporting in-system programming via IEEE-488 or RS-232 host interface. Use Value: Rapid™ programming and integrated ID code enable fully automated verification and algorithm selection in benchtop programmers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-45PU | 256K × 8-bit capacity; identical 45 ns tACC, same PDIP-32 package, but requires VPP = 12.5 V | Supports larger firmware images; not pin-compatible due to additional address line A17 (pin 32 repurposed) | Select when firmware exceeds 128 KB and board layout allows A17 routing |
| MX27C1000PC-45 | Same 128K × 8 organization and 45 ns speed; 32-pin PDIP; VPP = 12.5 V; no integrated ID code | Lacks manufacturer/device identification byte; requires manual algorithm selection in programmers | Choose for cost-sensitive replacements where programmer flexibility exists and ID code is unused |
Compared with AT27C010-45PU, AT27C020-45PU doubles capacity but requires PCB-level A17 signal routing, while MX27C1000PC-45 offers identical pinout and timing but omits the electronic ID feature critical for automated programming workflows.
Availability
AT27C010-45PU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot ROM, automotive instrument cluster calibration, and test equipment PROM replacement requiring stable component supply across extended lifecycle programs.
Supply support for AT27C010-45PU 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 nonvolatile memory, microcontrollers, and secure authentication ICs.
The AT27C010(L) product line was designed for high-reliability, field-programmable firmware storage in industrial, automotive, and legacy computing systems requiring long-term data retention and proven OTP architecture.
FAQ
What is the maximum allowed VPP voltage for programming the AT27C010-45PU?
The AT27C010-45PU requires VPP = 12.0 ± 0.5 V during programming, meaning the absolute maximum is 12.5 V. Exceeding this risks oxide breakdown in the floating-gate cells. The datasheet specifies VID (A9 identification voltage) tolerance as 11.5–12.5 V, confirming 12.5 V as the upper limit. Always apply VPP after VCC and remove it before VCC to avoid overstress conditions.
Does the AT27C010-45PU support automatic identification in programming equipment?
Yes, the AT27C010-45PU includes an Integrated Product Identification Code: Manufacturer ID = 0x1E and Device Code = 0x05. These are read by asserting VH (12 V) on A9 and toggling A0 while holding all other address lines low. This feature enables industry-standard programmers like BP Microsystems and Xeltek to auto-select correct algorithms and voltages without manual configuration.
Can the AT27C010-45PU operate with only a 5 V supply, or is VPP required during normal read mode?
The AT27C010-45PU operates in read mode using only VCC = 5 V ±10%; VPP is not required and may be tied to VCC (5 V) during read operations. VPP = 12 V is needed exclusively during programming and verification cycles. The datasheet explicitly states "VPP may be connected directly to VCC, except during programming," confirming safe 5 V-only read functionality.
What decoupling capacitance is required for stable operation of the AT27C010-45PU?
Each AT27C010-45PU requires a 0.1 µF high-frequency ceramic capacitor placed between VCC (pin 28) and GND (pin 16), mounted as close to the device as possible. For boards with multiple AT27C010-45PU devices, a shared 4.7 µF bulk electrolytic capacitor should also be placed near the power entry point. These values are specified in the "System Considerations" section to suppress transient excursions during CE switching.
Is the AT27C010-45PU pin-compatible with the AT27C010L-45PU?
No, the AT27C010-45PU and AT27C010L-45PU are not pin-compatible replacements. While both share the same PDIP-32 package and pinout, they differ in active current: AT27C010 draws up to 35 mA, whereas AT27C010L draws only 25 mA. More critically, their programming characteristics (e.g., ICC2, IPP2) and recommended VCC/VPP sequencing differ, making direct substitution unsafe without validation.
AT27C010-45PU 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:
- 45 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT27C010-45PU FAQ
1.How can I place an order for AT27C010-45PU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C010-45PU 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 AT27C010-45PU reliable?
The price and inventory of AT27C010-45PU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C010-45PU is usually 5 days.
3.What payment methods are accepted for AT27C010-45PU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C010-45PU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C010-45PU?
AT27C010-45PU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C010-45PU 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 AT27C010-45PU?
For technical support, including AT27C010-45PU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C010-45PU requirements.
6.How does Aetrix verify that AT27C010-45PU is sourced from the original manufacturer or authorized distributors?
All AT27C010-45PU 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 AT27C010-45PU meets industry standards.
7.What is the process for return or replacement of AT27C010-45PU?
All AT27C010-45PU units undergo pre-shipment inspection (PSI). If there is an issue with AT27C010-45PU, 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 AT27C010-45PU part is unused and in its original packaging.
Return procedure for AT27C010-45PU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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