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Microchip Technology AT27C1024-15JC
- Part No.:
- AT27C1024-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C1024-15JC.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
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Product details
Overview
AT27C1024-15JC from Atmel is a 1-Mbit (64K × 16) one-time programmable EPROM with 150 ns read access time, 5V ±10% supply operation, and dual-line control (CE/OE) for bus contention avoidance in 16-/32-bit microprocessor systems. It features Rapid™ programming at 100 µs/word, 2000V ESD protection, and operates across commercial temperature range (0°C to 70°C) in 40-lead PDIP package.
For engineers reviewing the AT27C1024-15JC datasheet, AT27C1024-15JC pinout, AT27C1024-15JC application, or AT27C1024-15JC equivalent, this page delivers verified timing specs, JEDEC-compliant package details, OTP firmware storage use cases, and direct alternatives for legacy system upgrades and industrial controller memory replacement.
Technical Context
The AT27C1024-15JC implements a CMOS-based OTP EPROM architecture with address decoding for A0–A15 and 16-bit bidirectional data outputs O0–O15. Its two-line enable scheme (CE and OE) enables high-speed read cycles without WAIT states and supports output tri-state during disable or standby modes.
Programming requires VPP = 13.0 V ±0.25 V and VCC = 6.5 V ±0.25 V, with a 100 µs PGM pulse width and verification loop per word. Product identification uses A9 voltage sensing (12.0 V ±0.5 V) and A0 toggling to select manufacturer or device code words.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (64K × 16), enabling full firmware image storage for 16-bit MCUs without external banking logic |
| Read Access Time | 150 ns max - defines minimum CPU wait-state insertion for synchronous bus interfacing |
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage regulators required |
| Standby Current | 100 µA max - supports low-power hold modes in battery-backed or energy-constrained embedded controllers |
| Active Current | 30 mA max at 5 MHz - determines thermal budget and decoupling capacitor sizing (0.1 µF ceramic + 4.7 µF bulk) |
| ESD Protection | 2000 V HBM - ensures robustness during manual handling and board-level assembly in non-EPA environments |
| Operating Range | 0°C to 70°C - validated for commercial-grade instrumentation, test equipment, and office automation systems |
Pinout & Package
AT27C1024-15JC is housed in a 40-lead, 0.600" wide plastic dual inline package (PDIP), JEDEC MS-011 AC compliant, with 2.54 mm lead pitch and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; all must be stable before CE/OE assertion to meet tAS timing |
| O0–O15 | Data Outputs | 16-bit parallel data bus; high-impedance when CE or OE is high; VOL ≤ 0.4 V at 2.1 mA sink |
| CE | Chip Enable | Primary device select; must be VIL for read/program; VIH disables outputs and reduces ICC to ISB |
| OE | Output Enable | Secondary output gate; controls data bus drive timing (tOE = 50 ns max); independent of CE for bus sharing |
| PGM | Program Strobe | Active-low pulse input (100 µs width) that initiates programming cycle when VPP = 13 V and CE = VIL |
| VPP | Programming Voltage | 13.0 V ±0.25 V input during programming; must be applied after VCC and removed before VCC per sequencing rule |
| VCC | Power Supply | 5 V ±10% main supply; powers core logic and I/O buffers; requires local 0.1 µF ceramic decoupling |
| GND (Pins 12 & 39) | Ground | Two dedicated ground pins - both must be connected to minimize ground bounce and ensure AC timing compliance |
| NC | No Connect | Pin 21 is unconnected; must remain floating - no routing or soldering permitted |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/word typical programming time with auto-verify loop - cuts firmware update duration by >5× vs. legacy EPROMs |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F1h) readable via A9/VH and A0 toggle - enables automated programmer validation |
| Two-Line Control Architecture | Independent CE and OE inputs - eliminates bus contention in multi-device systems and simplifies timing-critical read strobes |
| CMOS/TTL Input Compatibility | VIL ≤ 0.8 V, VIH ≥ 2.0 V - interoperable with both 5 V CMOS and legacy TTL buses without level-shifting circuitry |
| High-Reliability Process | 200 mA latchup immunity and 2000 V HBM ESD rating - qualified for industrial control panels and factory-floor equipment |
Applications
| Industrial PLC Firmware Storage | Legacy Test Equipment Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O mapping tables in programmable logic controllers deployed in manufacturing lines. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 150 ns read access to instruction fetch bus during cold start and runtime execution. Use Value: Eliminates reliance on slow serial EEPROM or volatile SRAM with battery backup, improving system reliability and reducing BOM count. |
Use Scenario: Holding calibration constants and self-test routines in benchtop oscilloscopes and signal generators manufactured pre-2000. IC Role / Device Role / Timing Role: OTP EPROM serving as primary firmware repository with guaranteed data retention >10 years under continuous operation. Use Value: Provides tamper-resistant, field-upgradeable code storage without requiring UV erasure infrastructure or reprogramming sockets. |
| Medical Diagnostic Instrument BIOS | Avionics Ground Support Equipment |
Use Scenario: Hosting boot firmware and safety-critical initialization sequences in portable ultrasound and ECG analyzers. IC Role / Device Role / Timing Role: Read-only memory mapped to CPU address space (64K × 16), accessed via 16-bit data bus with CE/OE handshaking. Use Value: Meets IEC 62304 Class C software requirements through immutable, traceable firmware images programmed once at factory. |
Use Scenario: Storing configuration bitstreams and diagnostic test vectors in aircraft maintenance laptops and interface adapters. IC Role / Device Role / Timing Role: Standalone OTP memory used in ruggedized ground support hardware where flash wear-out or corruption risks are unacceptable. Use Value: Delivers zero-failure-rate firmware persistence over 15+ year service life, avoiding field recalls due to memory degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-15JC | 4-Mbit (512K × 8) density, 8-bit data bus, same 150 ns speed and PDIP-40 package | Requires byte-wide addressing and separate high/low byte latching; not drop-in for 16-bit systems | Select only when migrating from 8-bit microcontrollers or adding memory expansion with multiplexed bus architecture |
| MX27C1001-15PC | Same 1-Mbit (64K × 16), 150 ns, 5 V, PDIP-40, but lacks integrated product ID and Rapid™ programming | Requires longer 500 µs/word programming time and external ID verification; no A9-based code readout | Use where cost sensitivity outweighs programming throughput and automated tool compatibility requirements |
Compared with AT27C1024-15JC, AT27C040-15JC offers higher density but narrower data path, increasing MCU interface complexity, while MX27C1001-15PC matches pinout and timing but sacrifices programmability efficiency and ID traceability - making AT27C1024-15JC optimal for 16-bit legacy upgrades demanding fast, verifiable, and identifiable firmware storage.
Availability
AT27C1024-15JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy test equipment boot ROM, and medical diagnostic instrument BIOS requiring stable component supply, long-lifecycle support, and JEDEC-standard packaging.
Supply support for AT27C1024-15JC 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, non-volatile memory, and secure authentication ICs for industrial and automotive markets.
The AT27C1024 product line was designed for high-reliability, field-programmable firmware storage in 16-/32-bit embedded systems where flash endurance or UV-erasure logistics were impractical - targeting industrial control, test instrumentation, and medical electronics.
FAQ
What is the maximum operating temperature range for the AT27C1024-15JC?
The AT27C1024-15JC is rated for commercial operation from 0°C to 70°C. This range is defined in the Ordering Information table and confirmed in the DC Operating Conditions section. It does not support industrial (−40°C to +85°C) or automotive (−40°C to +125°C) grades - those require suffixes like "-15JI" or "-15JA". The -15JC variant is strictly commercial-grade and must be thermally derated if used outside this window.
Can the AT27C1024-15JC be reprogrammed after initial programming?
No, the AT27C1024-15JC is a one-time programmable (OTP) EPROM. Once programmed, its memory cells cannot be erased or rewritten. The device lacks UV-erasable quartz window or electrical erase capability. Programming is permanent and irreversible - intended for final firmware images where field updates are unnecessary or handled externally.
What is the purpose of the VPP pin on the AT27C1024-15JC?
The VPP pin on the AT27C1024-15JC supplies +13.0 V ±0.25 V during programming operations only. It enables Fowler-Nordheim tunneling for oxide breakdown and permanent bit programming. In normal read mode, VPP must be tied to VCC (5 V). The datasheet mandates strict power sequencing: VCC must be applied before VPP and removed after VPP to prevent latchup or damage.
Does the AT27C1024-15JC support 8-bit data bus interfaces?
No, the AT27C1024-15JC is strictly a 16-bit-wide device with O0–O15 outputs and A0–A15 address inputs. It has no 8-bit mode or byte-enable functionality. Systems requiring 8-bit access must implement external demultiplexing or select an 8-bit-part like AT27C040-15JC - the AT27C1024-15JC's architecture assumes full 16-bit parallel data transfer.
How is the Integrated Product Identification Code read from the AT27C1024-15JC?
The Integrated Product Identification Code is read by setting A9 to 12.0 V ±0.5 V (VID), holding A1–A15 low, and toggling A0 between VIL and VIH. When A0 = VIL, the Manufacturer ID (001Eh) appears on O15–O0; when A0 = VIH, the Device Code (00F1h) appears. This occurs during normal read mode with CE and OE asserted - no special programming voltage is needed for ID readback.
AT27C1024-15JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 1Mbit
- Memory Organization:
- 64K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 150 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27C1024-15JC FAQ
1.How can I place an order for AT27C1024-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C1024-15JC 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 AT27C1024-15JC reliable?
The price and inventory of AT27C1024-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C1024-15JC is usually 5 days.
3.What payment methods are accepted for AT27C1024-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C1024-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C1024-15JC?
AT27C1024-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C1024-15JC 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 AT27C1024-15JC?
For technical support, including AT27C1024-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C1024-15JC requirements.
6.How does Aetrix verify that AT27C1024-15JC is sourced from the original manufacturer or authorized distributors?
All AT27C1024-15JC 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 AT27C1024-15JC meets industry standards.
7.What is the process for return or replacement of AT27C1024-15JC?
All AT27C1024-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C1024-15JC, 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 AT27C1024-15JC part is unused and in its original packaging.
Return procedure for AT27C1024-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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