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Microchip Technology AT27C1024-15PI
- Part No.:
- AT27C1024-15PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C1024-15PI.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
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Product details
Overview
AT27C1024-15PI from Atmel is a 1-Mbit (64K × 16) one-time programmable EPROM with 40-pin PDIP packaging, 150 ns read access time, 5V ±10% supply, and dual-line control (CE/OE). It serves as non-volatile firmware storage in legacy microprocessor systems requiring pin-compatible upgrade from AT27C516.
For engineers reviewing the AT27C1024-15PI datasheet, AT27C1024-15PI pinout, AT27C1024-15PI application, or AT27C1024-15PI equivalent, this page delivers verified timing specs, industrial temperature support (−40°C to +85°C), Rapid™ programming algorithm details, JEDEC-compliant package dimensions, and real-world system integration considerations including decoupling capacitor requirements.
Technical Context
The AT27C1024-15PI operates in five distinct modes-Read, Output Disable, Standby, Rapid Program, and PGM Verify-controlled by CE, OE, and PGM signals with VPP = 13.0 V during programming. Its 64K × 16 organization enables byte-wide or word-wide data access without external multiplexing in 16-bit bus architectures.
It features integrated product identification (A9-driven voltage-selectable Manufacturer ID and Device Code), CMOS/TTL-compatible I/O, 2000V ESD protection, and latchup immunity up to 200 mA. The device requires simultaneous VCC/VPP sequencing and mandates 0.1 µF ceramic decoupling per unit plus bulk 4.7 µF stabilization for multi-device arrays.
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 bank switching |
| Read Access Time | 150 ns max - eliminates WAIT states in 6–7 MHz Z80/8086-class systems |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required in read mode |
| Standby Current | 100 µA max (CMOS CE input) - supports low-power hold states in battery-backed systems |
| Active Current | 30 mA max at 5 MHz - defines thermal budget for dense EPROM arrays on PCBs |
| Programming Voltage | VPP = 13.0 V ±0.25 V - requires dedicated high-voltage supply; not derived from VCC |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, instrumentation, and telecom line cards |
Pinout & Package
AT27C1024-15PI uses a 40-lead, 0.600" wide plastic dual inline package (PDIP), JEDEC MS-011 AC compliant, with 0.1" lead pitch and through-hole mounting. Both GND pins (Pin 12 and Pin 28) must be connected for stable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; latched internally on CE low; A0 toggles between Manufacturer ID and Device Code modes |
| O0–O15 | Data Outputs | True TTL/CMOS-compatible bidirectional outputs; high-impedance when OE or CE high |
| CE | Chip Enable | Primary device select; active-low; controls internal array enable and power state transition |
| OE | Output Enable | Secondary output gate; active-low; allows shared bus operation with CE managing chip selection |
| PGM | Program Strobe | Active-low pulse input (100 µs ±5%) initiating single-word programming under VPP = 13 V |
| VPP | Programming Voltage | 13.0 V ±0.25 V input; must be applied after VCC and removed before VCC; requires 0.1 µF local bypass |
| VCC | Power Supply | 5V ±10% main supply; powers logic and outputs; supplies current for both read and program modes |
| GND | Ground | Two dedicated ground pins (12 and 28); both must be soldered to minimize noise and ensure latchup immunity |
| NC | No Connect | Pin 21 is unconnected; must remain floating - no pull-up/down or routing allowed |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/word typical programming time with auto-verify loop - reduces firmware burn time by >5× vs legacy EPROMs |
| Integrated Product Identification | Electrically readable Manufacturer ID (001Eh) and Device Code (00F1h) via A9/VH and A0 toggle - enables automated programmer validation |
| Dual-Line Control Architecture | Independent CE and OE inputs - eliminates bus contention in multi-device systems and supports memory-mapped I/O |
| High-Reliability Process | 2000V HBM ESD rating and 200 mA latchup immunity - ensures robustness in manufacturing handling and field deployment |
| JEDEC-Standard Packaging | 40P6 PDIP footprint - enables drop-in replacement of AT27C516 and compatibility with legacy socketed designs |
Applications
| Industrial PLC Firmware Storage | Legacy Test Equipment Boot ROM |
|---|---|
Use Scenario: Fixed-function programmable logic controllers require immutable boot code and configuration tables stored across decades of field service. IC Role / Device Role / Timing Role: Non-volatile firmware storage with 150 ns access supporting deterministic scan-cycle execution in 80C186-based controllers. Use Value: Eliminates need for external wait-state generators; withstands industrial temperature cycling and EMI-rich factory environments. |
Use Scenario: Automated test systems use hard-coded calibration routines and instrument initialization sequences that must persist across power cycles. IC Role / Device Role / Timing Role: Read-only memory mapped at fixed address range; accessed during power-on reset sequence prior to RAM initialization. Use Value: Guarantees bit-identical firmware execution across units; avoids flash wear-out or configuration drift over 10+ year deployments. |
| Avionics Maintenance Terminal BIOS | Medical Imaging System Bootloader |
Use Scenario: Ground-based avionics diagnostic terminals store aircraft-specific communication protocols and fault-decoding logic in tamper-resistant hardware. IC Role / Device Role / Timing Role: OTP EPROM holding certified bootloader code; verified at production and never updated in field. Use Value: Meets DO-254 traceability requirements; immune to accidental reprogramming or corruption during maintenance operations. |
Use Scenario: CT/MRI subsystems rely on hardened boot firmware to initialize FPGA configuration, sensor interfaces, and safety watchdogs before imaging starts. IC Role / Device Role / Timing Role: Primary boot device executing within first 200 µs of power-up; provides deterministic startup latency. Use Value: Delivers guaranteed 150 ns read timing and −40°C to +85°C operation required for medical-grade thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C1024-15JI | Same die, identical timing and pinout, but packaged in 44-lead PLCC (44J) instead of PDIP | Requires surface-mount assembly and different socket; better thermal dissipation but higher board cost | Select when upgrading legacy designs to SMT or when space-constrained layouts prohibit through-hole components |
| AM27C1024-15DC | AMD second-source version; same 150 ns access, 5V supply, and 40-pin PDIP; minor differences in programming voltage tolerance (12.5–13.5 V) | Validated in same industrial temperature range; requires verification of programmer compatibility due to VID threshold variance | Choose for supply chain diversification where Atmel sourcing is constrained; verify VID setup in programming flow |
Compared with AT27C1024-15PI, the AT27C1024-15JI offers superior thermal performance in high-density layouts but demands PCB redesign, while AM27C1024-15DC provides direct functional equivalence with minimal qualification overhead if AMD programming tools are already deployed.
Availability
AT27C1024-15PI is available at Aetrix Electronics and suitable for industrial control, legacy test equipment, and avionics maintenance terminals requiring stable component supply across extended product lifecycles.
Supply support for AT27C1024-15PI 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 was a U.S.-based semiconductor designer specializing in microcontrollers, non-volatile memory, and secure authentication ICs before its acquisition by Microchip Technology in 2016.
The AT27C1024 series was developed as a high-reliability, pin-compatible OTP EPROM upgrade path for 512K-bit predecessors, targeting long-lifecycle industrial and aerospace applications where firmware immutability and JEDEC-standard packaging were critical.
FAQ
What is the maximum operating temperature range for the AT27C1024-15PI?
The AT27C1024-15PI is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the Ordering Information table on page 10 of the official datasheet, where "-15PI" explicitly denotes the Industrial grade variant with 40P6 (PDIP) packaging. It is not rated for automotive (−40°C to +125°C) or extended commercial ranges.
Does the AT27C1024-15PI require a separate programming voltage during normal read operation?
No, the AT27C1024-15PI operates from a single 5V ±10% supply (VCC) during read mode. VPP = 13.0 V is required only during programming and verification cycles. In standby or read modes, VPP may be tied to VCC, though doing so increases standby current slightly per datasheet Note 5 on page 4.
Can the AT27C1024-15PI be used as a direct replacement for the AT27C516 in existing designs?
Yes - the AT27C1024-15PI is explicitly designed as a direct upgrade from the AT27C516 (512K-bit EPROM). It shares identical pinout, voltage levels, control signal behavior (CE/OE/PGM), and PDIP packaging. The only design change needed is widening the address bus from A0–A14 to A0–A15 and updating firmware size allocation.
What decoupling capacitors are required for stable operation of the AT27C1024-15PI?
The AT27C1024-15PI requires two decoupling capacitors: a 0.1 µF high-frequency ceramic capacitor placed directly between VCC and GND pins (12 and 28), and a 4.7 µF bulk electrolytic capacitor located near the power entry point of any array containing multiple AT27C1024-15PI devices. These values are specified in the "System Considerations" section on page 2.
How is the product identification code read from the AT27C1024-15PI?
The AT27C1024-15PI's identification code is accessed by setting A9 to VH = 12.0 V ±0.5 V (VID = 11.5–12.5 V), holding A1–A15 low, and toggling A0: low selects the Manufacturer ID (001Eh), high selects the Device Code (00F1h). Outputs O15–O0 reflect the 16-bit hex value, as shown in the "Atmel's 27C1024 Integrated Product Identification Code" table on page 8.
AT27C1024-15PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-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:
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 40-PDIP
AT27C1024-15PI FAQ
1.How can I place an order for AT27C1024-15PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C1024-15PI 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 AT27C1024-15PI reliable?
The price and inventory of AT27C1024-15PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C1024-15PI is usually 5 days.
3.What payment methods are accepted for AT27C1024-15PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C1024-15PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C1024-15PI?
AT27C1024-15PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C1024-15PI 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 AT27C1024-15PI?
For technical support, including AT27C1024-15PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C1024-15PI requirements.
6.How does Aetrix verify that AT27C1024-15PI is sourced from the original manufacturer or authorized distributors?
All AT27C1024-15PI 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 AT27C1024-15PI meets industry standards.
7.What is the process for return or replacement of AT27C1024-15PI?
All AT27C1024-15PI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C1024-15PI, 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 AT27C1024-15PI part is unused and in its original packaging.
Return procedure for AT27C1024-15PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C1024-15PI Tags
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