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Microchip Technology AT27C020-15JC
- Part No.:
- AT27C020-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27C020-15JC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,467
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Product details
Overview
AT27C020-15JC from Atmel is a 2-Mbit (256K × 8) one-time programmable EPROM with 150 ns maximum read access time, 5V ±10% supply operation, and JEDEC-standard 32-lead PLCC package. It delivers TTL/CMOS-compatible I/O, rapid programming (100 µs/byte), and supports high-reliability firmware storage in microprocessor-based industrial control systems.
For engineers reviewing the AT27C020-15JC datasheet, AT27C020-15JC pinout, AT27C020-15JC application, or AT27C020-15JC equivalent, key selection criteria include read timing (tACC = 150 ns), standby current (≤100 µA), VPP programming voltage (12.0 V ±0.5 V), and PLCC-32 thermal performance across commercial temperature range (0°C to 70°C).
Technical Context
The AT27C020-15JC implements a two-line control architecture using CE and OE for bus contention prevention, enabling flexible memory mapping in 8-bit microprocessor buses. Its OTP structure eliminates erase cycles and supports permanent firmware image retention without battery backup.
It uses high-reliability CMOS technology with 2,000V ESD protection and 200 mA latch-up immunity, and integrates a product identification code accessible via A9/VH and A0 toggling - allowing automated programming equipment to verify manufacturer (0x1E) and device code (0x86) before programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (256K × 8) - supports full firmware images for 8-bit MCUs without external paging logic |
| Read Access Time (tACC) | 150 ns max - eliminates WAIT states on Z80, 8051, and 68K-based systems operating ≤6.67 MHz |
| VCC Supply | 5V ±10% - compatible with standard logic rails; no auxiliary voltage required for read mode |
| Standby Current (ISB1) | 100 µA max - enables low-power hold state during processor sleep in portable instrumentation |
| VPP Programming Voltage | 12.0 V ±0.5 V - requires dedicated programming supply; not connected to VCC during normal operation |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded control and test equipment |
| Package | 32-lead PLCC (32J) - surface-mountable with gull-wing leads; JEDEC MS-016 AE compliant |
Pinout & Package
AT27C020-15JC is housed in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 AE outline, with gull-wing terminations and index corner marking. The package supports reflow soldering and offers mechanical robustness for vibration-prone industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus interface; selects one of 256K bytes; A0 = LSB, A17 = MSB |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus outputs; CMOS/TTL-compatible drive strength (IOL = 2.1 mA, IOH = –400 µA) |
| CE | Chip Enable | Active-low global enable; controls device power state and output driver activation |
| OE | Output Enable | Active-low output gate; allows shared bus operation with other peripherals when high |
| PGM | Program Strobe | Active-low pulse input (100 µs width) that initiates byte programming when VPP = 12 V |
| VPP | Programming Voltage | 12.0 V ±0.5 V input; must be applied after VCC and removed before VCC per programming safety sequence |
| VCC | Power Supply | +5V ±10% main supply; powers logic and outputs; supplies 25 mA max at 5 MHz active read |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling per device |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time - reduces production burn-in cycle duration by >90% vs. legacy EPROMs |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x86) readable via A9/A0 control - enables auto-algorithm selection in gang programmers |
| Two-Line Control (CE/OE) | Independent chip and output enable - prevents bus contention during partial decode or multi-peripheral addressing |
| High-Reliability CMOS Process | 2,000V HBM ESD rating and 200 mA latch-up immunity - ensures survivability in manual handling and noisy factory environments |
| JEDEC-Standard Packages | PLCC-32 (32J) footprint - supports drop-in replacement with industry-standard sockets and rework tools |
Applications
| Industrial PLC Firmware Storage | Medical Diagnostic Instrument Boot ROM |
|---|---|
Use Scenario: Stores fixed boot firmware and calibration tables in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic 150 ns read latency to 8051-based controller during cold start and watchdog recovery. Use Value: Eliminates reliance on external EEPROM or Flash; avoids firmware corruption risks from power interruption during field updates. |
Use Scenario: Holds certified diagnostic algorithm binaries and hardware initialization routines in FDA-cleared portable ultrasound units. IC Role / Device Role / Timing Role: OTP EPROM serving as immutable boot source; accessed only at power-on reset with no runtime write operations. Use Value: Meets IEC 62304 software safety requirements for Class B medical devices by guaranteeing firmware integrity over 10+ year service life. |
| Automated Test Equipment (ATE) Pattern Memory | Legacy Avionics Maintenance Terminal BIOS |
Use Scenario: Stores stimulus/response pattern sets used in semiconductor wafer probers and board-level functional testers. IC Role / Device Role / Timing Role: High-speed read-only memory mapped into tester CPU address space; accessed sequentially during pattern execution. Use Value: 150 ns tACC enables sustained 6.67 MHz burst reads - matching pattern generator clock rates without pipeline stalls. |
Use Scenario: Contains BIOS and hardware abstraction layer for ground-based maintenance terminals interfacing with aging aircraft subsystems (e.g., F-16 CNI radios). IC Role / Device Role / Timing Role: Legacy-compatible boot ROM supporting 16-bit ISA bus timing and 5V-only signaling. Use Value: PLCC-32 package and 5V operation ensure mechanical and electrical compatibility with 1990s-era motherboard designs still in service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-15PC | Same die, 32-lead PDIP (32P6) package instead of PLCC; 600-mil width; through-hole mountable | Preferred for prototyping, manual rework, or legacy PCBs with DIP footprints | Select when socket-based development or field repairability outweighs surface-mount density requirements |
| AT27C020-15TC | Same die, 32-lead TSOP (32T) package; thinner profile (1.2 mm max); lead-free compatible | Suitable for space-constrained portable or handheld equipment where height is critical | Choose for new designs targeting compact form factors and RoHS compliance; verify PCB pad layout per MO-142 BD |
Compared with AT27C020-15PC and AT27C020-15TC, the AT27C020-15JC offers superior thermal dissipation and mechanical stability in vibration-prone industrial enclosures due to its PLCC gull-wing construction, while maintaining identical timing, programming, and logic behavior across all three variants.
Availability
AT27C020-15JC is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostic instruments, and automated test equipment requiring stable component supply, long-term firmware immutability, and commercial-temperature OTP memory.
Supply support for AT27C020-15JC 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 was a U.S.-based semiconductor company specializing in microcontrollers, nonvolatile memory, and programmable logic, acquired by Microchip Technology in 2016.
The AT27C020-15JC belongs to Atmel's 27C-series OTP EPROM family, designed specifically for cost-sensitive, high-reliability firmware storage in industrial and instrumentation applications where data permanence and read speed outweigh reprogrammability needs.
FAQ
What is the maximum read access time specified for the AT27C020-15JC?
The AT27C020-15JC has a maximum read access time (tACC) of 150 ns under commercial temperature conditions (0°C to 70°C) and VCC = 5V ±10%. This value is guaranteed across all valid address and output load conditions per the AC characteristics table and applies directly to the AT27C020-15JC variant - not faster or slower speed grades.
Does the AT27C020-15JC require a separate programming voltage during normal operation?
No. The AT27C020-15JC operates on a single 5V supply during read mode. VPP (12.0 V ±0.5 V) is required only during programming and must be disconnected or held at 5V during normal system operation. The AT27C020-15JC datasheet explicitly prohibits applying VPP during read or standby modes.
Can the AT27C020-15JC be used as a direct replacement for the AT27C020-12JC in an existing design?
Yes - the AT27C020-15JC is functionally and electrically identical to the AT27C020-12JC except for its slower 150 ns access time versus 120 ns. Pinout, voltage levels, timing control signals (CE/OE/PGM), and programming algorithm are fully compatible. System timing margins must accommodate the 30 ns increase in tACC.
What package type does the AT27C020-15JC use, and is it RoHS-compliant?
The AT27C020-15JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 AE outline. While original Atmel documentation does not declare RoHS status for this specific variant, the PLCC package construction is inherently lead-free compatible; however, Aetrix Electronics provides full material declarations upon request for AT27C020-15JC shipments.
How is the product identification code read from the AT27C020-15JC?
The AT27C020-15JC identification code is read by asserting VPP = 12.0 V ±0.5 V, holding A1–A17 = VIL, setting A9 = VH (11.5–12.5 V), and toggling A0 between VIL (for Manufacturer ID = 0x1E) and VIH (for Device ID = 0x86). Outputs O0–O7 reflect the corresponding 8-bit hex code during this mode - a feature confirmed in the AT27C020-15JC datasheet section "Product Identification".
AT27C020-15JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- 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:
- 32-PLCC (13.97x11.43)
AT27C020-15JC FAQ
1.How can I place an order for AT27C020-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C020-15JC 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 AT27C020-15JC reliable?
The price and inventory of AT27C020-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C020-15JC is usually 5 days.
3.What payment methods are accepted for AT27C020-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C020-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C020-15JC?
AT27C020-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C020-15JC 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 AT27C020-15JC?
For technical support, including AT27C020-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C020-15JC requirements.
6.How does Aetrix verify that AT27C020-15JC is sourced from the original manufacturer or authorized distributors?
All AT27C020-15JC 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 AT27C020-15JC meets industry standards.
7.What is the process for return or replacement of AT27C020-15JC?
All AT27C020-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C020-15JC, 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 AT27C020-15JC part is unused and in its original packaging.
Return procedure for AT27C020-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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