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Microchip Technology AT27C020-15TI
- Part No.:
- AT27C020-15TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT27C020-15TI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
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Product details
Overview
AT27C020-15TI from Atmel is a 2-Mbit (256K × 8) one-time programmable EPROM designed for firmware storage in microprocessor systems. It delivers 150 ns read access time, operates from a single 5V ±10% supply, and supports industrial temperature range (–40°C to +85°C). Its dual-line control (CE/OE), CMOS/TTL compatibility, and Rapid™ programming (100 µs/byte) enable reliable boot code retention in embedded controllers and legacy industrial controllers.
For engineers reviewing the AT27C020-15TI datasheet, AT27C020-15TI pinout, AT27C020-15TI application, or AT27C020-15TI equivalent, key selection criteria include read access timing, OTP reliability, VPP programming voltage handling (12.0 V ±0.5 V), standby current (≤100 µA), and JEDEC-standard PLCC-32 packaging confirmed for this variant.
Technical Context
The AT27C020-15TI implements a standard OTP EPROM architecture with address decoding across A0–A17 (18-bit), 8-bit parallel data outputs (O0–O7), and dedicated control pins CE, OE, and PGM. It uses high-reliability CMOS technology with 2,000V ESD protection and 200 mA latch-up immunity.
Its read mode requires only VCC = 5V ±10%; programming demands elevated VPP = 12.0 V ±0.5 V and VCC = 6.5 V ±0.25 V. The integrated Product Identification Code (Manufacturer ID = 0x1E, Device ID = 0x86) enables automated programmer recognition during production programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (256K × 8); sufficient for full boot ROM or firmware image in 8-bit/16-bit microcontrollers. |
| Read Access Time | 150 ns max; eliminates WAIT states in 5 MHz Z80, 8051, or 68K-based systems with tight timing budgets. |
| VCC Supply | 5V ±10%; compatible with standard logic rails without auxiliary regulators. |
| Standby Current | 100 µA max; enables low-power retention in always-on industrial control modules. |
| VPP Programming Voltage | 12.0 V ±0.5 V; requires dedicated programming supply but avoids external charge pumps. |
| Operating Temperature | –40°C to +85°C; qualified for industrial environments including PLC backplanes and motor drives. |
| Input Compatibility | CMOS- and TTL-compatible I/O; interoperable with legacy 74LS, HC, and HCT logic families without level shifters. |
Pinout & Package
AT27C020-15TI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), per JEDEC MS-016 AE. Pin 1 is marked by index notch; package body dimensions are 18.5 mm × 18.3 mm × 4.09 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus interface; selects one of 256K byte locations; driven by MPU address lines. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus outputs in read mode; high-impedance when CE or OE inactive. |
| CE | Chip Enable | Active-low global enable; must be asserted before OE to avoid bus contention in multi-device systems. |
| OE | Output Enable | Active-low output gate; decouples memory data from bus when deasserted, enabling shared bus arbitration. |
| PGM | Program Strobe | Active-low pulse input (100 µs width) that initiates byte programming when VPP is active. |
| VPP | Programming Voltage | 12.0 V ±0.5 V input required only during programming; must be applied after and removed before VCC. |
| VCC | Power Supply | 5V ±10% main supply; powers read operations and internal logic; supplies 25 mA max at 5 MHz active current. |
| GND | Ground Reference | Signal and power return path; requires local 0.1 µF ceramic decoupling per device per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop; reduces production burn-in cycle time by >5× vs. legacy EPROMs. |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x86) accessible via A9/VH and A0 toggle; enables zero-configuration detection in automated programmers. |
| Two-Line Control Architecture | Independent CE and OE inputs allow flexible bus timing-OE can be delayed up to tACC − tOE after address valid without affecting access time. |
| High-Reliability Process | 2,000V HBM ESD rating and 200 mA latch-up immunity ensure robustness in manufacturing handling and field operation. |
| JEDEC-Standard Packaging | Available in PLCC-32 (32J), PDIP-32 (32P6), and TSOP-32 (32T); AT27C020-15TI specifically uses PLCC-32 for surface-mount industrial PCBs. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
|
Use Scenario: Non-volatile storage of ladder logic interpreter and I/O mapping tables in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary boot-time firmware ROM accessed during cold start and watchdog reset recovery. Use Value: 150 ns access ensures deterministic execution startup under 5 MHz CPU clock; OTP prevents accidental overwrite in unattended deployments. |
Use Scenario: Storing initialization code and interrupt vectors for 8051- or Z80-based instrumentation front-ends with no flash support. IC Role / Device Role / Timing Role: Static memory mapped at 0x0000–0x3FFFF; enabled via fixed address decode logic. Use Value: CMOS/TTL compatibility allows direct connection to legacy bus drivers; 100 µA standby current extends battery-backed runtime. |
| Motor Drive Parameter Tables | Medical Device Calibration Data |
|
Use Scenario: Permanent storage of torque/speed lookup tables and safety-critical fault response profiles in brushless DC motor controllers. IC Role / Device Role / Timing Role: Read-only configuration memory accessed on demand during commutation cycles. Use Value: Industrial temperature rating (–40°C to +85°C) guarantees operation inside sealed drive enclosures; OTP prevents field corruption during EMC events. |
Use Scenario: Holding factory-calibrated sensor offsets and gain coefficients in Class II medical analyzers requiring traceable firmware integrity. IC Role / Device Role / Timing Role: Secure, write-once memory accessed during power-on self-test (POST) prior to analog signal processing. Use Value: Integrated ID code enables audit-ready verification of correct part revision; 2,000V ESD protection safeguards against handling-induced bit errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C256B-15PI | 256K × 8 OTP EPROM, 150 ns access, same PLCC-32 package, but requires VPP = 21 V and lacks integrated ID code. | Higher VPP increases programming complexity; no auto-ID requires manual algorithm selection in programmers. | Choose only if legacy tooling mandates AMD-compatible voltage profiles and ID code is unnecessary. |
| MX27C256-15PC | 256K × 8 OTP EPROM, 150 ns access, PDIP-32 only (no PLCC), VPP = 12.5 V, no ID code, lower ESD rating (1,500 V). | Through-hole only limits use to prototyping or legacy through-hole boards; reduced ESD margin impacts handling yield. | Select only for cost-sensitive PDIP-based designs where surface-mount PLCC is not feasible. |
Compared with AM27C256B-15PI and MX27C256-15PC, AT27C020-15TI offers integrated product identification for foolproof programming, 2,000V ESD protection for higher manufacturing yield, and guaranteed PLCC-32 packaging-making it the preferred choice for new industrial SMT designs requiring production-ready OTP reliability.
Availability
AT27C020-15TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot ROM, and motor drive parameter table applications requiring stable component supply and long-term lifecycle support.
Supply support for AT27C020-15TI 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.
The AT27C020 belongs to Atmel's 27C-series OTP EPROM product line, engineered for high-reliability firmware storage in industrial, automotive, and telecom infrastructure where data integrity and long-term bit retention are critical.
FAQ
What is the maximum operating temperature range for the AT27C020-15TI?
The AT27C020-15TI is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the datasheet's "Ordering Information" table, where the "I" suffix denotes industrial grade, and thermal performance is confirmed across all AC/DC parameters including tACC, ICC, and ISB. The AT27C020-15TI maintains full functionality-including 150 ns read access and 100 µA standby current-within this range.
Does the AT27C020-15TI require a separate programming voltage during normal read operation?
No, the AT27C020-15TI requires only a single 5V ±10% supply (VCC) for normal read operation. VPP (12.0 V ±0.5 V) is needed exclusively during programming and must be disconnected or held at 5V during read mode. The datasheet explicitly states "VPP may be connected directly to VCC except during programming," confirming safe 5V-only operation for system reads.
How many address and data pins does the AT27C020-15TI have?
The AT27C020-15TI has 18 address pins (A0 through A17) and 8 data output pins (O0 through O7), matching its 256K × 8 organization. This is confirmed in the "Pin Configurations" section and block diagram, where A0–A17 are labeled as address inputs and O0–O7 as outputs. No multiplexing or bidirectional data lines are used-the device is strictly read-only with dedicated output drivers.
Is the AT27C020-15TI pin-compatible with other speed grades in the AT27C020 family?
Yes, all AT27C020 variants-including AT27C020-55TI, AT27C020-70TI, and AT27C020-15TI-share identical pinouts and package footprints (PLCC-32 for TI-suffixed parts). The only difference is AC timing: tACC is 55 ns, 70 ns, 90 ns, 120 ns, or 150 ns. Electrical interfaces, control pin functions (CE, OE, PGM), and DC characteristics remain fully compatible across speed grades.
What programming algorithm does the AT27C020-15TI use, and how is it verified?
The AT27C020-15TI uses Atmel's Rapid™ Programming Algorithm, which applies a 100 µs PGM pulse per byte, followed by automatic verification. If verification fails, up to 10 additional pulses are applied. Final validation reads all bytes post-programming and compares them to the original data. This process is detailed in the "Rapid Programming Algorithm" section (page 8) and requires VPP = 13.0 V ±0.25 V and VCC = 6.5 V ±0.25 V.
AT27C020-15TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT27C020-15TI FAQ
1.How can I place an order for AT27C020-15TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C020-15TI 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 AT27C020-15TI reliable?
The price and inventory of AT27C020-15TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C020-15TI is usually 5 days.
3.What payment methods are accepted for AT27C020-15TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C020-15TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C020-15TI?
AT27C020-15TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C020-15TI 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 AT27C020-15TI?
For technical support, including AT27C020-15TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C020-15TI requirements.
6.How does Aetrix verify that AT27C020-15TI is sourced from the original manufacturer or authorized distributors?
All AT27C020-15TI 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 AT27C020-15TI meets industry standards.
7.What is the process for return or replacement of AT27C020-15TI?
All AT27C020-15TI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C020-15TI, 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 AT27C020-15TI part is unused and in its original packaging.
Return procedure for AT27C020-15TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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