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Microchip Technology AT27C010-45JU
- Part No.:
- AT27C010-45JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27C010-45JU.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,043
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Product details
Overview
AT27C010-45JU from Atmel is a 128K × 8-bit, one-time programmable EPROM with 45ns read access time, 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It features CMOS/TTL-compatible I/O, rapid programming (100µs/byte), and dual-line control (CE/OE) for bus contention prevention in microprocessor systems.
For engineers reviewing the AT27C010-45JU datasheet, AT27C010-45JU pinout, AT27C010-45JU application, or AT27C010-45JU equivalent, this device serves as a legacy firmware storage solution requiring verified OTP reliability, low active/standby current, JEDEC-standard PLCC packaging, and VPP-assisted programming at 12V.
Technical Context
The AT27C010-45JU implements a parallel-addressed OTP EPROM architecture with 17 address lines (A0–A16), 8 bidirectional data outputs (O0–O7), and dedicated control pins (CE, OE, PGM, VPP). Its read timing is governed by tACC ≤ 45ns and tOE ≤ 20ns under 5V operation with 1.5V reference level.
Programming requires precise voltage sequencing: VCC (6.5V) and VPP (12.0V ±0.5V) must be applied simultaneously, with PGM strobe pulses of 95–105µs width. The integrated product identification code uses A9 high-voltage sensing (11.5–12.5V) and A0 toggling to return manufacturer (0x1E) and device (0x05) bytes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128K × 8-bit (1,048,576 bits), fixed OTP organization - no erase capability, suitable for immutable firmware images. |
| Read access time | 45ns max - enables direct interface with 22 MHz microprocessors without wait states. |
| Supply voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; VPP = 12.0V ±0.5V required only during programming. |
| Active current | 25mA max at 5MHz - defines power budget for sustained read bursts in embedded controllers. |
| Standby current | 100µA max - supports low-power hold modes in battery-backed or intermittently powered systems. |
| Operating temperature | –40°C to +85°C - qualified for industrial-grade environments including factory automation and instrumentation. |
| ESD protection | 2000V HBM - ensures robustness during handling and PCB assembly without special ESD controls. |
Pinout & Package
AT27C010-45JU is packaged in a 32-lead plastic J-leaded chip carrier (PLCC), JEDEC MS-016 Variation AE compliant, with 12.32mm × 14.86mm body and 1.27mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address inputs | 17-bit address bus - selects one of 131,072 bytes; A16 is MSB for full 128K decoding. |
| O0–O7 | Data outputs | 8-bit bidirectional data bus - driven during read; high-impedance when CE or OE inactive. |
| CE | Chip enable | Active-low global enable - disables outputs and reduces ICC to standby level when high. |
| OE | Output enable | Active-low output gate - allows shared bus operation without disabling chip; overrides CE timing for output float control. |
| PGM | Program strobe | Active-low programming trigger - initiates 100µs pulse-driven byte programming when VPP = 12V. |
| VPP | Programming voltage | 12.0V ±0.5V input - enables Fowler-Nordheim tunneling; must be sequenced with VCC and decoupled with 0.1µF ceramic cap. |
| NC | No connect | Pin 32 in PLCC package - electrically isolated; no internal connection or function. |
| GND / VCC | Power terminals | Pins 16 (GND) and 31 (VCC) - require local 0.1µF ceramic decoupling; bulk 4.7µF electrolytic recommended for multi-device arrays. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid programming algorithm | 100µs/byte typical - reduces firmware burn time by >90% vs. conventional EPROMs; includes auto-verify/reprogram loop up to 10 pulses per byte. |
| Integrated product ID code | Manufacturer (0x1E) and device (0x05) bytes readable via A9=12V and A0 toggle - enables automated programmer recognition and algorithm selection. |
| Two-line control (CE/OE) | Independent chip and output gating - eliminates bus contention in multi-peripheral systems without external logic or wait-state insertion. |
| Green (Pb/halide-free) packaging | Matte tin lead finish on 32J PLCC - meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 2a marking requirements. |
| High-reliability process | 200mA latchup immunity and 2000V ESD - ensures field robustness in noisy industrial environments with minimal board-level protection. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Controller Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O mapping tables in programmable logic controllers deployed in factory-floor environments with wide thermal cycling and electrical noise. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 45ns read access to initialization code for real-time control execution. Use Value: Eliminates mass-storage latency; withstands 85°C ambient and 2000V ESD events without corruption or reprogramming. | Use Scenario: Holding immutable BIOS and peripheral initialization routines in 1990s-era industrial computers using Intel 80386/80486 processors. IC Role / Device Role / Timing Role: Parallel-mapped ROM accessed via ISA bus address/data lines with CE/OE-controlled bus arbitration. Use Value: Guarantees sub-50ns instruction fetch timing and zero wait-state operation at 20MHz CPU clock. |
| Military Avionics Configuration Memory | Medical Device Calibration Data Archive |
Use Scenario: Retaining flight-critical configuration parameters and sensor calibration coefficients in airborne mission computers where rewrite cycles are prohibited post-deployment. IC Role / Device Role / Timing Role: One-time programmable storage with permanent data retention; accessed during power-on self-test (POST) sequence. Use Value: Provides tamper-resistant, radiation-tolerant data integrity over 10+ year service life without battery backup. | Use Scenario: Archiving factory-calibrated ADC offset/gain coefficients and safety-critical lookup tables in Class II medical analyzers requiring regulatory traceability. IC Role / Device Role / Timing Role: Read-only memory mapped into microcontroller address space for deterministic calibration retrieval during diagnostic startup. Use Value: Ensures FDA 21 CFR Part 11 compliance via unalterable, version-locked calibration data with manufacturer/device ID verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-45JU | 256K × 8-bit capacity; identical 45ns timing, PLCC-32 package, and programming algorithm. | Supports larger firmware images; requires wider address bus (A0–A17) and updated memory map. | Select when firmware exceeds 128KB but system board layout and voltage rails remain unchanged. |
| MX27C1001PC-45 | 128K × 8-bit OTP EPROM; 45ns access, PDIP-32 package, 5V/12V dual-supply programming. | Uses through-hole PDIP instead of surface-mount PLCC; lacks integrated product ID code and green packaging. | Choose for legacy through-hole designs or cost-sensitive replacements where PLCC footprint is not available. |
Compared with AT27C010-45JU, AT27C020-45JU doubles storage without timing or interface changes, while MX27C1001PC-45 offers identical density in PDIP but sacrifices ID verification and RoHS compliance - both require validation of VPP sequencing and board-level decoupling.
Availability
AT27C010-45JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded controller boot ROM, military avionics configuration memory, and medical device calibration data archive requiring stable component supply across extended production lifecycles.
Supply support for AT27C010-45JU 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, designed high-reliability non-volatile memory and microcontrollers for industrial, automotive, and communications applications before its 2016 acquisition.
The AT27C010 belongs to Atmel's OTP EPROM product line, engineered for deterministic, tamper-proof firmware storage in systems where flash endurance or reprogrammability is unnecessary and long-term data retention is critical.
FAQ
What is the maximum operating temperature range for the AT27C010-45JU?
The AT27C010-45JU is rated for industrial temperature operation from –40°C to +85°C. This range is validated per JEDEC JESD22-A104 and applies to all DC and AC specifications including read access time (45ns), standby current (100µA max), and programming voltage tolerance (12.0V ±0.5V). Operation outside this range may cause timing violations or data retention failure.
Does the AT27C010-45JU support in-system programming?
No, the AT27C010-45JU does not support in-system programming. It requires external EPROM programmers that apply 12.0V to VPP and 6.5V to VCC during programming, with precise 100µs PGM pulse timing. The device lacks serial interfaces, command protocols, or internal charge pumps needed for ISP - programming must occur in a socketed or adapter-based fixture prior to system integration.
What decoupling capacitors are required for stable operation of the AT27C010-45JU?
The AT27C010-45JU requires a 0.1µF high-frequency ceramic capacitor between VCC and GND, placed as close as possible to pins 31 and 16. For systems with multiple EPROMs, a 4.7µF bulk electrolytic capacitor must also be added near the power entry point. These values are specified in the "System considerations" section to suppress transients during CE switching and stabilize VPP/VCC sequencing during programming.
How is the product identification code read from the AT27C010-45JU?
The AT27C010-45JU product identification code is read by setting A9 to 11.5–12.5V (VID), holding A1–A16 low, and toggling A0: low returns the manufacturer ID (0x1E), high returns the device ID (0x05). This mode requires VCC = 6.5V ±0.25V and VPP = 13.0V ±0.25V, with outputs O0–O7 driving the 8-bit code directly - no additional protocol or timing sequence is needed beyond voltage setup.
Is the AT27C010-45JU RoHS-compliant?
Yes, the AT27C010-45JU is RoHS-compliant with a matte tin lead finish and Pb/halide-free construction, meeting EU Directive 2011/65/EU and JEDEC J-STD-609A Class 2a. The "JU" suffix explicitly denotes the green packaging option; this compliance is documented in Atmel's ordering information table and verified via material declarations from Microchip Technology.
AT27C010-45JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27C010-45JU FAQ
1.How can I place an order for AT27C010-45JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C010-45JU 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 AT27C010-45JU reliable?
The price and inventory of AT27C010-45JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C010-45JU is usually 5 days.
3.What payment methods are accepted for AT27C010-45JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C010-45JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C010-45JU?
AT27C010-45JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C010-45JU 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 AT27C010-45JU?
For technical support, including AT27C010-45JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C010-45JU requirements.
6.How does Aetrix verify that AT27C010-45JU is sourced from the original manufacturer or authorized distributors?
All AT27C010-45JU 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 AT27C010-45JU meets industry standards.
7.What is the process for return or replacement of AT27C010-45JU?
All AT27C010-45JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27C010-45JU, 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 AT27C010-45JU part is unused and in its original packaging.
Return procedure for AT27C010-45JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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