My Inquiry
My Account
Microchip Technology AT27C2048-70PI
- Part No.:
- AT27C2048-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C2048-70PI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,964
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT27C2048-70PI from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM with 55 ns read access time, 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It features dual-line control (CE/OE), CMOS/TTL-compatible I/O, and rapid 50 µs/word programming. Used in firmware storage for 16/32-bit microprocessor systems where non-volatile, pin-compatible EPROM upgrade is required.
For engineers reviewing the AT27C2048-70PI datasheet, AT27C2048-70PI pinout, AT27C2048-70PI application, or AT27C2048-70PI equivalent, key selection criteria include read timing (tACC = 70 ns), standby current (≤100 µA), VPP programming voltage (12.0 V), JEDEC-standard 40-lead PDIP package, and OTP reliability for embedded boot code storage.
Technical Context
The AT27C2048-70PI operates in five distinct modes-Read, Output Disable, Standby, Rapid Program, and Product Identification-controlled by CE, OE, and PGM signals with precise voltage thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Its 128K × 16 organization enables byte-wide or word-wide data access without external multiplexing.
It integrates a Rapid™ Programming Algorithm requiring 12.0 V on A9 for identification and 13.0 V on VPP during programming, with strict sequencing (VCC applied before VPP). The device uses high-reliability CMOS technology with 2,000 V ESD protection and 200 mA latchup immunity, supporting both commercial and industrial temperature grades.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16); supports full 16-bit parallel bus interface without glue logic. |
| Read Access Time | 70 ns max (tACC); eliminates WAIT states in 5 MHz microprocessor systems. |
| Supply Voltage | 5V ±10%; compatible with standard TTL/CMOS logic rails and legacy 5V system designs. |
| Standby Current | 100 µA max (ISB1); enables low-power hold mode during processor idle cycles. |
| Active Current | 35 mA max at 5 MHz; ensures stable operation under sustained read load without thermal derating. |
| VPP Programming Voltage | 12.0 V ±0.5 V on A9 for ID read; 13.0 V ±0.25 V on VPP for programming; requires external high-voltage source. |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade embedded control and instrumentation applications. |
Pinout & Package
AT27C2048-70PI is supplied in a 40-lead, 0.600" wide plastic dual inline package (PDIP), per JEDEC MS-011 AC. Both GND pins (pins 12 and 39) must be connected for proper noise immunity and current return path integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word decoding; A0–A16 directly map to memory locations without address latching. |
| O0–O15 | Data Outputs | 16-bit bidirectional output bus; outputs driven only when CE = VIL and OE = VIL; high-impedance otherwise. |
| CE | Chip Enable | Primary chip-select; device active only when CE = VIL; controls power state transition between active and standby. |
| OE | Output Enable | Output gating signal; allows bus sharing without contention; output floats within 20 ns of OE high. |
| PGM | Program Strobe | Active-low pulse input (50 µs width) initiating write cycle; requires precise VPP and VCC sequencing. |
| VPP | Programming Voltage | 13.0 V input during programming; must be applied after VCC and removed before VCC to prevent latchup. |
| VCC | Power Supply | 5V ±10% main supply; powers core logic and I/O buffers; decoupling capacitor (0.1 µF ceramic) required at pin. |
| GND | Ground | Two dedicated ground pins (12 and 39); both must be connected to minimize ground bounce and ensure ESD robustness. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time reduces firmware update cycle duration and improves production throughput. |
| Integrated Product Identification Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9/VH and A0 toggle; enables auto-detection in universal programmers. |
| Two-Line Control Architecture | Independent CE and OE inputs eliminate bus contention in multi-device systems and support flexible memory mapping. |
| High-Reliability CMOS Process | 2,000 V HBM ESD rating and 200 mA latchup immunity ensure robustness in manufacturing handling and field operation. |
| JEDEC-Standard Packaging | 40P6 PDIP footprint enables drop-in replacement of legacy AT27C516 and AT27C1024 EPROMs without PCB redesign. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Boot ROM |
|---|---|
|
Use Scenario: Storing fixed boot code and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile boot ROM providing deterministic startup sequence with guaranteed 70 ns read latency. Use Value: Industrial temperature rating (–40°C to +85°C) and 100 µA standby current enable reliable long-term operation without refresh or backup power. |
Use Scenario: Replacing obsolete 1M-bit EPROMs in aging medical instrument control boards requiring firmware immutability. IC Role / Device Role / Timing Role: Pin-compatible OTP upgrade path delivering 2× density without layout changes or timing recalculations. Use Value: Direct upgrade from AT27C1024 preserves existing CE/OE timing margins while doubling available code space. |
| Automotive Diagnostic Tool Memory | Test Equipment Calibration Data |
|
Use Scenario: Holding diagnostic protocol stacks and vehicle-specific calibration tables in handheld OBD-II scanners. IC Role / Device Role / Timing Role: Read-only firmware repository accessed via 16-bit microcontroller bus during tool initialization. Use Value: 5V ±10% supply tolerance accommodates automotive battery voltage fluctuations without level-shifting circuitry. |
Use Scenario: Storing factory-calibrated coefficients and sensor compensation data in benchtop multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Immutable reference data store accessed once at power-up to initialize measurement algorithms. Use Value: Rapid 50 µs/word programming enables efficient post-calibration data loading during final test, reducing line cycle time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C1024-70PI | 1-Mbit (64K × 16); same 70 ns speed, 40P6 PDIP, and industrial temp range; lacks A16 address line and 2-Mbit capacity. | Applicable only where firmware size ≤ 64K words; insufficient for larger boot images or feature-rich firmware. | Select when legacy design uses AT27C1024 and no firmware expansion is planned; lower cost but half capacity. |
| AM27C2048-70DC | Same 2-Mbit density and 70 ns speed, but offered in 44-lead PLCC (44J) instead of PDIP; different pinout and footprint. | Requires PCB redesign due to incompatible package; not pin-compatible despite identical functionality. | Choose only if PLCC mounting is preferred for board density or rework requirements; not a drop-in replacement. |
Compared with AT27C1024-70PI, the AT27C2048-70PI doubles addressable memory while retaining identical timing, voltage, and temperature specs-enabling firmware scalability without system-level timing impact. Versus AM27C2048-70DC, it offers direct PDIP compatibility for legacy through-hole assembly, avoiding costly layout revision.
Availability
AT27C2048-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded boot ROM upgrades, and automotive diagnostic tool memory requiring stable component supply across extended product lifecycles.
Supply support for AT27C2048-70PI 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 manufacturer specializing in microcontrollers, non-volatile memory, and programmable logic devices before its acquisition by Microchip Technology in 2016.
The AT27C2048 belongs to Atmel's OTP EPROM product line, designed specifically for firmware and boot code storage in industrial, automotive, and instrumentation systems requiring high reliability, long-term data retention, and JEDEC-standard packaging.
FAQ
What is the maximum read access time specified for the AT27C2048-70PI?
The AT27C2048-70PI has a maximum read access time (tACC) of 70 ns under industrial temperature conditions (–40°C to +85°C) and 5V ±10% supply. This value is guaranteed across the full operating range and enables direct interfacing with 5 MHz microprocessors without wait-state insertion. The "-70" suffix in the part number explicitly denotes this 70 ns speed grade.
Does the AT27C2048-70PI require a high-voltage supply for normal read operation?
No, the AT27C2048-70PI operates in read mode using only a single 5V ±10% supply (VCC). The VPP pin is used exclusively during programming and product identification-requiring 12.0 V for ID reads and 13.0 V for programming-and must be held at VCC (5V) during normal read operation. Applying high voltage to VPP during read will damage the device.
Can the AT27C2048-70PI be used as a direct replacement for the AT27C1024 in an existing design?
Yes, the AT27C2048-70PI is a direct upgrade from the AT27C1024 with identical 40-lead PDIP packaging, pinout, timing, and voltage specifications. Its additional A16 address line extends memory to 128K × 16, while maintaining full backward compatibility-existing CE/OE timing and control logic remain valid without modification.
What is the purpose of the PGM pin on the AT27C2048-70PI?
The PGM pin on the AT27C2048-70PI is the active-low program strobe input that initiates the Rapid™ programming algorithm. A 50 µs pulse applied to PGM-while VPP = 13.0 V and VCC = 6.5 V-triggers word programming. It is not used during read or standby modes and must remain unconnected or held high (VIH) in those states to prevent unintended writes.
How is the Integrated Product Identification Code accessed on the AT27C2048-70PI?
The Integrated Product Identification Code of the AT27C2048-70PI is accessed by setting A9 to 12.0 V (VH) while holding A1–A16 low (VIL), then toggling A0 between VIL (to read Manufacturer ID: 001Eh) and VIH (to read Device Code: 00F7h). This mode requires VPP = VCC and CE/OE = VIL, and is supported by industry-standard EPROM programmers.
AT27C2048-70PI 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:
- 2Mbit
- Memory Organization:
- 128K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 70 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
AT27C2048-70PI FAQ
1.How can I place an order for AT27C2048-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-70PI 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 AT27C2048-70PI reliable?
The price and inventory of AT27C2048-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-70PI is usually 5 days.
3.What payment methods are accepted for AT27C2048-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-70PI?
AT27C2048-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-70PI 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 AT27C2048-70PI?
For technical support, including AT27C2048-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-70PI requirements.
6.How does Aetrix verify that AT27C2048-70PI is sourced from the original manufacturer or authorized distributors?
All AT27C2048-70PI 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 AT27C2048-70PI meets industry standards.
7.What is the process for return or replacement of AT27C2048-70PI?
All AT27C2048-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-70PI, 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 AT27C2048-70PI part is unused and in its original packaging.
Return procedure for AT27C2048-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C2048-70PI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
