My Inquiry
My Account
Microchip Technology AT25640B-MAPDGV-E
- Part No.:
- AT25640B-MAPDGV-E
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT25640B-MAPDGV-E.pdf
- Description:
- IC EEPROM 64KBIT SPI 5MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,846
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25640B-MAPDGV-E from Microchip Technology is a 64 Kbit (8,192 × 8) SPI Serial EEPROM optimized for automotive-grade nonvolatile data storage. It operates across 1.7V–5.5V supply, supports AEC-Q100 Grade 3 (−40°C to +85°C), delivers up to 5 MHz clock rate at 5V, and features hardware/software write protection with 32-byte page writes.
For engineers reviewing the AT25640B-MAPDGV-E datasheet, AT25640B-MAPDGV-E pinout, AT25640B-MAPDGV-E application, or AT25640B-MAPDGV-E equivalent, this page provides verified electrical specs, pin-level design meaning, automotive temperature compliance, endurance/reliability metrics, and real-world use context for embedded control, diagnostics, and configuration storage in safety-critical systems.
Technical Context
The AT25640B-MAPDGV-E implements a standard SPI slave interface supporting Modes 0 and 3, with data latched on SCK rising edge and output on falling edge. Its internal architecture includes a STATUS register with nonvolatile BP1/BP0 bits enabling 1/4, 1/2, or full-array block write protection, and a WPEN bit controlling hardware write-protect functionality.
It integrates a high-voltage generation circuit for EEPROM programming, power-on reset (POR) logic ensuring safe initialization, and HOLD pin support for pausing serial transfers without resetting the sequence. The device uses an 8-bit instruction register and supports WREN/WRDI/RDSR/WRSR/READ/WRITE opcodes with MSb-first data framing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbits (8,192 × 8), organized as 8,192 addressable bytes |
| Supply Voltage Range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers |
| Max Clock Frequency | 5 MHz at VCC = 5.0V - supports high-speed read/write in bandwidth-constrained automotive buses |
| Page Write Size | 32 bytes - minimizes write latency per transaction and reduces host-side polling overhead |
| Write Endurance | 1,000,000 cycles - ensures long-term reliability in frequent configuration update scenarios (e.g., calibration logs) |
| Data Retention | 100 years at TA = 55°C - guarantees data integrity over full vehicle lifecycle without refresh |
| AEC-Q100 Grade | Grade 3 (−40°C to +85°C) - qualified for under-hood and cabin control module environments |
Pinout & Package
AT25640B-MAPDGV-E is supplied in an 8-lead SOIC package (3.9mm × 4.9mm body, 1.27mm pitch), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high→low before SCK activity; ties to MCU GPIO or dedicated SPI CS line |
| SO | Serial Data Output | Tri-state open-drain output; drives data on falling SCK edge; requires external pull-up for proper level integrity |
| WP | Write-Protect Input | Hardware lock: when low + WPEN=1, blocks STATUS register writes; configurable via STATUS register for flexible field updates |
| GND | Ground Reference | System ground return path; must be low-impedance and decoupled near VCC pin to suppress noise during write cycles |
| SI | Serial Data Input | CMOS input; latches command/address/data on rising SCK edge; tolerant of 1.7V–5.5V logic levels |
| SCK | Serial Clock Input | Asynchronous master clock; idle state must match SPI mode (Mode 0: low; Mode 3: high) for reliable frame sync |
| HOLD | Suspend Control | Pauses ongoing SPI transfer without resetting state; active-low, requires SCK low to assert/deassert; preserves internal address pointer |
| VCC | Power Supply | 1.7V–5.5V operation; requires ≥100nF ceramic decoupling capacitor placed within 5mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Automotive AEC-Q100 Qualification | Grade 3 certified for −40°C to +85°C operation - meets functional safety requirements for ECU firmware storage and diagnostic log retention |
| Hardware + Software Write Protection | WP pin + STATUS register BP1/BP0 bits allow layered protection: factory-set block locks plus runtime-configurable software disable |
| 32-Byte Page Write Mode | Reduces average write time to ≤5 ms per page - cuts host CPU wait time vs. byte-write-only EEPROMs and improves system responsiveness |
| Low Standby Current | ≤13.0 µA at 5.0V - extends battery life in always-on modules like telematics or gateway ECUs during sleep modes |
| SPI Mode 0 and 3 Compatibility | Interoperates with legacy and modern MCUs without protocol translation - eliminates need for glue logic or firmware adaptation |
| Green Packaging | Lead-free, halide-free, RoHS-compliant SOIC - satisfies global automotive environmental compliance mandates (ELV, IMDS) |
Applications
| Engine Control Unit (ECU) Calibration Storage | Advanced Driver Assistance Systems (ADAS) Configuration |
|---|---|
Use Scenario: Storing engine timing maps, fuel trim tables, and OBD-II fault codes that persist across ignition cycles and require field updates via dealership tools. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to ECU's SPI bus; accessed during boot and runtime for map lookups and logging. Use Value: 100-year data retention and 1M write cycles ensure calibration data survives 15+ years of vehicle service and repeated reprogramming events. |
Use Scenario: Holding camera alignment offsets, radar sensor fusion parameters, and lane-keeping assist thresholds that must survive power loss and thermal cycling. IC Role / Device Role / Timing Role: SPI-connected parameter store for ADAS domain controller; read at startup and updated only during calibration procedures. Use Value: AEC-Q100 Grade 3 qualification guarantees stable operation at +85°C ambient - critical for under-hood camera modules and radar housings. |
| Body Control Module (BCM) User Preference Memory | Infotainment System Firmware Patch Storage |
Use Scenario: Retaining seat position, mirror angle, climate presets, and lighting profiles across vehicle power-down events. IC Role / Device Role / Timing Role: Low-power SPI EEPROM used by BCM microcontroller for fast, deterministic read/write of small user datasets. Use Value: 1.7V minimum VCC allows operation during brown-out conditions; 32-byte page writes minimize bus occupancy during multi-parameter saves. |
Use Scenario: Storing delta patches applied to infotainment head unit firmware to reduce OTA update size and improve rollback safety. IC Role / Device Role / Timing Role: Secure, write-protected storage for signed patch metadata and version history - accessed only by trusted bootloader. Use Value: Hardware WP pin + STATUS register BP bits prevent accidental overwrite during concurrent system operations, enhancing update integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95640-DRMN6TP/K | 64 Kbit SPI EEPROM, 1.8V–5.5V, AEC-Q100 Grade 2 (−40°C to +105°C), 20 MHz max clock | Higher temperature grade and faster clock; no HOLD pin; different STATUS register layout | Preferred where extended temperature range or higher throughput is required, but requires firmware adaptation for HOLD and status handling |
| BR24G64FJ-3GE2 | 64 Kbit I²C EEPROM, 1.7V–5.5V, AEC-Q100 Grade 3, 1 MHz max clock, built-in error correction | I²C interface instead of SPI; lower speed; ECC support for enhanced data integrity | Choose when I²C bus resources are available and ECC is prioritized over speed; not pin-compatible or protocol-compatible with AT25640B-MAPDGV-E |
Compared with M95640-DRMN6TP/K and BR24G64FJ-3GE2, the AT25640B-MAPDGV-E offers balanced automotive qualification, SPI compatibility with HOLD functionality, and proven integration in cost-sensitive ECU designs - making it optimal for applications requiring deterministic timing, hardware suspend capability, and established supply chain validation.
Availability
AT25640B-MAPDGV-E is available at Aetrix Electronics and suitable for engine control units, ADAS calibration modules, body control systems, and infotainment firmware patch storage requiring stable component supply across automotive production lifecycles.
Supply support for AT25640B-MAPDGV-E 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
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and memory solutions, serving automotive, industrial, and communications markets with ISO/TS 16949-certified manufacturing.
The AT25640B-MAPDGV-E belongs to Microchip's AT25xxx-B automotive EEPROM family, designed specifically for robust, low-power, high-reliability nonvolatile storage in safety-critical electronic control modules.
FAQ
What is the operating temperature range for the AT25640B-MAPDGV-E?
The AT25640B-MAPDGV-E is qualified to AEC-Q100 Grade 3, with a specified operating temperature range of −40°C to +85°C. This rating applies to the full functional specification including read/write timing, voltage thresholds, and endurance - validated across the entire range per automotive qualification standards.
Does the AT25640B-MAPDGV-E support SPI Mode 3, and how does it differ from Mode 0?
Yes, the AT25640B-MAPDGV-E supports both SPI Mode 0 and Mode 3. In both modes, data is latched on the rising edge of SCK and output on the falling edge. The difference lies in the idle state of SCK: Mode 0 requires SCK to be low when CS is inactive, while Mode 3 requires SCK to be high. The AT25640B-MAPDGV-E detects and adapts to either idle polarity automatically.
How does the HOLD pin function during an active write cycle in the AT25640B-MAPDGV-E?
The HOLD pin has no effect on an ongoing internal write cycle in the AT25640B-MAPDGV-E. It only suspends serial communication - i.e., incoming commands and address/data transfers - while preserving the current internal state. Once HOLD is deasserted, the device resumes normal SPI operation, but the write cycle continues uninterrupted to completion in ≤5 ms.
What write protection mechanisms are implemented in the AT25640B-MAPDGV-E?
The AT25640B-MAPDGV-E implements dual-layer write protection: (1) hardware-based via the WP pin (active-low, enabled when WPEN=1), and (2) software-configurable via BP1/BP0 bits in the STATUS register to protect 1/4, 1/2, or the full memory array. Both mechanisms can be used simultaneously for defense-in-depth security in automotive firmware storage.
Is the AT25640B-MAPDGV-E pin-compatible with other members of the AT25xxx-B family?
Yes, the AT25640B-MAPDGV-E shares identical pinout, package dimensions, and electrical interface with AT25080B/AT25160B/AT25320B in the same SOIC/TSSOP/UDFN packages. This allows drop-in replacement across density variants without PCB redesign - provided software addresses the correct memory size and timing constraints.
AT25640B-MAPDGV-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 5 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT25640B-MAPDGV-E FAQ
1.How can I place an order for AT25640B-MAPDGV-E through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25640B-MAPDGV-E 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 AT25640B-MAPDGV-E reliable?
The price and inventory of AT25640B-MAPDGV-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25640B-MAPDGV-E is usually 5 days.
3.What payment methods are accepted for AT25640B-MAPDGV-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25640B-MAPDGV-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25640B-MAPDGV-E?
AT25640B-MAPDGV-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25640B-MAPDGV-E 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 AT25640B-MAPDGV-E?
For technical support, including AT25640B-MAPDGV-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25640B-MAPDGV-E requirements.
6.How does Aetrix verify that AT25640B-MAPDGV-E is sourced from the original manufacturer or authorized distributors?
All AT25640B-MAPDGV-E 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 AT25640B-MAPDGV-E meets industry standards.
7.What is the process for return or replacement of AT25640B-MAPDGV-E?
All AT25640B-MAPDGV-E units undergo pre-shipment inspection (PSI). If there is an issue with AT25640B-MAPDGV-E, 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 AT25640B-MAPDGV-E part is unused and in its original packaging.
Return procedure for AT25640B-MAPDGV-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25640B-MAPDGV-E 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…
