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AT29LV040A-20TC

Name: AT29LV040A-20TC
Rating: 4.7 (12 reviews)

IC FLASH 4MBIT PARALLEL 32TSOP

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Mfr。パート #AT29LV040A-20TC
パッケージ 32-TFSOP
データシート
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仕様

Package	Tray
ProductStatus	Obsolete
MemoryType	Non-Volatile
MemoryFormat	FLASH
Technology	FLASH
MemorySize	4Mb (512K x 8)
MemoryInterface	Parallel
WriteCycleTime-WordPage	20ms
AccessTime	200 ns
Voltage-Supply	3V ~ 3.6V
OperatingTemperature	0°C ~ 70°C (TC)
MountingType	Surface Mount
Package/Case	32-TFSOP (0.724, 18.40mm Width)

概要

Description

AT29LV040A-20TC is a 4-megabit NOR flash memory from Atmel (Microchip). Quick intro:
- Type: NOR flash for non-volatile code storage
- Capacity: 4 Mb (512 KB) organized as 512K x 8
- Interface/Bus: Parallel, 8-bit data bus
- Speed: 20 ns access time (the “-20”)
- Voltage: Low-voltage operation, typically 2.7–3.6 V
- Addressing: A0–A18 addressing
- Operations: Async reads; program/erase via standard unlock command sequences (byte/word programming; sector/block/chip erase)
- Package/Temp: 32-pin package, Commercial temperature range (0–70 °C)
- Applications: Firmware storage, boot ROM, code in embedded systems
Note: Uses typical NOR-flash command set; ensure proper erase before reprogramming and observe wear limits.

Features

Key features of AT29LV040A-20TC:
- 4 Mbit flash memory (512K x 8)
- 5V single-supply operation
- 20 ns maximum access time (as indicated by -20)
- 8-bit data bus (x8) with random read
- In-system programmable via standard command set (byte/word programming)
- Sector/Block erase with hardware/ software protection (BPx, WP#)
- Auto-program/auto-erase with program-verify and Ready/Busy status
- Endurance typically ~100,000 P/E cycles; data retention ≥20 years
- Low power modes: standby and power-down
- Commercial operating temperature (0°C–70°C)
- Package: 32-pin plastic package (TC variant)

Package

8‑pin SOIC (Small Outline) package. The “TC” suffix indicates Tape & Reel packaging for the AT29LV040A-20TC.

Pinout

- Pin count: 28 pins (TSOP-28/SOIC-28)
- Function: 4-Mbit low-voltage parallel flash memory (AT29LV040A), 8-bit data bus, non-volatile storage for firmware/code with standard flash operations (read, program, erase) using CE, OE, WE and address lines. The -20 indicates 20 ns access time.

Manufacturer

- Manufacturer: Atmel Corporation (now part of Microchip Technology).
- What kind of company: A semiconductor company that designs and manufactures memory ICs and microcontrollers (embedded processors).

Application

- Embedded systems firmware storage and boot code for MCUs/DSPs
- In-system programmable memory for consumer electronics (set-top boxes, printers, digital cameras)
- Automotive ECUs and industrial controllers for firmware and data storage
- Networking/telecom equipment for firmware/configuration storage
- Data logging and software update memory in embedded products

Equivalent

Equivalents: AM29LV040 (AMD), ST M29W040 (ST), Macronix MX29LV040, Winbond W29GL040, SST39SF040. All are 4-Mbit, 8-bit parallel flash with similar voltage ranges (5V/3.3V) and speed grade (~-20). Check exact voltage, package, and cross-reference in datasheets.