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SST39VF400A-70-4I-EKE

Name: SST39VF400A-70-4I-EKE
Rating: 4.7 (12 reviews)

IC FLASH 4MBIT PARALLEL 48TSOP

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Mfr。パート #SST39VF400A-70-4I-EKE
パッケージ 48-TFSOP (0.724, 18.40mm Width)
データシート SST39VF400A-70-4I-EKE DataSheet
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仕様

Supplier	Microchip Technology
Package	Tray
Series	SST39 MPF™
ProductStatus	Active
MemoryType	Non-Volatile
MemoryFormat	FLASH
Technology	FLASH
MemorySize	4Mb (256K x 16)
MemoryInterface	Parallel
WriteCycleTime-WordPage	20µs
AccessTime	70 ns
Voltage-Supply	2.7V ~ 3.6V
OperatingTemperature	-40°C ~ 85°C (TA)
MountingType	Surface Mount
Package/Case	48-TFSOP (0.724, 18.40mm Width)

概要

Description

The SST39VF400A-70-4I-EKE is a 4-Mbit NOR flash memory from SST (firmware/code storage for embedded systems). It uses a parallel 8-bit data bus and a 19‑bit address space (512K x 8). Key specs commonly cited: 70 ns read access time, single-supply operation (typ. 5 V; some variants support 3.3 V), and standard NOR flash command set for reads, in-system programming, and sector/block erases via unlock sequences. The suffixes denote packaging/temperature options: -70 = 70 ns speed, -4I typically a specific package/pinout, and -EKE indicating an extended temperature variant for harsher environments. It’s offered in a 32-pin package and is suitable for firmware storage, boot code, and other non-volatile memory needs in embedded controllers. Typical endurance is on the order of 10^4–10^5 program/erase cycles with long data retention (years). For exact pinout, electrical characteristics, timing diagrams, and command sequences, refer to the official SST39VF400A datasheet.

Features

Here are the typical features of SST39VF400A-70-4I-EKE (4Mbit parallel flash):
- 4-Mbit NOR flash memory (512K x 8 organization)
- 70 ns random access time
- 8-bit wide parallel data bus (x8)
- Page programming and sector/block erase (built-in erase algorithms)
- Ready/Busy status output (R/B#) for operation timing
- 5V operation (Vcc) with standard CMOS I/O
- Industrial temperature range (-40°C to +85°C)
- Low-power standby/power-down modes
- High data retention (≈20 years) and erase/program endurance (typical ~10^4–10^5 cycles per sector)
- 32-pin package (e.g., SOP/TSOP variants) as indicated by the -EKE designation
- Complies with standard parallel flash command set for Read/Program/Erase
Note: exact sector sizes, page size, and voltage tolerance can vary by lot; refer to the specific datasheet revision for precise values.

Package

It uses a 32-pin SOP (SOIC) package; industrial temperature grade (I).

Pinout

- Pin count: 32 pins (32‑pin package)
- Function: SST39VF400A is a 4‑Mbit, parallel (8‑bit data bus) Flash memory. It provides asynchronous random access read/write with standard control signals: /CS (chip select), /WE (write enable), /OE (output enable); address lines A0–A18; data lines DQ0–DQ7; power and ground pins (Vcc, GND). Typical organization is 512K × 8 with 70 ns access time (as indicated by the -70).

Manufacturer

- Manufacturer: Silicon Storage Technology, Inc. (SST)
- What kind of company: A semiconductor company that designs and markets non-volatile flash memory (NOR/NAND) devices; it is a fabless memory company that outsources fabrication to foundries.

Application

- Embedded systems: firmware storage and boot code for microcontrollers, DSPs, and SoCs
- Consumer electronics: firmware/storage for digital cameras, set‑top boxes, MP3 players, game consoles
- Networking/peripherals: flash for routers, modems, printers and similar devices
- Industrial/instrumentation: compact non-volatile memory for controllers and automation gear

Equivalent

Equivalent parts (4Mbit parallel NOR Flash, 70ns, 5V) from other vendors include:
- Macronix MX29F400AB/BB
- Winbond W29C040
- ST M29W040
- Atmel AT29C040 and AT49F040
Note: cross-references depend on voltage, package, and exact timing. Verify packaging and AC specs to ensure true drop-in compatibility.