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8 Mbit Firmware Hub
A Microchip Technology Company
SST49LF008A
Data Sheet
Product Description
The SST49LF008A flash memory devices are designed to be read-compatible with the Intel? 82802
Firmware Hub (FWH) device for PC-BIOS application. These devices provide protection for the storage
and update of code and data in addition to adding system design flexibility through five general pur-
pose inputs. Two interface modes are supported by the SST49LF008A: Firmware Hub (FWH) Interface
mode for in-system programming and Parallel Programming (PP) mode for fast factory programming of
PC-BIOS applications.
The SST49LF008A flash memory devices are manufactured with SST’s proprietary, high performance
SuperFlash technology. The split-gate cell design and thick-oxide tunneling injector attain better reli-
ability and manufacturability compared with alternate approaches. The SST49LF008A devices signifi-
cantly improve performance and reliability, while lowering power consumption.
The SST49LF008A devices write (Program or Erase) with a single 3.0-3.6V power supply. They use
less energy during Erase and Program than alternative flash memory technologies. The total energy
consumed is a function of the applied voltage, current and time of application. Since for any given volt-
age range, the SuperFlash technology uses less current to program and has a shorter Erase time, the
total energy consumed during any Erase or Program operation is less than alternative flash memory
technologies. The SST49LF008A products provide a maximum Byte-Program time of 20 μsec. The
entire memory can be erased and programmed byte-by-byte typically in 15 seconds when using status
detection features such as Toggle Bit or Data# Polling to indicate the completion of Program operation.
The SuperFlash technology provides fixed Erase and Program times independent of the number of
Erase/Program cycles performed. Therefore the system software or hardware does not have to be cal-
ibrated or correlated to the cumulated number of Erase/Program cycles as is necessary with alterna-
tive flash memory technologies, whose Erase and Program time increase with accumulated Erase/
Program cycles.
To protect against inadvertent write, the SST49LF008A devices employ hardware and software data
(SDP) protection schemes. It is offered with typical endurance of 100,000 cycles. Data retention is
rated at greater than 100 years.
To meet high density, surface mount requirements, the SST49LF008A devices are offered in a 32-lead
TSOP package. In addition, the SST49LF008A is offered in 32-lead PLCC and 40-lead TSOP pack-
ages. See Figures 2, 3, and 4 for pin assignments and Table 1 for pin descriptions.
?2011 Silicon Storage Technology, Inc.
2
DS25085A
10/11
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相关代理商/技术参数
SST49LF008A-33-4C-NH 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:2 Mbit / 3 Mbit / 4 Mbit / 8 Mbit Firmware Hub
SST49LF008A-33-4C-NHE 功能描述:闪存 8M (1Mx8) 33MHz Commercial Temp RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
SST49LF008A-33-4C-NHE_ 制造商:Microchip Technology Inc 功能描述:
SST49LF008A-33-4C-NHE-T 功能描述:闪存 8M (1Mx8) 33MHz 3.0-3.6V Commercial RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
SST49LF008A-33-4C-NHE-T-CUT TAPE 制造商:Microchip 功能描述:SST49LF Series 8 Mbit 1024 K x 8 3.3 V Firmware Hub - PLCC-32
SST49LF008A-33-4C-WH 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:2 Mbit / 3 Mbit / 4 Mbit / 8 Mbit Firmware Hub
SST49LF008A-33-4C-WHE 功能描述:闪存 8 MBIT FIRMWARE HUB RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
SST49LF008A-33-4C-WHE_ 制造商:Microchip Technology Inc 功能描述: