參數(shù)資料
型號: FST3384A
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代理商: FST3384A
FST3384A
10-Bit Low Power Extended Input Voltage Bus Switch
General Description
The FST3384A provides 10 bits of high-speed CMOS
TTL-compatible bus switches. The low on resistance of the
switch allows inputs to be connected to outputs without add-
ing propagation delay or generating additional ground
bounce noise. The device is organized as two 5-bit switches
with separate bus enable (BE ) signals. When BE is low, the
switch is on and port A is connected to port B. When BE is
high, the switch is open and a high-impedance state exists
between the two ports.
The FST3384A 10-bit bus switch is pin-for-pin and function
compatible with the FST3384 device. It has the added fea-
ture of allowing extended negative input voltages on the I/O
pins. The FST3384A bus switch, unlike most bus switches
on the market, will not falsely turn on when BE is high and
negative undershoot voltages are encountered on the I/O
pins. Thus it is “undershoot hardened” (see related applica-
tion note) tolerating undershoots up to 1.5V.
Typical applications include IDE bus connector interfaces,
PCI card interfaces, backplane card interfaces, and other
noisy environments where switches are needed.
Features
n
Extended input voltage design tolerates input
undershoots up to 1.5V
n
10
switch connection between two ports
n
Ultra low power with 2 μA typical I
CC
n
Zero ground bounce in flow-through mode
n
Control inputs compatible with TTL level
n
Available in SOIC, QSOP and TSSOP
Ordering Code:
Order Number
FST3384AQSC
FST3384AMTC
Package Number
MQA24
MTC24
Package Description
24-Lead (0.150" Wide) Shrink Small Outline Package, QSOP
24-Lead Thin Small Outline Package, TSSOP
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Connection Diagram
DS012481-1
Pin Assignment
SOIC, QSOP and TSSOP
DS012481-2
February 1998
F
1998 Fairchild Semiconductor Corporation
DS012481
www.fairchildsemi.com
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