IDT74FST163384 Datasheet, PDF (1/6 Pages) Integrated Device Technology – 20-BIT BUS SWITCH

20-BIT BUS SWITCH
IDT74FST163384
IDT74FST1632384
ADVANCE INFORMATION
Integrated Device Technology, Inc.
FEATURES:
• Bus switches provide zero delay paths
• Extended commercial range of –40°C to +85°C
• Low switch on-resistance:
FST163xxx – 5Ω
FST1632xxx — 28Ω
• TTL-compatible input and output levels
• ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
• Available in SSOP, TSSOP and TVSOP
DESCRIPTION:
The FST163384/1632384 belong to IDT's family of Bus
switches. Bus switch devices perform the function of connect-
ing or isolating two ports without providing any inherent
current sink or source capability. Thus they generate little or
no noise of their own while providing a low resistance path for
an external driver. These devices connect input and output
ports through an n-channel FET. When the gate-to-source
junction of this FET is adequately forward-biased the device
conducts and the resistance between input and output ports
is small. Without adequate bias on the gate-to-source junction
of the FET, the FET is turned off, therefore with no VCC
applied, the device has hot insertion capability.
The low on-resistance and simplicity of the connection
between input and output ports reduces the delay in this path
to close to zero.
The FST1632xxx integrates terminating resistors in the
device, thus eliminating the need for external 25Ω series
resistors.
The FST163384 and FST1632384 are 20-bit TTL-compat-
ible bus switches. The BEx pins provide enable control.
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A10
B10
A4
B4
A14
B14
A5
B5
A15
B15
A9
BEA
BEB
B9
A19
BEC
BED
PIN DESCRIPTION
Pin Names
I/O
A0-19
I/O
B0-19
I/O
BEA, BEB,
I
BEC, BED,
Bus A
Description
Bus B
Bus Switch Enable (Active LOW)
3473 tbl 01
B19
3473 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
©1997 Integrated Device Technology, Inc.
1
FEBRUARY 1997
DSC-3473/4