SN74CBTLV3245A
LOW-VOLTAGE OCTAL FET BUS SWITCH
SCDS034H – JULY 1997 – REVISED NOVEMBER 1999
DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
Standard ’245-Type Pinout
5-Ω Switch Connection Between Two Ports
Isolation Under Power-Off Conditions
V
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
NC
A1
A2
A3
A4
A5
A6
A7
A8
CC
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
OE
B1
B2
B3
B4
B5
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Package Options Include Shrink
Small-Outline (DBQ), Thin Very
Small-Outline (DGV), Small-Outline (DW),
and Thin Shrink Small-Outline (PW)
Packages
13 B6
12 B7
11
B8
GND
NC – No internal connection
description
The SN74CBTLV3245A provides eight bits of high-speed bus switching in a standard ’245 device pinout. The
low on-state resistance of the switch allows connections to be made with minimal propagation delay.
Thedeviceisorganizedasone8-bitswitch. Whenoutputenable(OE)islow, the8-bitbusswitchisonandA port
is connected to B port. When OE is high, the switch is open and the high-impedance state exists between the
two ports.
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN74CBTLV3245A is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUT
FUNCTION
OE
L
A port = B port
Disconnect
H
logic diagram (positive logic)
2
18
11
A1
B1
B8
SW
SW
9
A8
19
OE
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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