8-Bit Bus Switch
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74FST3345 8−Bit Bus Switch
The ON Semiconductor 74FST3345 is an 8−bit, high performance switch. The...
Description
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74FST3345 8−Bit Bus Switch
The ON Semiconductor 74FST3345 is an 8−bit, high performance switch. The device is CMOS TTL compatible when operating between 4 and 5.5 Volts. The device exhibits extremely low RON and adds nearly zero propagation delay. The device adds no noise or ground bounce to the system. The device consists of an 8−bit switch with two Output/Enable pins (OE and OE).
Features
20 20 1 SOIC−20 DW SUFFIX CASE 751D FST3345 AWLYYWW 1
http://onsemi.com MARKING DIAGRAMS
RON t 4 W Typical Less Than 0.25 ns−Max Delay Through Switch Nearly Zero Standby Current No Circuit Bounce Control Inputs are TTL/CMOS Compatible Pin−For−Pin Compatible with QS3345, FST3345, CBT3345 All Popular Packages: QSOP−20, TSSOP−20, SOIC−20 All Devices in Package TSSOP are Inherently Pb−Free*
OE A0 A1 A2 A3 A4 A5 A6 A7 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC OE B0 B1 B2 B3 B4 B5 B6 B7
20 1 TSSOP−20 DT SUFFIX CASE 948E
20 FST 3345 ALYW 1 20
20 1 QSOP−20 QS SUFFIX CASE 492A B0
FST3345 AWLYWW 1
Figure 1. 20−Lead Pinout
A0 2 18
A7 OE OE
9
11
A L, WL Y W, WW
= = = =
Assembly Location Wafer Lot Year Work Week
B7
1 19
PIN NAMES
Pin OE1, OE2 1A, 2A 1B, 2B Function Description Bus Switch Enables Bus A Bus B
Figure 2. Logic Diagram TRUTH TABLE
Inputs OE X H L OE L X H Connect Connect Disconnect
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 3 of this data sheet.
*For a...
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