74LVX4245 8-Bit Dual Supply Translating Transceiver with 3-STATE Outputs
January 1993
Revised September 2003
74LVX4245
8-Bit Dual Supply Translating Transceiver
with 3-STATE Outputs
General Description
The LVX4245 is a dual-supply, 8-bit translating transceiver
that is designed to interface between a 5V bus and a 3V
bus in a mixed 3V/5V supply environment. The Transmit/
Receive (T/R) input determines the direction of data flow.
Transmit (active-HIGH) enables data from A Ports to B
Ports; Receive (active-LOW) enables data from B Ports to
A Ports. The Output Enable input, when HIGH, disables
both A and B Ports by placing them in a high impedance
condition. The A Port interfaces with the 5V bus; the B Port
interfaces with the 3V bus.
The LVX4245 is suitable for mixed voltage applications
such as laptop computers using 3.3V CPU鈥檚 and 5V LCD
displays.
Features
s
Bidirectional interface between 5V and 3V buses
s
Control inputs compatible with TTL level
s
5V data flow at A Port and 3V data flow at B Port
s
Outputs source/sink 24 mA at 5V bus; 12 mA at 3V bus
s
Guaranteed simultaneous switching noise level and
dynamic threshold performance
s
Implements patented EMI reduction circuitry
s
Functionally compatible with the 74 series 245
Ordering Code:
Order Number
74LVX4245WM
74LVX4245QSC
74LVX4245MTC
Package Number
M24B
MQA24
MTC24
Package Description
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Logic Symbol
Pin Descriptions
Pin Names
OE
T/R
A
0
鈥揂
7
Description
Output Enable Input
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
Connection Diagram
B
0
鈥揃
7
Truth Table
Inputs
OE
L
L
H
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Outputs
T/R
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
HIGH-Z State
漏 2003 Fairchild Semiconductor Corporation
DS011540
www.fairchildsemi.com
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