74VCXH2245 Low Voltage Bidirectional Transceiver with Bushold
June 1999
Revised July 1999
74VCXH2245
Low Voltage Bidirectional Transceiver with Bushold
and 26鈩?Series Resistors in B Outputs
General Description
The VCXH2245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus ori-
ented applications. The T/R input determines the direction
of data flow. The OE input disables both the A and B Ports
by placing them in a high impedance state. The VCXH2245
data inputs include active bushold circuitry, eliminating the
need for external pull-up resistors to hold unused or float-
ing data inputs at a valid logic level.
The 74VCXH2245 is designed for low voltage (1.65V to
3.6V) V
CC
applications. The VCXH2245 is also designed
with 26鈩?series resistance in the B Port outputs. This
design reduces line noise in applications such as memory
address drivers, clock drivers, and bus transceivers trans-
mitters
The 74VCXH2245 is fabricated with an advanced CMOS
technology to achieve high-speed operation while main-
taining low CMOS power dissipation.
Features
s
1.65V-3.6V V
CC
supply operation
s
3.6V tolerant control inputs
s
Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
s
26鈩?series resistors in B Port outputs
s
t
PD
(A to B)
4.4 ns max for 3.0V to 3.6V V
CC
5.6 ns max for 2.3V to 2.7V V
CC
9.8 ns max for 1.65V to 1.95V V
CC
s
Static Drive (I
OH
/I
OL
B outputs):
卤12
mA @ 3.0V V
CC
卤8
mA @ 2.3V V
CC
卤3
mA @ 1.65V V
CC
s
Uses patented Quiet Series鈩?noise/EMI reduction
circuitry
s
Latchup performance exceeds 300 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
Ordering Code:
Order Number
74VCXH2245WM
74VCXH2245MTC
Package Number
M20B
MTC20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300鈥?Wide
20-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
Connection Diagram
Quiet Series鈩?is a trademark of Fairchild Semiconductor Corporation.
漏 1999 Fairchild Semiconductor Corporation
ds500199
www.fairchildsemi.com
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