74LVXC4245 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs

February 1994
Revised October 2003
74LVXC4245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with 3-STATE Outputs
General Description
The LVXC4245 is a 24-pin dual-supply, 8-bit configurable
voltage interface transceiver suited for PCMCIA and other
real time configurable I/O applications. The V_CCA pin
accepts a 5V supply level. The “A” Port is a dedicated 5V
port. The V_CCB pin accepts a 3V-to-5V supply level. The
“B” Port is configured to track the V_CCB supply level
respectively. A 5V level on the V_CC pin will configure the
I/O pins at a 5V level and a 3V V_CC will configure the I/O
pins at a 3V level. This device will allow the V_CCB voltage
source pin and I/O pins on the “B” Port to float when OE is
HIGH. This feature is necessary to buffer data to and from
a PCMCIA socket that permits PCMCIA cards to be
inserted and removed during normal operation.
Features
s Bidirectional interface between 5V and 3V-to-5V buses
s Control inputs compatible with TTL level
s Outputs source/sink up to 24 mA
s Guaranteed simultaneous switching noise level and
dynamic threshold performance
s Implements patented EMI reduction circuitry
s Flexible V_CCB operating range
s Allows B Port and V_CCB to float simultaneously when OE
is HIGH
s Functionally compatible with the 74 series 245
Ordering Code:
Order Number Package Number
Package Description
74LVXC4245WM
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LVXC4245QSC
MQA24
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
74LVXC4245MTC
MTC24
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 “X” to the ordering code.
Logic Symbol
Connection Diagram
Pin Descriptions
Pin Names
Description
OE
Output Enable Input
T/R
A₀–A₇
B₀–B₇
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
© 2003 Fairchild Semiconductor Corporation DS012009
www.fairchildsemi.com