74LVXC164245 Datasheet, PDF (1/4 Pages) National Semiconductor (TI) – 16-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE-R Outputs

ADVANCE INFORMATION
March 1996
74LVXC164245
16-Bit Dual Supply Configurable Voltage
Interface Transceiver with TRI-STATE Outputs
General Description
The LVXC164245 is a 48-pin dual-supply 16-bit configura-
ble voltage interface transceiver suited for PCMCIA and oth-
er real time configurable I O applications The V_CCB pin ac-
cepts a 5V supply level The ‘‘B’’ port is a dedicated 5V port
The V_CCA pin accepts a 3V-to-5V supply level The ‘‘A’’ port
is configured to track the V_CCA 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_CCA voltage source pin and I O
pins on the ‘‘A’’ 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 dur-
ing normal operation
Features
Y _{Power up down high impedance provides glitch-free}
bus loading
Y _{Allows A port and VCCA to float simultaneously when}
OE is HIGH
Y _{Bidirectional interface between 5V and 3V-to-5V buses}
Y _{Inputs compatible with TTL level}
Y _{Allow dual VCC supplies power up down easily when}
OE is HIGH
Y _{Guaranteed simultaneous switching noise level and dy-}
namic threshold performance
Y _{Available in SSOP and TSSOP packages}
Y _{Implements patented Quiet Series}TM _{EMI reduction}
circuitry
Y _{Flexible VCCA operating range}
Y _{Functionally compatible with the 74 series 16245}
Logic Symbol
Connection Diagram
Pin Assignment for
SSOP and TSSOP
Pin Names
OE_n
T R_n
A₀ – A₁₅
B₀ – B₁₅
TL F 12535 – 1
Description
Output Enable Input (Active Low)
Transmit Receive Input
Side A Inputs TRI-STATE Outputs
Side B Inputs TRI-STATE Outputs
Order Number
See NS Package
Number
SSOP
74LVXC164245MEA
74LVXC164245MEAX
MS48A
TSSOP JEDEC
74LVXC164245MTD
74LVXC164245MTDX
MTD48
C1996 National Semiconductor Corporation TL F 12535
RRD-B30M17 Printed in U S A
TL F 12535 – 2
http www national com