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74VCX163245 Low Voltage 16-Bit Dual Supply Translating Transceiver with 3-STATE Outputs
May 2007
74VCX163245
Low Voltage 16-Bit Dual Supply Translating
Transceiver with 3-STATE Outputs
Features
■
Bidirectional interface between busses ranging from
■
■
tm
General Description
The VCX163245 is a dual supply, 16-bit translating
transceiver that is designed for 2 way asynchronous
communication between busses at different supply volt-
ages by providing true signal translation. The supply rails
consist of V
CCA
, which is a higher potential rail operating
at 2.3V to 3.6V and V
CCB
, which is the lower potential
rail operating at 1.65V to 2.7V. (V
CCB
must be less than
or equal to V
CCA
for proper device operation). This dual
supply design allows for translation from 1.8V to 2.5V
busses to busses at a higher potential, up to 3.3V.
The Transmit/Receive (T/R) input determines the direc-
tion 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 (OE)
input, when HIGH, disables both A and B Ports by plac-
ing them in a High-Z condition. The A Port interfaces
with the higher voltage bus (2.7V to 3.3V); The B Port
interfaces with the lower voltage bus (1.8V to 2.5V). Also
the VCX163245 is designed so that the control pins
(T/R
n
, OE
n
) are supplied by V
CCB
.
The 74VCX163245 is suitable for mixed voltage applica-
tions such as notebook computers using a 1.8V CPU and
3.3V peripheral components. It is fabricated with an
Advanced CMOS technology to achieve high speed oper-
ation while maintaining low CMOS power dissipation.
■
■
■
■
■
1.65V to 3.6V
Supports Live Insertion and Withdrawal
(1)
Static Drive (I
OH
/I
OL
)
– ±24mA @ 3.0V V
CC
– ±18mA @ 2.3V V
CC
– ±6mA @ 1.65V V
CC
Uses
proprietary
Quiet Series™ noise/EMI reduction
circuitry
Functionally compatible with 74 series 16245
Latchup performance exceeds 300mA
ESD performance:
– Human Body Model
>2000V
– Machine model
>200V
Also packaged in plastic Fine-Pitch Ball Grid Array
(FBGA)
Note:
1. To ensure the high impedance state during power up
or power down, OE
n
should be tied to V
CCB
through a
pull up resistor. The minimum value of the resistor is
determined by the current sourcing capability of the
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