© 2005 Fairchild Semiconductor Corporation ds500168 www.fairchildsemi.com
March 2000
Revised June 2005
7
4
VC
X16
3245 L
o
w

V
o
lt
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16-
Bit
Dual
Sup
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T
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T
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ans
ceive
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74VCX163245
Low Voltage 16-Bit Dual Supply Translating Transceiver
with 3-STATE Outputs
General Description
The VCX163245 is a dual supply, 16-bit translating trans-
ceiver that is designed for 2 way asynchronous communi-
cation between busses at different supply voltages 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 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 (OE) input, when
HIGH, disables both A and B Ports by placing them in a
High-Z condition. The A Port interfaces with the higher volt-
age 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 opera-
tion while maintaining low CMOS power dissipation.
Features
a73 Bidirectional interface between busses ranging from
1.65V to 3.6V
a73 Supports Live Insertion and Withdrawal (Note 1)
a73 Static Drive (I
OH
/I
OL
)
c11424 mA @ 3.0V V
CC
c11418 mA @ 2.3V V
CC
c1146 mA @ 1.65V V
CC
a73 Uses patented Quiet Seriesc165 noise/EMI reduction
circuitry
a73 Functionally compatible with 74 series 16245
a73 Latchup performance exceeds 300 mA
a73 ESD performance:
Human Body Model c332000V
Machine model c33200V
a73 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
driver.

Ordering Code:
Note 2: Ordering code “G” indicates Trays.
Note 3: Device also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Quiet Seriesc165 is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74VCX163245G
(Note 2)(Note 3)
BGA54A 54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
74VCX163245MTD
(Note 3)
MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide