74LVXC3245
器件描述：8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
器件厂商：FAIRCHILD [Fairchild Semiconductor]
文件大小：70.03KB，共8页
Sponsor by e络盟器件资料摘要：
© 2003 Fairchild Semiconductor Corporation DS012008 www.fairchildsemi.com
February 1994
Revised October 2003
7
4
L
VXC324
5 8-
Bit
Dual
Supp
ly
Confi
gurabl
e
V
o
l
t
a
g
e I
n
ter
f
ac
e T
r
anscei
ver
wit
h
3-
ST
A
T
E
Output
s
74LVXC3245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with 3-STATE Outputs
General Description
The LVXC3245 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 3V supply level. The A Port is a dedicated 3V
port. The V
CCB
pin accepts a 3V-to-5V supply level. The B
Port is configured to track the V
CCB
supply level respec-
tively. 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. The A Port should interface with a 3V host system
and the B Port to the card slots. 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
a73 Bidirectional interface between 3V and 3V-to-5V buses
a73 Control inputs compatible with TTL level
a73 Outputs source/sink up to 24 mA
a73 Guaranteed simultaneous switching noise level and
dynamic threshold performance
a73 Implements patented EMI reduction circuitry
a73 Flexible V
CCB
operating range
a73 Allows B Port and V
CCB
to float simultaneously when OE
is HIGH
a73 Functionally compatible with the 74 series 245
Ordering Code:
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
Order Number Package Number Package Description
74LVXC3245WM M24B 224-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LVXC3245QSC MQA24 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
74LVXC3245MTC MTC24 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE Output Enable Input
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs
B
0
–B
7
Side B Inputs or 3-STATE Outputs
February 1994
Revised October 2003
7
4
L
VXC324
5 8-
Bit
Dual
Supp
ly
Confi
gurabl
e
V
o
l
t
a
g
e I
n
ter
f
ac
e T
r
anscei
ver
wit
h
3-
ST
A
T
E
Output
s
74LVXC3245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with 3-STATE Outputs
General Description
The LVXC3245 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 3V supply level. The A Port is a dedicated 3V
port. The V
CCB
pin accepts a 3V-to-5V supply level. The B
Port is configured to track the V
CCB
supply level respec-
tively. 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. The A Port should interface with a 3V host system
and the B Port to the card slots. 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
a73 Bidirectional interface between 3V and 3V-to-5V buses
a73 Control inputs compatible with TTL level
a73 Outputs source/sink up to 24 mA
a73 Guaranteed simultaneous switching noise level and
dynamic threshold performance
a73 Implements patented EMI reduction circuitry
a73 Flexible V
CCB
operating range
a73 Allows B Port and V
CCB
to float simultaneously when OE
is HIGH
a73 Functionally compatible with the 74 series 245
Ordering Code:
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
Order Number Package Number Package Description
74LVXC3245WM M24B 224-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LVXC3245QSC MQA24 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
74LVXC3245MTC MTC24 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE Output Enable Input
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs
B
0
–B
7
Side B Inputs or 3-STATE Outputs