74LVXC164245MEA
器件描述：16-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE-R Outputs
器件厂商：NSC [National Semiconductor]
文件大小：103.48KB，共4页
Sponsor by e络盟器件资料摘要：
TL/F/12535
74LVXC164245
16-Bit
Dual
Supply
Configurable
Voltage
Interface
Transceiver
with
TRI-STATE
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 V
CCA
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 V
CC
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 V
CCA
operating range
Y
Functionally compatible with the 74 series 16245
Logic Symbol
TL/F/12535–1
Pin Names Description
OE
n
Output Enable Input (Active Low)
T/R
n
Transmit/Receive Input
A
0
–A
15
Side A Inputs/TRI-STATE Outputs
B
0
–B
15
Side B Inputs/TRI-STATE Outputs
SSOP TSSOP JEDEC
Order Number 74LVXC164245MEA 74LVXC164245MTD
74LVXC164245MEAX 74LVXC164245MTDX
See NS Package
MS48A MTD48
Number
Connection Diagram
Pin Assignment for
SSOP and TSSOP
TL/F/12535–2
C
1996 National Semiconductor Corporation RRD-B30M17/Printed in U. S. A. http://www.national.com
74LVXC164245
16-Bit
Dual
Supply
Configurable
Voltage
Interface
Transceiver
with
TRI-STATE
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 V
CCA
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 V
CC
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 V
CCA
operating range
Y
Functionally compatible with the 74 series 16245
Logic Symbol
TL/F/12535–1
Pin Names Description
OE
n
Output Enable Input (Active Low)
T/R
n
Transmit/Receive Input
A
0
–A
15
Side A Inputs/TRI-STATE Outputs
B
0
–B
15
Side B Inputs/TRI-STATE Outputs
SSOP TSSOP JEDEC
Order Number 74LVXC164245MEA 74LVXC164245MTD
74LVXC164245MEAX 74LVXC164245MTDX
See NS Package
MS48A MTD48
Number
Connection Diagram
Pin Assignment for
SSOP and TSSOP
TL/F/12535–2
C
1996 National Semiconductor Corporation RRD-B30M17/Printed in U. S. A. http://www.national.com