74LVXC164245 [NSC]

16-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE-R Outputs; 16位双电源配置电压接口收发器与TRI- STATE -R输出
74LVXC164245
型号: 74LVXC164245
厂家: National Semiconductor    National Semiconductor
描述:

16-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE-R Outputs
16位双电源配置电压接口收发器与TRI- STATE -R输出

文件: 总4页 (文件大小:100K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
ADVANCE INFORMATION  
March 1996  
74LVXC164245  
16-Bit Dual Supply Configurable Voltage  
Interface Transceiver with TRI-STATE Outputs  
É
General Description  
The LVXC164245 is a 48-pin dual-supply, 16-bit configura-  
ble voltage interface transceiver suited for PCMCIA and oth-  
Features  
Y
Power up/down high impedance provides glitch-free  
bus loading  
Y
er real time configurable I/O applications. The V  
pin ac-  
Allows A port and V  
OE is HIGH  
to float simultaneously when  
CCA  
CCB  
cepts a 5V supply level. The ‘‘B’’ port is a dedicated 5V port.  
The V pin accepts a 3V-to-5V supply level. The ‘‘A’’ port  
Y
Y
Y
Bidirectional interface between 5V and 3V-to-5V buses  
Inputs compatible with TTL level  
CCA  
is configured to track the V  
5V level on the V  
supply level respectively. A  
CCA  
pin will configure the I/O pins at a 5V  
CC  
level and a 3V V will configure the I/O pins at a 3V level.  
voltage source pin and I/O  
Allow dual V  
OE is HIGH  
supplies power up/down easily when  
CC  
CC  
This device will allow the V  
CCA  
Y
Guaranteed simultaneous switching noise level and dy-  
namic threshold performance  
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.  
Y
Y
Available in SSOP and TSSOP packages  
Implements patented Quiet SeriesTM EMI reduction  
circuitry  
Y
Y
Flexible V  
CCA  
operating range  
Functionally compatible with the 74 series 16245  
Logic Symbol  
Connection Diagram  
Pin Assignment for  
SSOP and TSSOP  
TL/F/12535–1  
Pin Names  
OE  
Description  
Output Enable Input (Active Low)  
Transmit/Receive Input  
n
T/R  
n
A A  
0
Side A Inputs/TRI-STATE Outputs  
Side B Inputs/TRI-STATE Outputs  
15  
B B  
0
15  
SSOP  
TSSOP JEDEC  
Order Number  
74LVXC164245MEA  
74LVXC164245MEAX  
74LVXC164245MTD  
74LVXC164245MTDX  
See NS Package  
Number  
MS48A  
MTD48  
TL/F/12535–2  
C
1996 National Semiconductor Corporation  
TL/F/12535  
RRD-B30M17/Printed in U. S. A.  
http://www.national.com  
Functional Description  
The LVXC164245 contains sixteen non-inverting bidirection-  
al buffers with TRI-STATE outputs. The device is byte con-  
trolled with each byte functioning identically, but indepen-  
dent of the other. The control pins can be shorted together  
to obtain full 16-bit operation.  
Truth Tables  
Inputs  
Inputs  
T/R  
2
Outputs  
Outputs  
OE  
1
T/R  
OE  
2
1
L
L
L
H
X
Bus B B Data to Bus A A  
0
L
L
L
H
X
Bus B B Data to Bus A A  
15  
7
0
7
7
8
8
15  
15  
Bus A A Data to Bus B B  
0
Bus A A Data to Bus B B  
15  
0
7
8
8
H
HIGH-Z State on A A , B –B  
0
H
HIGH-Z State on A A , B –B  
15 15  
7
0
7
8
8
e
e
e
e
Z High Impedance  
H
High Voltage Level  
L
Low Voltage Level  
X
Immaterial  
Logic Diagrams  
TL/F/12535–4  
TL/F/12535–3  
Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays.  
http://www.national.com  
2
Physical Dimensions inches (millimeters) unless otherwise noted  
48-Lead Molded Shrink Small Outline Package, EIAJ  
Order Number 74LVXC164245MEA or 74LVXC164245MEAX  
NS Package Number MS48A  
3
http://www.national.com  
Physical Dimensions millimeters (Continued)  
48-Lead Molded Thin Shrink Small Outline Package, JEDEC, 6.1 mm Body Width  
Order Number 74LVXC164245MTD or 74LVXC164245MTDX  
NS Package Number MTD48  
LIFE SUPPORT POLICY  
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT  
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL  
SEMICONDUCTOR CORPORATION. As used herein:  
1. Life support devices or systems are devices or  
systems which, (a) are intended for surgical implant  
into the body, or (b) support or sustain life, and whose  
failure to perform, when properly used in accordance  
with instructions for use provided in the labeling, can  
be reasonably expected to result in a significant injury  
to the user.  
2. A critical component is any component of a life  
support device or system whose failure to perform can  
be reasonably expected to cause the failure of the life  
support device or system, or to affect its safety or  
effectiveness.  
National Semiconductor  
Corporation  
National Semiconductor  
Europe  
National Semiconductor  
Southeast Asia  
National Semiconductor  
Japan Ltd.  
a
Fax: 49 (0) 180-530 85 86  
Fax: (852) 2376 3901  
Tel: 81-3-5620-7561  
Fax: 81-3-5620-6179  
Americas  
Tel: 1(800) 272-9959  
Fax: 1(800) 737-7018  
@
@
Email: europe.support nsc.com  
Email: sea.support nsc.com  
a
Deutsch Tel: 49 (0) 180-530 85 85  
a
English Tel: 49 (0) 180-532 78 32  
@
Email: support nsc.com  
a
Fran3ais Tel: 49 (0) 180-532 93 58  
a
Italiano Tel: 49 (0) 180-534 16 80  
http://www.national.com  
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.  

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