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National Semiconductor Electronic Components Datasheet

SCAN182245A Datasheet

Non-Inverting Transceiver

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February 1996
SCAN182245A
Non-Inverting Transceiver with
25X Series Resistor Outputs
General Description
The SCAN182245A is a high performance BiCMOS bidirec-
tional line driver featuring separate data inputs organized
into dual 9-bit bytes with byte-oriented output enable and
direction control signals This device is compliant with
IEEE 1149 1 Standard Test Access Port and Boundary
Scan Architecture with the incorporation of the defined
boundary-scan test logic and test access port consisting of
Test Data Input (TDI) Test Data Out (TDO) Test Mode Se-
lect (TMS) and Test Clock (TCK)
Features
Y High performance BiCMOS technology
Y 25X series resistors in outputs eliminate the need for
external terminating resistors
Y Dual output enable control signals
Y TRI-STATE outputs for bus-oriented applications
Y 25 mil pitch SSOP (Shrink Small Outline Package)
Y IEEE 1149 1 (JTAG) Compliant
Y Includes CLAMP IDCODE and HIGHZ instructions
Y Additional instructions SAMPLE-IN SAMPLE-OUT and
EXTEST-OUT
Y Power Up TRI-STATE for hot insert
Y Member of National’s SCAN Products
Connection Diagram
Pin Names
A1(0 – 8)
B1(0 – 8)
A2(0 – 8)
B2(0 – 8)
G1 G2
DIR1 DIR2
Description
Side A1 Inputs or TRI-STATE Outputs
Side B1 Inputs or TRI-STATE Outputs
Side A2 Inputs or TRI-STATE Outputs
Side B2 Inputs or TRI-STATE Outputs
Output Enable Pins (Active Low)
Direction of Data Flow Pins
Order Number
SCAN182245ASSC
SCAN182245ASSCX
SCAN182245AFMQB
Description
SSOP in Tubes
SSOP Tape and Reel
Flatpak Military
TL F 11657 – 1
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1996 National Semiconductor Corporation TL F 11657
RRD-B30M36 Printed in U S A
http www national com


National Semiconductor Electronic Components Datasheet

SCAN182245A Datasheet

Non-Inverting Transceiver

No Preview Available !

Truth Tables
Inputs
G1 DIR1
LL
LL
LH
LH
HX
A1(0–8) B1(0–8)
HwH
LwL
HxH
LxL
ZZ
Functional Description
The SCAN182245A consists of two sets of nine non-invert-
ing bidirectional buffers with TRI-STATE outputs and is in-
tended for bus-oriented applications Direction pins (DIR1
and DIR2) LOW enables data from B ports to A ports when
HIGH enables data from A ports to B ports The Output
Enable pins (G1 and G2) when HIGH disables both A and B
ports by placing them in a high impedance condition
Inputs
G2 DIR2
A2(0 – 8)
B2(0 – 8)
LL
LL
LH
LH
HX
HwH
LwL
HxH
LxL
ZZ
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Z e High Impedance
e Inactive-to-Active transition must occur to enable outputs upon
power-up
Block Diagrams
A1 B1 G1 and DIR1
Note BSR stands for Boundary Scan Register
http www national com
2
TL F 11657 – 2


Part Number SCAN182245A
Description Non-Inverting Transceiver
Maker National Semiconductor
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SCAN182245A Datasheet PDF






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