SCAN18245T PDF даташит
Спецификация SCAN18245T изготовлена «National Semiconductor» и имеет функцию, называемую «Non-Inverting Transceiver with TRI-STATE Outputs». |
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Детали детали
Номер произв | SCAN18245T |
Описание | Non-Inverting Transceiver with TRI-STATE Outputs |
Производители | National Semiconductor |
логотип |
16 Pages
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September 1998
SCAN18245T
Non-Inverting Transceiver with TRI-STATE® Outputs
General Description
The SCAN18245T is a high speed, low-power bidirectional
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 Select (TMS), and Test
Clock (TCK).
Features
n IEEE 1149.1 (JTAG) Compliant
n Dual output enable control signals
n TRI-STATE outputs for bus-oriented applications
n 9-bit data busses for parity applications
n Reduced-swing outputs source 24 mA/sink 48 mA
n Guaranteed to drive 50Ω transmission line to TTL input
levels of 0.8V and 2.0V
n TTL compatible inputs
n 25 mil pitch Cerpack package
n Includes CLAMP and HIGHZ instructions
n Available as Known Good Die
n Standard Microcircuit Drawing (SMD) 5962-9311501
Connection Diagram
Pin Names
B1(0–8)
A2(0–8)
B2(0–8)
G1, G2
DIR1, DIR2
Description
Side B1 Inputs or TRI-STATE Outputs
Side A2 Inputs or TRI-STATE Outputs
Side B2 Inputs or TRI-STATE Outputs
Output Enable Pins
Direction of Data Flow Pins
DS100320-1
Pin Names
Description
A1(0–8)
Side A1 Inputs or TRI-STATE Outputs
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100320
www.national.com
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Truth Tables
Inputs
G1 DIR1
LL
LL
LH
LH
HX
A1 B1
(0–8)
(0–8)
H←H
L←L
H→H
L→L
ZZ
Inputs
G2 DIR2
LL
LL
LH
LH
A2 B2
(0–8)
(0–8)
H←H
L←L
H→H
L→L
HX
Z
Z
H= HIGH Voltage Level
L= LOW Voltage Level
X= Immaterial
Z= High Impedance
Functional Description
The SCAN18245 consists of two sets of nine non-inverting
bidirectional buffers with TRI-STATE outputs and is intended
for bus-oriented applications. Direction pins (DIR1 and DIR2)
LOW enables data from B ports to A ports, when HIGH en-
Block Diagrams
ables 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.
A1, B1, G1 and DIR1
Note: BSR stands for Boundary Scan Register.
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2
DS100320-2
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Block Diagrams (Continued)
Tap Controller
A2, B2, G2 and DIR2
DS100320-3
Note: BSR stands for Boundary Scan Register.
DS100320-4
3 www.national.com
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Номер в каталоге | Описание | Производители |
SCAN18245T | Non-Inverting Transceiver with TRI-STATE Outputs | National Semiconductor |
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