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IDT74LVCH245A Datasheet

  • IDT74LVCH245A

  • 3.3V CMOS OCTAL BUS TRANSCEIVER

  • IDT

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IDT74LVCH245A
3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol
V
LOAD
V
IH
V
T
V
LZ
V
HZ
C
L
V
CC(1)
= 3.3V鹵0.3V V
CC(1)
= 2.7V
6
2.7
1.5
300
300
50
6
2.7
1.5
300
300
50
V
CC(2)
= 2.5V鹵0.2V
2 x Vcc
Vcc
Vcc / 2
150
150
30
Unit
V
V
V
mV
mV
pF
SAME PHASE
INPUT TRANSITION
t
PLH
OUTPUT
t
PLH
OPPOSITE PHASE
INPUT TRANSITION
t
PHL
t
PHL
V
IH
V
T
0V
V
OH
V
T
V
OL
V
IH
V
T
0V
LVC Link
V
CC
500鈩?/div>
Pulse
(1, 2)
Generator
V
IN
D.U.T.
R
T
500鈩?/div>
C
L
V
OUT
V
LOAD
Open
GND
CONTROL
INPUT
Propagation Delay
ENABLE
DISABLE
V
IH
V
T
0V
V
LOAD/2
V
OL+
V
LZ
V
OL
V
OH
V
OH-
V
HZ
0V
LVC Link
t
PZL
OUTPUT
SWITCH
NORMALLY
V
LOAD
LOW
t
PZH
OUTPUT
SWITCH
NORMALLY
GND
HIGH
V
LOAD/2
V
T
t
PHZ
V
T
0V
t
PLZ
LVC Link
Test Circuit for All Outputs
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate
鈮?/div>
10MHz; t
F
鈮?/div>
2.5ns; t
R
鈮?/div>
2.5ns.
2. Pulse Generator for All Pulses: Rate
鈮?/div>
10MHz; t
F
鈮?/div>
2ns; t
R
鈮?/div>
2ns.
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Enable and Disable Times
SWITCH POSITION
Test
Open Drain
Disable Low
Enable Low
Disable High
Enable High
All Other Tests
Switch
V
LOAD
GND
Open
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS
CONTROL
SYNCHRONOUS
CONTROL
V
IH
V
T
0V
V
OH
V
T
V
OL
V
OH
V
T
V
OL
t
SU
t
H
t
REM
t
SU
t
H
V
IH
V
T
0V
V
IH
V
T
0V
V
IH
V
T
0V
V
IH
V
T
0V
LVC Link
INPUT
Set-up, Hold, and Release Times
t
PLH1
t
PHL1
OUTPUT 1
t
SK
(x)
t
SK
(x)
LOW-HIGH-LOW
PULSE
t
W
HIGH-LOW-HIGH
PULSE
V
T
OUTPUT 2
t
PLH2
t
PHL2
V
T
Pulse Width
LVC Link
LVC Link
t
SK
(x)
= t
PLH2
-
t
PLH1
or
t
PHL2
-
t
PHL1
Output Skew - t
SK
(
X
)
NOTES:
1. For t
SK
(o) OUTPUT1 and OUTPUT2 are any two outputs.
2. For t
SK
(b) OUTPUT1 and OUTPUT2 are in the same bank.
5

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