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SN74LVC4245A Datasheet(PDF) 6 Page - Texas Instruments

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Part No. SN74LVC4245A
Description  OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74LVC4245A Datasheet(HTML) 6 Page - Texas Instruments

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PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2
× VCC
Open
GND
500
500
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
NONINVERTING OUTPUTS
tPLH
tPHL
VOH
VOL
Output
Control
Output
Waveform 1
S1 at 2
× VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
1.5 V
1.5 V
VCC
0 V
VOL + 0.3 V
VOH - 0.3 V
≈0 V
3 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
Output
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
× VCC
GND
TEST
S1
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. All parameters and waveforms are not applicable to all devices.
VCC
0 V
1.5 V
Input
50% VCC
50% VCC
50% VCC
1.5 V
50% VCC
VCC
0 V
1.5 V
1.5 V
tw
Input
VOLTAGE WAVEFORMS
PULSE DURATION
SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS
SCAS375H – MARCH 1994 – REVISED MARCH 2005
A PORT
Figure 1. Load Circuit and Voltage Waveforms
6


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