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SN74BVT245DWR Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce SN74BVT245DWR
Description  OCTAL BUS TRANSCEIVERS OCTAL BUS TRANSCEIVERS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

SN74BVT245DWR Fiches technique(HTML) 5 Page - Texas Instruments

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SN54BCT245, SN74BCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS013H – SEPTEMBER 1998 – REVISED MAY 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR
≤ 10 MHz, tr = tf ≤ 2.5 ns, duty cycle = 50%.
C. 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.
D. The outputs are measured one at a time with one transition per measurement.
E. When measuring propagation delay times of 3-state outputs, switch S1 is open.
From Output
Under Test
Test
Point
R1
CL
(see Note A)
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
LOAD CIRCUIT FOR
3-STATE AND OPEN-COLLECTOR OUTPUTS
R1
S1
7 V (tPZL, tPLZ, O.C.)
Open
(all others)
From Output
Under Test
Test
Point
R2
CL
(see Note A)
RL = R1 = R2
1.5 V
1.5 V
1.5 V
3 V
3 V
0 V
0 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing Input
(see Note B)
Data Input
(see Note B)
1.5 V
1.5 V
3 V
3 V
0 V
0 V
High-Level
Pulse
(see Note B)
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATION
1.5 V
1.5 V
tPHL
tPLH
tPLH
tPHL
Input
(see Note B)
Out-of-Phase
Output
(see Note D)
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
3 V
0 V
VOL
VOH
VOH
VOL
In-Phase
Output
(see Note D)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (see Note D)
tPHZ
tPLZ
0.3 V
tPZL
tPZH
1.5 V
1.5 V
1.5 V
1.5 V
3 V
0 V
Output
Control
(low-level enable)
Waveform 1
(see Notes C and D)
Waveform 2
(see Notes C and D)
0 V
VOH
VOL
3.5 V
0.3 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
Figure 1. Load Circuit and Voltage Waveforms


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