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| 型號： | SN54BCT125AFK |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | KPT 55C 55#20 SKT RECP |
| 中文描述： | 翻兩番總線緩沖器門，三態(tài)輸出 |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 491K |
| 代理商： | SN54BCT125AFK |
SN54BCT125A, SN74BCT125A
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
SCBS032F
–
SEPTEMBER 1988
–
REVISED MARCH 2003
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.
F. All parameters and waveforms are not applicable to all devices.
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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