參數(shù)資料
型號： SN74AVCH245DW
廠商： Texas Instruments, Inc.
英文描述： OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
中文描述： 八路總線收發(fā)器具有三態(tài)輸出
文件頁數(shù)： 8/12頁
文件大?。?/td> 177K
代理商： SN74AVCH245DW
SN74AVCH245
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES264C – APRIL 1999 – REVISED DECEMBER 1999
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
V
CC
= 1.2 V AND 1.5 V
±
0.1 V
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VOH
VOL
th
tsu
From Output
Under Test
CL = 15 pF
(see Note A)
LOAD CIRCUIT
S1
Open
GND
2 k
2 k
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2
×
VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
tPZL
tPZH
tPLZ
tPHZ
0 V
VOL + 0.1 V
VOH – 0.1 V
0 V
VCC
0 V
0 V
tw
VCC
VCC
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
Timing
Input
Data
Input
Input
tpd
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
, tr
≤
2 ns, tf
≤
2 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
0 V
VCC
VCC/2
tPHL
VCC/2
VCC/2
VCC
0 V
VOH
VOL
Input
Output
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VCC/2
VCC/2
tPLH
2
×
VCC
VCC
Figure 2. Load Circuit and Voltage Waveforms
P
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