參數(shù)資料
型號(hào)： SN74LVCH245AGQNR
廠商： Texas Instruments, Inc.
英文描述： OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
中文描述： 八路總線收發(fā)器與三態(tài)輸出
文件頁數(shù)： 7/27頁
文件大?。?/td> 1079K
代理商： SN74LVCH245AGQNR
www.ti.com
PARAMETER MEASUREMENT INFORMATION
V
M
t
h
t
su
From Output
Under Test
C
L
(see Note A)
LOAD CIRCUIT
S1
V
LOAD
Open
GND
R
L
R
L
Data Input
Timing Input
V
I
0 V
V
I
0 V
0 V
t
w
Input
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS
PULSE DURATION
t
PLH
t
PHL
t
PHL
t
PLH
V
OH
V
OH
V
OL
V
OL
V
I
0 V
Input
Output
Waveform 1
S1 at V
LOAD
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
V
OL
V
OH
t
PZL
t
PZH
t
PLZ
t
PHZ
V
LOAD
/2
0 V
V
OL
+ V
V
OH
- V
≈
0 V
V
I
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
Output
Output
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
Open
V
LOAD
GND
TEST
S1
NOTES: A. C
L
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.
Waveform2 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, Z
O
= 50
.
D. The outputs are measured one at a time with, one transition per measurement.
E. t
PLZ
and t
PHZ
are the same as t
dis
.
F. t
PZL
and t
PZH
are the same as t
en
.
G. t
PLH
and t
PHL
are the same as t
pd
.
H. All parameters and waveforms are not applicable to all devices.
Output
Control
V
M
V
M
V
M
V
M
V
M
V
M
V
M
V
M
V
M
V
M
V
M
V
M
V
I
V
M
V
M
1.8 V
±
0.15 V
2.5 V
±
0.2 V
2.7 V
3.3 V
±
0.3 V
1 k
500
500
500
V
CC
R
L
2
×
V
CC
2
×
V
CC
6 V
6 V
V
LOAD
C
L
30 pF
30 pF
50 pF
50 pF
0.15 V
0.15 V
0.3 V
0.3 V
V
V
CC
V
CC
2.7 V
2.7 V
V
I
V
CC
/2
V
CC
/2
1.5 V
1.5 V
V
M
t
r
/t
f
≤
2 ns
≤
2 ns
≤
2.5 ns
≤
2.5 ns
INPUTS
SN54LVCH245A, SN74LVCH245A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCES008O–JULY 1995–REVISED DECEMBER 2005
Figure 1. Load Circuit and Voltage Waveforms
7
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SN74LVCH245ANS 制造商:Texas Instruments 功能描述:
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SN74LVCH245ANSRE4 功能描述:總線收發(fā)器 20-BIT FET BUS SWITCH RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
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