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參數(shù)資料
| 型號： | SN54AC245FK |
| 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)： | 5/6頁 |
| 文件大?。?/td> | 100K |
| 代理商： | SN54AC245FK |
SN54AC245, SN74AC245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS461D – FEBRUARY 1995 – REVISED DECEMBER 1996
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V
5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
TA = 25
°
C
TYP
SN54AC245
MIN
1
SN74AC245
MIN
1
UNIT
(OUTPUT)
MIN
1.5
MAX
6.5
MAX
8.5
MAX
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
A or B
B or A
3.5
7
ns
1.5
3.5
6
1
7.5
1
7
OE
A or B
1.5
5
8.5
1
10
1
9
ns
1.5
5.5
9
1
10.5
1
9.5
OE
A or B
1.5
5.5
9
1
10.5
1
10
ns
1.5
5.5
9
1
10.5
1
10
operating characteristics, V
CC
= 5 V, T
A
= 25
°
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd Power dissipation capacitance per transceiver
CL = 50 pF, f = 1 MHz
45
pF
PARAMETER MEASUREMENT INFORMATION
tPHL
tPLH
tPLH
tPHL
Input
Out-of-Phase
Output
50%
50%
50% VCC
50% VCC
50% VCC
50% VCC
VCC
0 V
VOL
VOH
VOH
VOL
In-Phase
Output
VOLTAGE WAVEFORMS
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2
×
VCC
500
500
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2
×
VCC
(see Note B)
Output
Waveform 2
S1 at Open
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
50% VCC
50% VCC
VCC
0 V
50% VCC
VOL + 0.3 V
50% VCC
VOH – 0.3 V
0 V
VCC
Open
VOLTAGE WAVEFORMS
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
×
VCC
Open
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
≤
1 MHz, ZO = 50
, tr
D. The outputs are measured one at a time with one input transition per measurement.
2.5 ns, tf
2.5 ns.
Figure 1. Load Circuit and Voltage Waveforms
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| SN54AC245J | 制造商:TI 制造商全稱:Texas Instruments 功能描述:OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
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