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參數(shù)資料
| 型號： | SN54F242 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| 中文描述： | 翻兩番總線收發(fā)器與三態(tài)輸出 |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 75K |
| 代理商： | SN54F242 |
SN54F242, SN74F242
QUADRUPLE BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS062A – D2932, MARCH 1987 – REVISED OCTOBER 1993
2–4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F242
MIN
TYP
SN74F242
MIN
TYP
UNIT
MAX
MAX
VIK
VCC = 4.5 V,
II = –18 mA
IOH = – 3 mA
IOH = – 12 mA
IOH = – 15 mA
IOH = – 3 mA
IOL = 48 mA
IOL = 64 mA
VI = 5.5 V
VI = 7 V
–1.2
–1.2
V
2.4
3.3
2.4
3.3
VOH
VCC = 4.5 V
2
3.2
V
2
3.1
VCC = 4.75 V,
2.7
VOL
VCC= 4 5 V
VCC = 4.5 V
0.38
0.55
V
0.42
0.55
II
A or B port
VCC= 5 5 V
VCC = 5.5 V
1
1
mA
Control inputs
A or B port
0.1
0.1
IIH
VCC= 5 5 V
VCC = 5.5 V,
VI= 2 7 V
VI = 2.7 V
70
70
μ
A
Control inputs
20
20
IIL
IOS§
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.5 V
VO = 0
Outputs high
– 1
– 1
mA
–100
–225
–100
–225
mA
VCC = 5.5 V,
See Note 2
5 5 V
30
46
30
46
ICC
Outputs low
Outputs disabled
46
42
69
63
46
42
69
63
mA
All typical values are at VCC = 5 V, TA = 25
°
C.
For I/O ports, the parameters IIH and IIL include the off-state output current.
§Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
NOTE 2: ICC is measured either with all transceivers enabled in only one direction or all transceivers disabled.
switching characteristics (see Note 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
RL = 500
,
TA = 25
°
C
′
F242
MIN
2.2
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500
,
TA = MIN to MAX
SN54F242
MIN
MAX
2.2
9
UNIT
SN74F242
MIN
2.2
TYP
4.1
MAX
6.5
MAX
7.5
tPLH
tPHL
tPZL
tPZH
tPHZ
tPLZ
A or B
B or A
ns
1
2.6
4.5
0.5
5
1
4.5
Enable
A or B
2.7
5.6
7.5
2.2
10
2.7
8.5
ns
2.7
6.1
9
2.2
12
2.7
10.5
Disable
A or B
1.8
6.6
9
1.8
11
1.8
9.5
ns
2.7
5.6
9.5
2.3
13.5
2.7
11
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 3: Load circuits and waveforms are shown in Section 1.
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