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参数资料
| 型号： | SN74F245N3 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | F/FAST SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20 |
| 封装： | PLASTIC, DIP-20 |
| 文件页数： | 11/17页 |
| 文件大小： | 697K |
| 代理商： | SN74F245N3 |
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
2–3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54F245
SN74F245
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.8
V
IIK
Input clamp current
–18
mA
IOH
High level output current
A1 thru A8
–3
mA
IOH
High-level output current
B1 thru B8
–12
–15
mA
IOL
Low level output current
A1 thru A8
20
24
mA
IOL
Low-level output current
B1 thru B8
48
64
mA
TA
Operating free-air temperature
–55
125
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F245
SN74F245
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2
V
A1 thru A8
VCC =4 5V
IOH = – 1 mA
2.5
3.4
2.5
3.4
A1 thru A8
VCC = 4.5 V
IOH = – 3 mA
2.4
3.3
2.4
3.3
VOH
B1 thru B8
VCC =4 5V
IOH = – 12 mA
2
3.2
V
B1 thru B8
VCC = 4.5 V
IOH = – 15 mA
2
3.1
Any output
VCC = 4.75 V,
IOH = – 1 mA to – 3 mA
2.7
A1 thru A8
VCC =4 5V
IOL = 20 mA
0.3
0.5
VOL
A1 thru A8
VCC = 4.5 V
IOL = 24 mA
0.35
0.5
V
VOL
B1 thru B8
VCC =4 5V
IOL = 48 mA
0.38
0.55
V
B1 thru B8
VCC = 4.5 V
IOL = 64 mA
0.42
0.55
II
A and B
VCC =5 5V
VI = 5.5 V
1
mA
II
DIR, OE
VCC = 5.5 V
VI = 7 V
0.1
mA
I
A and B
VCC =5 5V
VI =2 7V
70
A
IIH
DIR, OE
VCC = 5.5 V,
VI = 2.7 V
20
A
I
A and B
VCC =5 5V
VI =0 5V
– 0.65
mA
IIL
DIR, OE
VCC = 5.5 V,
VI = 0.5 V
– 1.2
mA
IOS§
A1 thru A8
VCC =5 5V
VO =0
–60
– 150
–60
– 150
mA
IOS§
B1 thru B8
VCC = 5.5 V,
VO = 0
– 100
– 225
– 100
– 225
mA
Outputs high
70
90
70
90
ICC
VCC = 5.5 V
Outputs low
95
120
95
120
mA
Outputs disabled
85
110
85
110
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.
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| SN74F251AD | 制造商:Texas Instruments 功能描述: |
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