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参数资料
| 型号： | SN74AHC245DBRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | AHC/VHC/H/U/V SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 |
| 封装： | GREEN, PLASTIC, SSOP-20 |
| 文件页数： | 15/21页 |
| 文件大小： | 794K |
| 代理商： | SN74AHC245DBRG4 |
SN54AHC245, SN74AHC245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS230I – OCTOBER 1995 – REVISED JULY 2003
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54AHC245
SN74AHC245
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
2
5.5
2
5.5
V
VCC = 2 V
1.5
VIH
High-level input voltage
VCC = 3 V
2.1
V
VCC = 5.5 V
3.85
VCC = 2 V
0.5
VIL
Low-level input voltage
VCC = 3 V
0.9
V
VCC = 5.5 V
1.65
VI
Input voltage
OE or DIR
0
5.5
0
5.5
V
VO
Output voltage
A or B
0
VCC
0
VCC
V
VCC = 2 V
–50
mA
IOH
High-level output current
VCC = 3.3 V ± 0.3 V
–4
mA
VCC = 5 V ± 0.5 V
–8
mA
VCC = 2 V
50
mA
IOL
Low-level output current
VCC = 3.3 V ± 0.3 V
4
mA
VCC = 5 V ± 0.5 V
8
mA
t/v Input transition rise or fall rate
VCC = 3.3 V ± 0.3 V
100
ns/V
t/v Input transition rise or fall rate
VCC = 5 V ± 0.5 V
20
ns/V
TA
Operating free-air temperature
–55
125
–40
85
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C
SN54AHC245
SN74AHC245
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
1.9
2
1.9
IOH = –50 mA
3 V
2.9
3
2.9
VOH
4.5 V
4.4
4.5
4.4
V
IOH = –4 mA
3 V
2.58
2.48
IOH = –8 mA
4.5 V
3.94
3.8
2 V
0.1
IOL = 50 mA
3 V
0.1
VOL
4.5 V
0.1
V
IOL = 4 mA
3 V
0.36
0.5
0.44
IOL = 8 mA
4.5 V
0.36
0.5
0.44
I
A or B inputs
V
or GND
5.5 V
±0.1
±1
A
II
OE or DIR
VI = VCC or GND
0 V to 5.5 V
±0.1
±1*
±1
mA
IOZ
VO = VCC or GND,
VI (OE) = VIL or VIH
5.5 V
±0.25
±2.5
mA
ICC
VI = VCC or GND,
IO = 0
5.5 V
4
40
mA
Ci
OE or DIR
VI = VCC or GND
5 V
2.5
10
pF
Cio
A or B inputs
VI = VCC or GND
5 V
4
pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
The parameter IOZ includes the input leakage current.
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