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參數(shù)資料
| 型號： | SN74ABT845 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Octal Bus Interface D-Type Latches With 3-State Outputs(八總線接口D觸發(fā)器(三態(tài)輸出)) |
| 中文描述： | 八路總線接口D類鎖存器與三態(tài)輸出（八總線接口?觸發(fā)器（三態(tài)輸出）） |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 117K |
| 代理商： | SN74ABT845 |
SN54ABT845, SN74ABT845
OCTAL BUS INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS169 – FEBRUARY 1991–REVISED OCTOBER 1992
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
4
recommended operating conditions (see Note 2)
SN54ABT845
MIN
4.5
2
SN74ABT845
MIN
4.5
2
UNIT
MAX
5.5
MAX
5.5
VCC
VIH
VIL
VI
IOH
IOL
t/
v
TA
NOTE 2: Unused or floating inputs must be held high or low.
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
V
V
V
V
0.8
0.8
0
VCC
–24
48
0
VCC
–32
64
mA
mA
ns/V
°
C
5
5
–55
125
–40
85
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TA = 25
°
C
TYP
SN54ABT845
MIN
SN74ABT845
MIN
UNIT
MIN
MAX
–1.2
MAX
–1.2
MAX
–1.2
VIK
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 0 V,
VCC = 5.5 V,
VCC = 5.5 V,
II = –18 mA
IOH = –3 mA
IOH = –3 mA
IOH = –24 mA
IOH = –32 mA
IOL = 48 mA
IOL = 64 mA
VI = VCC or GND
VO = 2.7 V
VO = 0.5 V
VI or VO
≤
4.5 V
VO = 5.5 V
VO = 2.5 V
V
VOH
2.5
2.5
2.5
V
3
2
3
2
3
2
2
VOL
0.55
0.55
0.55
V
0.55
±
1
50
–50
±
100
50
–180
250
30
250
II
IOZH
IOZL
IOFF
ICEX
IO§
±
1
50
±
1
50
μ
A
μ
A
μ
A
μ
A
μ
A
mA
μ
A
mA
μ
A
–50
±
100
50
–180
250
30
250
–50
Outputs high
50
–50
–140
–50
–180
250
30
250
–50
VCC= 5 5 V
VCC = 5.5 V,
VI= VCCor GND
VI = VCC or GND
IO= 0
IO = 0,
Outputs high
Outputs low
Outputs disabled
1
ICC
24
0.5
ICC
VCC = 5.5 V, One input at 3.4 V,
Other inputs at VCC or GND
VI = 2.5 V or 0.5 V
VO = 2.5 V or 0.5 V
1.5
1.5
1.5
mA
Ci
Co
pF
pF
All typical values are at VCC = 5 V.
On products compliant to MIL-STD-883, Class B, this parameter does not apply.
§Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
P
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