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參數(shù)資料
| 型號(hào)： | 74F191 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Up/down binary counter with reset and ripple clock |
| 中文描述： | 上/下的復(fù)位和時(shí)鐘波紋二進(jìn)制計(jì)數(shù)器 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大?。?/td> | 104K |
| 代理商： | 74F191 |
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Philips Semiconductors
Product specification
74F191
Up/Down binary counter with reset and ripple clock
1995 Jul 17
6
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
PARAMETER
RATING
UNIT
V
CC
V
IN
I
IN
V
OUT
I
OUT
T
amb
T
stg
Supply voltage
–0.5 to +7.0
V
Input voltage
–0.5 to +7.0
V
Input current
–30 to +5.0
mA
Voltage applied to output in High output state
–0.5 to +V
CC
40
V
Current applied to output in Low output state
mA
Operating free-air temperature range
0 to +70
o
C
Storage temperature
–65 to +150
o
C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
Nom
UNIT
Min
Max
V
CC
V
IH
V
IL
I
IK
I
OH
I
OL
T
amb
Supply voltage
4.5
5.0
5.5
V
High-level input voltage
2.0
V
Low-level input voltage
0.8
V
Input clamp current
–18
mA
High-level output current
–1
mA
Low-level output current
20
mA
Operating free-air temperature range
0
70
o
C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
LIMITS
Typ
2
UNIT
Min
Max
V
OH
High level output voltage
High-level output voltage
= Min, V
= Max,
V
CC
Min, V
IL
Max,
I
OH
= Max, V
IH
= Min
±
10%V
CC
±
5%V
CC
±
10%V
CC
±
5%V
CC
2.5
V
2.7
3.4
V
V
OL
Low level output voltage
Low-level output voltage
= Min, V
= Max,
V
CC
Min, V
IL
Max,
I
OL
= Max, V
IH
= Min
0.30
0.50
V
0.30
0.50
V
V
IK
I
I
I
IH
I
IL
Input clamp voltage
V
CC
= Min, I
I
= I
IK
V
CC
= Max, V
I
= 7.0V
V
CC
= Max, V
I
= 2.7V
–0.73
–1.2
V
Input current at maximum input voltage
100
μ
A
μ
A
High-level input current
20
Low-level input current
CE
V
CC
= Max V = 0 5V
I
= 0.5V
–1.8
mA
Others
–0.6
mA
I
OS
I
CC
Short-circuit output current
3
Supply current
4
(total)
V
CC
= Max
V
CC
= Max
–60
–150
mA
40
55
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25
°
C.
3. Not more than one output should be shorted at a time. For testing I
OS
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
OS
tests should be performed last.
4. Measure I
CC
all inputs grounded and all outputs open.
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