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CD74HCT191 Scheda tecnica(PDF) 11 Page - Texas Instruments

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Il numero della parte CD74HCT191
Spiegazioni elettronici  SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD74HCT191 Scheda tecnica(HTML) 11 Page - Texas Instruments

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CD54HC190, CD74HC190
CD54HC191, CD74HC191, CD54HCT191, CD74HCT191
SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
SCHS275E − MARCH 2002 − REVISED OCTOBER 2003
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC
−0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1)
±20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1)
±20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output drain current per output, IO (VO = 0 to VCC)
±35 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output source or sink current per output, IO (VO = 0 to VCC)
±25 mA
. . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND
±50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
θJA (see Note 2): E package
67
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M package
73
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package
64
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package
108
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
−65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions for ’HC190 and ’HC191 (see Note 3)
TA = 25°C
TA = −55°C
TO 125
°C
TA = −40°C
TO 85
°C
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
2
6
2
6
2
6
V
VCC = 2 V
1.5
1.5
1.5
VIH
High-level input voltage
VCC = 4.5 V
3.15
3.15
3.15
V
VIH
High-level input voltage
VCC = 6 V
4.2
4.2
4.2
V
VCC = 2 V
0.5
0.5
0.5
VIL
Low-level input voltage
VCC = 4.5 V
1.35
1.35
1.35
V
VIL
Low-level input voltage
VCC = 6 V
1.8
1.8
1.8
V
VI
Input voltage
0
VCC
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
0
VCC
V
VCC = 2 V
1000
1000
1000
tt
Input transition (rise and fall) time
VCC = 4.5 V
500
500
500
ns
tt
Input transition (rise and fall) time
VCC = 6 V
400
400
400
ns
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.
recommended operating conditions for ’HCT191 (see Note 4)
TA = 25°C
TA = −55°C
TO 125
°C
TA = −40°C
TO 85
°C
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
4.5
5.5
4.5
5.5
4.5
5.5
V
VIH
High-level input voltage
2
2
2
V
VIL
Low-level input voltage
0.8
0.8
0.8
V
VI
Input voltage
VCC
VCC
VCC
V
VO
Output voltage
VCC
VCC
VCC
V
tt
Input transition (rise and fall) time
500
500
500
ns
NOTE 4: 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.


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