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Электронный компонент: CD74ACT191M

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1
Data sheet acquired from Harris Semiconductor
SCHS243
CD74AC191,
CD74ACT191
Presettable Synchronous 4-Bit Binary
Up/Down Counter
Features
Buffered Inputs
Typical Propagation Delay
- 12.8ns at V
CC
= 5V, T
A
= 25
o
C, C
L
= 50pF
Exceeds 2kV ESD Protection MIL-STD-883, Method
3015
SCR-Latchup-Resistant CMOS Process and Circuit
Design
Speed of Bipolar FASTTM/AS/S with Significantly
Reduced Power Consumption
Balanced Propagation Delays
AC Types Feature 1.5V to 5.5V Operation and
Balanced Noise Immunity at 30% of the Supply
24mA Output Drive Current
- Fanout to 15 FASTTM ICs
- Drives 50
Transmission Lines
Description
The CD74AC191 and CD74ACT191 are asynchronously
presettable binary up/down synchronous counters that utilize
the Harris Advanced CMOS Logic technology. Presetting the
counter to the number on preset data inputs (P0-P3) is
accomplished by setting LOW the asynchronous parallel
load input (PL). Counting occurs when PL is HIGH, Count
Enable (CE) is LOW, and the Up/Down (U/D) input is either
LOW for up-counting or HIGH for down-counting. The
counter is incremented or decremented synchronously with
the LOW-to-HIGH transition of the clock.
When an overflow or underflow of the counter occurs, the
Terminal Count (TC) output, which is LOW during counting,
goes HIGH and remains HIGH for one clock cycle. This out-
put can be used for look-ahead carry in high-speed cascad-
ing (see Figure 12). The TC output also initiates the Ripple
Clock (RC) output which, normally HIGH, goes LOW and
remains LOW for the low-level cascaded using the Ripple
Count output.
Pinout
CD74AC191, CD74ACT191
(PDIP, SOIC)
TOP VIEW
Ordering Information
PART
NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
CD74AC191E
0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld PDIP
E16.3
CD74ACT191E
0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld PDIP
E16.3
CD74AC191M
0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld SOIC
M16.15
CD74ACT191M
0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld SOIC
M16.15
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer and die for this part number is available which meets all elec-
trical specifications. Please contact your local sales office or Harris
customer service for ordering information.
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
P1
Q1
Q0
CE
U/D
Q2
GND
Q3
V
CC
CP
RC
TC
PL
P2
P3
P0
October 1998
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FASTTM is a Trademark of Fairchild Semiconductor.
Copyright
Harris Corporation 1998
File Number
1911.1
OBSOLETE PR
ODUCT
No Recommended Replacement
2
Functional Diagram
TRUTH TABLE
INPUTS
FUNCTION
PL
CE
U/D
CP
H
L
L
Count Up
H
L
H
Count Down
L
X
X
X
Asynchronous Preset
H
H
X
X
No Change
U/D or CE should be changed only when clock is high.
X = Don't Care
= Low-to-High clock transition.
ASYN. PARALLEL
CLOCK
UP/DOWN
11
14
5
15
1
10
9
3
2
6
7
12
Q0
Q1
Q2
Q3
TERMINAL
P0
P1
P2
P3
BINARY
PRESET
COUNT
4
13
RIPPLE CLOCK
ENABLE
LOAD ENABLE
COUNT
BINARY
OUTPUTS
CD74AC191, CD74ACT191
3
Absolute Maximum Ratings
Thermal Information
DC Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 6V
DC Input Diode Current, I
IK
For V
I
< -0.5V or V
I
> V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . . . .
20mA
DC Output Diode Current, I
OK
For V
O
< -0.5V or V
O
> V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . .
50mA
DC Output Source or Sink Current per Output Pin, I
O
For V
O
> -0.5V or V
O
< V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . .
50mA
DC V
CC
or Ground Current, I
CC or
I
GND
(Note 3)
. . . . . . . . .
100mA
Operating Conditions
Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . -55
o
C to 125
o
C
Supply Voltage Range, V
CC
(Note 4)
AC Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V
ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, V
I
, V
O
. . . . . . . . . . . . . . . . . 0V to V
CC
Input Rise and Fall Slew Rate, dt/dv
AC Types, 1.5V to 3V . . . . . . . . . . . . . . . . . . . . . . . . . 50ns (Max)
AC Types, 3.6V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . 20ns (Max)
ACT Types, 4.5V to 5.5V. . . . . . . . . . . . . . . . . . . . . . . 10ns (Max)
Thermal Resistance (Typical, Note 5)
JA
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
___
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
___
Maximum Junction Temperature (Hermetic Package or Die) . . . 175
o
C
Maximum Storage Temperature Range . . . . . . . . . .-65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300
o
C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
3. For up to 4 outputs per device, add
25mA for each additional output.
4. Unless otherwise specified, all voltages are referenced to ground.
5.
JA
is measured with the component mounted on an evaluation PC board in free air.
DC Electrical Specifications
PARAMETER
SYMBOL
TEST
CONDITIONS
V
CC
(V)
25
o
C
-40
o
C TO
85
o
C
-55
o
C TO
125
o
C
UNITS
V
I
(V)
I
O
(mA)
MIN
MAX
MIN
MAX
MIN
MAX
AC TYPES
High Level Input Voltage
V
IH
-
-
1.5
1.2
-
1.2
-
1.2
-
V
3
2.1
-
2.1
-
2.1
-
V
5.5
3.85
-
3.85
-
3.85
-
V
Low Level Input Voltage
V
IL
-
-
1.5
-
0.3
-
0.3
-
0.3
V
3
-
0.9
-
0.9
-
0.9
V
5.5
-
1.65
-
1.65
-
1.65
V
High Level Output Voltage
V
OH
V
IH
or V
IL
-0.05
1.5
1.4
-
1.4
-
1.4
-
V
-0.05
3
2.9
-
2.9
-
2.9
-
V
-0.05
4.5
4.4
-
4.4
-
4.4
-
V
-4
3
2.58
-
2.48
-
2.4
-
V
-24
4.5
3.94
-
3.8
-
3.7
-
V
-75
(Note 6, 7)
5.5
-
-
3.85
-
-
-
V
-50
(Note 6, 7)
5.5
-
-
-
-
3.85
-
V
CD74AC191, CD74ACT191
4
Low Level Output Voltage
V
OL
V
IH
or V
IL
0.05
1.5
-
0.1
-
0.1
-
0.1
V
0.05
3
-
0.1
-
0.1
-
0.1
V
0.05
4.5
-
0.1
-
0.1
-
0.1
V
12
3
-
0.36
-
0.44
-
0.5
V
24
4.5
-
0.36
-
0.44
-
0.5
V
75
(Note 6, 7)
5.5
-
-
-
1.65
-
-
V
50
(Note 6, 7)
5.5
-
-
-
-
-
1.65
V
Input Leakage Current
I
I
V
CC
or
GND
-
5.5
-
0.1
-
1
-
1
A
Quiescent Supply Current
MSI
I
CC
V
CC
or
GND
0
5.5
-
8
-
80
-
160
A
ACT TYPES
High Level Input Voltage
V
IH
-
-
4.5 to
5.5
2
-
2
-
2
-
V
Low Level Input Voltage
V
IL
-
-
4.5 to
5.5
-
0.8
-
0.8
-
0.8
V
High Level Output Voltage
V
OH
V
IH
or V
IL
-0.05
4.5
4.4
-
4.4
-
4.4
-
V
-24
4.5
3.94
-
3.8
-
3.7
-
V
-75
(Note 6, 7)
5.5
-
-
3.85
-
-
-
V
-50
(Note 6, 7)
5.5
-
-
-
-
3.85
-
V
Low Level Output Voltage
V
OL
V
IH
or V
IL
0.05
4.5
-
0.1
-
0.1
-
0.1
V
24
4.5
-
0.36
-
0.44
-
0.5
V
75
(Note 6, 7)
5.5
-
-
-
1.65
-
-
V
50
(Note 6, 7)
5.5
-
-
-
-
-
1.65
V
Input Leakage Current
I
I
V
CC
or
GND
-
5.5
-
0.1
-
1
-
1
A
Quiescent Supply Current
MSI
I
CC
V
CC
or
GND
0
5.5
-
8
-
80
-
160
A
Additional Supply Current per
Input Pin TTL Inputs High
1 Unit Load
I
CC
V
CC
-2.1
-
4.5 to
5.5
-
2.4
-
2.8
-
3
mA
NOTES:
6. Test one output at a time for a 1-second maximum duration. Measurement is made by forcing current and measuring voltage to minimize
power dissipation.
7. Test verifies a minimum 50
transmission-line-drive capability at 85
o
C, 75
at 125
o
C.
ACT Input Load Table
INPUT
UNIT LOAD
P0-P3, PL
0.75
CL, U/D, CE
0.85
NOTE: Unit load is
I
CC
limit specified in DC Electrical Specifications
Table, e.g., 2.4mA max at 25
o
C.
DC Electrical Specifications
(Continued)
PARAMETER
SYMBOL
TEST
CONDITIONS
V
CC
(V)
25
o
C
-40
o
C TO
85
o
C
-55
o
C TO
125
o
C
UNITS
V
I
(V)
I
O
(mA)
MIN
MAX
MIN
MAX
MIN
MAX
CD74AC191, CD74ACT191
5
Prerequisite For Switching Function
PARAMETER
SYMBOL
V
CC
(V)
-40
o
C TO 85
o
C
-55
o
C TO 125
o
C
UNITS
MIN
MAX
MIN
MAX
AC TYPES
Max. Frequency
f
MAX
(Note 10)
1.5
5.5
-
4.8
-
MHz
3.3
(Note 8)
49
-
43
-
MHz
5
(Note 9)
68
-
60
-
MHz
CP Pulse Width
t
W
1.5
91
-
104
-
ns
3.3
10.5
-
11.6
-
ns
5
7.3
-
8.3
-
ns
PL Pulse Width
t
W
1.5
66
-
75
-
ns
3.3
7.4
-
8.4
-
ns
5
5.3
-
6
-
ns
Recovery Time
t
REC
1.5
71
-
81
-
ns
3.3
8
-
9.1
-
ns
5
5.7
-
6.5
-
ns
Set-Up Time, Pn to PL
t
SU
1.5
44
-
50
-
ns
3.3
4.9
-
5.6
-
ns
5
3.5
-
4
-
ns
Set-Up Time, CE to CP
t
SU
1.5
115
-
131
-
ns
3.3
12.9
-
14.7
-
ns
5
9.2
-
10.5
-
ns
Set-Up Time, U/D to CP
t
SU
1.5
132
-
150
-
ns
3.3
14.7
-
16.8
-
ns
5
10.5
-
12
-
ns
Hold Time, Pn to PL
t
H
1.5
22
-
25
-
ns
3.3
2.5
-
2.8
-
ns
5
2
-
2
-
ns
Hold Time, CE to CP
t
H
1.5
0
-
0
-
ns
3.3
0
-
0
-
ns
5
0
-
0
-
ns
Hold Time, U/D to CP
t
H
1.5
0
-
0
-
ns
3.3
0
-
0
-
ns
5
0
-
0
-
ns
ACT TYPES
Max. Frequency
f
MAX
(Note 10)
5
(Note 9)
68
-
60
-
MHz
CP Pulse Width
t
W
5
7.3
-
8.3
-
ns
PL Pulse Width
t
W
5
5.3
-
6
-
ns
Recovery Time
t
REC
5
5.7
-
6.5
-
ns
Set-Up Time, Pn to PL
t
SU
5
3.5
-
4
-
ns
CD74AC191, CD74ACT191