HITACHI HD74HC190

HD74HC190/HD74HC191
Synchronous Up/Down Decade Counter (Single Clock Line)
Synchronous Up/Donw 4-bit Binary Counter (Single Clock Line)
Description
The HD74HC190 and HD74HC191 are synchronous, reverside up/down counters. The HD74HC190 is a
4-bit decade counter and the HD74HC191 is a 4-bit binary counter. Synchronous counting operation is
provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each
other when so instructed by the steering logic. This mode of operation eliminates the output counting
spikes normally associated with asynchronous (ripple clock) counters.
The outputs of the four flip-flops are triggered on a low-to-high-level transition of the clock input if the
Enable G input is low. A high at Enable G inhibits counting. The direction of the count is determined by
the level of the Down/ Up (D/U) input. When D/U is low, the counter counts up and when D/U is high, it
counts down.
These counters feature a fully independent clock circuit. Changes at the control inputs (D/U) that will
modify the operating mode have no effect on the contents of the counter until clocking occurs. The
function of the counter will be dictated solely by the condition meeting the stable setup and hold times.
These counters are fully programmable; that is, the outputs may each be preset to either level by placing a
low on the load input and entering the desired data at the data inputs. The output will change to agree with
the data inputs independently of the level of the clock input. This feature allows the counters to be used as
modulo-N dividers by simply modifying the count length with the preset inputs.
Two outputs have been made available to perform the cascading function. Ripple clock and
maximum/minimum count. The latter output produces a high-level output pulse with a duration
approximately qual to one complete cycle of the clock while the count is zero (all outputs low) counting
down or maximum (9 or 15) counting up. The ripple clock output produces a low-level output pulse under
those same conditions but only while the clock input is low. The counters can be easily cascaded by
feeding the ripple clock output to the enable input of the succeeding counter if parallel clocking is used, or
to the clock input if paralle enabling is used. The maximum/minimum count output can be used to
accomplish look-ahead for high-speed operation.
HD74HC190/HD74HC191
Features
•
•
•
•
•
High Speed Operation: tpd (Clock to Q) = 22 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Pin Arrangement
Inputs
Outputs
16 VCC
Data B 1
QB 2
QB
QA 3
QA
B
A
15 Data A
Inputs
CK
Ripple
Clock
Enable G 4
G
Down/Up 5
Dn/Up Max/Min
14 Clock
13 Ripple
Clock
Inputs
QC 6
QC
QD 7
QD
Load
Outputs
12 Max/Min
11 Load
Outputs
D
C
9 Data D
GND 8
(Top view)
2
10 Data C
Inputs
HD74HC190/HD74HC191
Timing Chart
HD74HC190
Illustrated below is the following sequence:
1.
2.
3.
4.
Load (preset) to BCD seven.
Count up to eight, nine (maximum), zero, one and two.
Inhibit
Count down to one, zero (minimum), nine, eight and seven.
Load
A
B
C
D
Clock
Down/Up
Enable G
QA
QB
QC
QD
Max/Min
Ripple
Clock
7
8
9
0
Count Up
1 2
2 2 1
Inhibit
0
9
8
7
Count Down
Load
3
HD74HC190/HD74HC191
HD74HC191
Illustrated below is the following sequence:
1.
2.
3.
4.
Load (preset) to binary thirteen.
Count up to fourteen, fifteen (maximum), zero, one and two.
Inhibit
Count down to one, zero (minimum), fifteen, fourteen and thirteen.
Load
A
Data
Inputs
B
C
D
Clock
Down/Up
Enable G
QA
QB
QC
QD
Max/Min
Ripple
Clock
13 14
15
0
Count Up
Load
4
1
2
Inhibit
2
1
0
15
14 13
Count Down
HD74HC190/HD74HC191
Logic Diagram
HD74HC190
Clock
Ripple
Clock
Max/Min
Output
Down/Up
Input A
Enable G
CK P
CK A
INCL
Q
CK P
CK B
INCL
Q
CK P
CK C
INCL
Q
CK P
CK D
INCL
Q
QA
Q
Input B
QB
Q
Input C
QC
Q
Input D
QD
Q
Load
5
HD74HC190/HD74HC191
HD74HC191
Clock
Ripple
Clock
Max/Min
Output
Down/Up
Input A
Enable G
CK P
CK A
INCL
Q
CK P
CK B
INCL
Q
CK P
CK C
INCL
Q
CK P
CK D
INCL
Q
QA
Q
Input B
QB
Q
Input C
QC
Q
Input D
Load
6
Q
QD
HD74HC190/HD74HC191
DC Characteristics
Ta = –40 to
+85°C
Ta = 25°C
Item
Symbol
VCC (V) Min Typ Max Min
Max
Unit
Input voltage
VIH
2.0
1.5 —
—
1.5
—
V
4.5
3.15 —
—
3.15
—
6.0
4.2 —
—
4.2
—
2.0
—
—
0.5
—
0.5
4.5
—
—
1.35 —
1.35
6.0
—
—
1.8
—
1.8
2.0
1.9 2.0 —
1.9
—
4.5
4.4 4.5 —
4.4
—
6.0
5.9 6.0 —
5.9
—
4.5
4.18 —
—
4.13
—
I OH = –4 mA
6.0
5.68 —
—
5.63
—
I OH = –5.2 mA
2.0
—
0.0 0.1
—
0.1
4.5
—
0.0 0.1
—
0.1
6.0
—
0.0 0.1
—
0.1
4.5
—
—
0.26 —
0.33
I OL = 4 mA
6.0
—
—
0.26 —
0.33
I OL = 5.2 mA
VIL
Output voltage
VOH
VOL
Test Conditions
V
V
V
Vin = VIH or VIL I OH = –20 µA
Vin = VIH or VIL I OL = 20 µA
Input current
Iin
6.0
—
—
±0.1 —
±1.0
µA
Vin = VCC or GND
Quiescent supply
current
I CC
6.0
—
—
4.0
40
µA
Vin = VCC or GND, Iout = 0 µA
—
7
HD74HC190/HD74HC191
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = –40 to
+85°C
Ta = 25°C
Item
Symbol
VCC (V) Min Typ Max Min
Max
Unit
Maximum clock
f max
2.0
—
—
5
—
4
MHz
4.5
—
—
25
—
20
6.0
—
—
29
—
24
Propagation delay t PLH
2.0
—
—
265 —
335
time
4.5
—
21
53
—
66
6.0
—
—
45
—
56
2.0
—
—
230 —
290
4.5
—
18
46
—
58
6.0
—
—
39
—
49
2.0
—
—
120 —
150
4.5
—
14
24
—
30
6.0
—
—
20
—
26
2.0
—
—
190 —
240
4.5
—
22
38
—
48
6.0
—
—
32
—
41
2.0
—
—
250 —
315
4.5
—
26
50
—
63
6.0
—
—
43
—
54
2.0
—
—
230 —
290
4.5
—
20
46
—
58
6.0
—
—
39
—
49
2.0
—
—
130 —
165
4.5
—
14
26
—
33
6.0
—
—
22
—
28
2.0
—
—
190 —
240
4.5
—
17
38
—
48
6.0
—
—
32
—
41
2.0
80
—
—
100
—
4.5
16
8
—
20
—
6.0
14
–
—
17
—
2.0
0
—
—
0
—
4.5
0
–6
—
0
—
6.0
0
—
—
0
—
frequency
Pulse width
Hold time
8
t PHL
tw
th
ns
Test Conditions
Load to Q
Data to Q
Clock to RC
Clock to Q
Clock to max/min
Down/up to RC
G to RC
Down/up to max/min
ns
ns
HD74HC190/HD74HC191
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) (cont)
Ta = –40 to
+85°C
Ta = 25°C
Item
Symbol
VCC (V) Min Typ Max Min
Max
Unit
Setup time
t su
2.0
100 —
—
125
—
ns
4.5
20
7
—
25
—
6.0
17
—
—
21
—
Output rise/fall
t TLH
2.0
—
—
75
—
95
time
t THL
4.5
—
5
15
—
19
6.0
—
—
13
—
16
—
—
5
10
—
10
Input capacitance
Cin
Test Conditions
ns
pF
9
Unit: mm
19.20
20.00 Max
1
7.40 Max
9
6.30
16
8
1.3
0.48 ± 0.10
2.54 Min 5.06 Max
2.54 ± 0.25
0.51 Min
1.11 Max
7.62
+ 0.13
0.25 – 0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
DP-16
Conforms
Conforms
1.07 g
Unit: mm
10.06
10.5 Max
9
1
8
1.27
*0.42 ± 0.08
0.40 ± 0.06
0.10 ± 0.10
0.80 Max
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
5.5
16
0.20
7.80 +– 0.30
1.15
0° – 8°
0.70 ± 0.20
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-16DA
—
Conforms
0.24 g
Unit: mm
9.9
10.3 Max
9
1
8
0.635 Max
*0.42 ± 0.08
0.40 ± 0.06
0.15
*0.22 ± 0.03
0.20 ± 0.03
1.27
0.11
0.14 +– 0.04
1.75 Max
3.95
16
0.10
6.10 +– 0.30
1.08
0° – 8°
0.67
0.60 +– 0.20
0.25 M
*Dimension including the plating thickness
Base material dimension
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-16DN
Conforms
Conforms
0.15 g
Cautions
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copyright, trademark, or other intellectual property rights for information contained in this document.
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intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
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7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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