Page 1
HD74HC292/HD74HC294
Programmable Frequency Divider/Digital Timer
Description
This device divides the incoming clock frequency by a number (a power of 2) that is preset by the
Programming inputs. It has two Clock inputs, either of which may be used as a clock inhibit. The device
also has an active-low Reset, which initializes the internal flip-flop states. Test Point outputs (TP1, TP2,
TP3) are provided with HD74HC292 to facilitate incoming inspections.
Test Point output is provided with HD74HC294 to facilitate incoming inspections.
Features
• High Speed Operation: tpd (Clock to Q) = 16 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)
Function Table
CLR CLK1 CLK2 Q Output Mode
L X X Cleared to L
H L Count
HL Count
H H X Inhibit
H X H Inhibit
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HD74HC292/HD74HC294
HD74HC292
Programming
Inputs Frequency Division
Q Out TP1 TP2 TP3
E D C B A Binary Decimal Binary Decimal Binary Decimal Binary Decimal
L L L L L Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit
L L L L H Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit
L LLHL 2
L LLHH 2
LLHLL 2
LLHLH 2
LLHHL 2
LLHHH 2
LHLLL 2
LHLLH 2
LHLHL 2
LHLHH 2
L HHL L 2
L HHL H 2
L HHHL 2
L HHHH 2
HLLLL 2
HLLLH 2
HLLHL 2
HLLHH 2
HLHLL 2
HLHLH 2
HLHHL 2
HLHHH 2
HHLLL 2
HHLLH 2
HHLHL 2
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
1,048,576 2
2,097,152 2
4,194,304 Disabled LOW 2
8,388,608 Disabled LOW 2
16,777,216 2
33,554,432 2
67,108,864 2
429512 2
829512 2
16 2
32 2
64 2
128 2
256 2
512 2
1,024 2
2,048 2
4,096 2
8,192 2
16,384 2
32,768 2
65,536 2
131,072 2
262,144 2
524,288 2
HHLHH 227134,217,728 2
H HHL L 228268,435,456 2
H HHL H 229536,870,912 2
H HHHL 2301,073,741,824 2
H HHHH 2312,147,483,648 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 Disabled LOW 2
9
512 Disabled LOW 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
9
512 2
3
3
5
5
7
7
9
9
82112,048 2
82112,048 2
32 2
32 2
128 2
128 2
512 2
512 2
17
131,072 22416,777,216
17
131,072 22416,777,216
17
131,072 22416,777,216
17
131,072 22416,777,216
17
131,072 22416,777,216
17
131,072 22416,777,216
17
131,072 2
17
131,072 2
17
131,072 2
17
131,072 2
17
131,072 2
17
131,072 2
3
3
5
5
7
7
9
9
13
13
15
15
17
17
82101,024
82101,024
32 2
32 2
128 2
128 2
512 2
512 2
8,192 2
8,192 2
32,768 2
32,768 2
131,072 22416,777,216
131,072 22416,777,216
2
2
4
4
6
6
8
8
12
12
14
14
16
16
18
18
20
20
22
22
16
16
64
64
256
256
4,096
4,096
16,384
16,384
65,536
65,536
262,144
262,144
1,048,576
1,048,576
4,194,304
4,194,304
4
4
2
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HD74HC292/HD74HC294
HD74HC294
Programming Inputs Frequency Division
Q Output TP Output
D C B A Binary Decimal Binary Decimal
L L L L Inhibit Inhibit Inhibit Inhibit
L L L H Inhibit Inhibit Inhibit Inhibit
LL H L 2
LL H H 2
LH L L 2
LH L H 2
LH H L 2
LH H H 2
HL L L 2
HL L H 2
2
3
4
5
6
7
8
9
42
82
16 2
32 2
64 2
128 Disabled LOW
256 2
512 2
HL H L 2101,024 2
HL H H 2112,048 2
HH L L 2124,096 2
HH L H 2138,192 2
HH H L 21416,384 2
HH H H 21532,768 2
9
9
9
9
9
2
3
4
5
6
7
8
9
512
512
512
512
512
16
32
64
128
256
512
4
8
3
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HD74HC292/HD74HC294
R
Pin Arrangement
HD74HC292
HD74HC294
TP1
CLK1
CLK2
TP2
GND
1
B
2
E
3
4
5
6
7
Q
8
(Top view)
1
B
16
15
14
13
12
11
10
16
V
CC
C
D
TP3
NC
CL
A
9
NC
V
CC
2
A
3
TP
NC
4
5
6
7
Q
8
(Top view)
CLK1
CLK2
GND
4
15
14
13
12
11
10
C
D
NC
NC
CLR
NC
9
NC
Page 5
Logic Diagram
HD74HC292
CLR
CLK1
CLK2
HD74HC292/HD74HC294
RCKR
D D
RRR
RR
RRR
RR
TP
TP
TP
Q
1
2
3
MCCKR
0
1
14
13
12
11
10
A
B
C
D
E
9
2
4
8
8
7
6
6
5
4
3
2
DDD
RDMCCKR
D
MCCKR
DDD
R
MCCKR
DDD
5
Page 6
HD74HC292/HD74HC294
HD74HC294
CLR
CLK1
CLK2
0
1
14
13
12
11
10
9
8
1
A
2
B
4
C
8
D
7
6
5
4
3
2
TP
Q
6
Page 7
HD74HC292/HD74HC294
DC Characteristics
Ta = –40 to
Ta = 25°C
Item Symbol V
Input voltage V
IH
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 1.5 — — 1.5 — V
4.5 3.15 — — 3.15 —
6.0 4.2 — — 4.2 —
V
IL
2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
Output voltage V
OH
2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 — IOH = –4 mA
6.0 5.68 — — 5.63 — IOH = –5.2 mA
V
OL
2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33 IOL = 4 mA
6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply
I
CC
6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
current
+85°C
7
Page 8
HD74HC292/HD74HC294
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = –40 to
Ta = 25°C
Item Symbol V
Maximum clock f
max
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 — — 5 — 4 MHz
frequency 4.5 — — 27 — 21
6.0 — — 31 — 24
Propagation delay t
PLH
2.0 — — 600 — 750 ns Clock to output
time 4.5 — 16 120 — 150
6.0 — — 100 — 125
Removal time t
rem
2.0 100 — — 125 — ns
4.5 20 –4 — 25 —
6.0 17 — — 21 —
Pulse width t
w
2.0 80 — — 100 — ns
4.5 16 14 — 20 —
6.0 14 – — 17 —
Output rise/fall t
time t
TLH
THL
2.0 — — 75 — 95 ns
4.5 — 5 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
+85°C
8
Page 9
19.20
20.00 Max
16 9
1.3
Unit: mm
6.30
7.40 Max
81
1.11 Max
2.54 ± 0.25
0.48 ± 0.10
5.06 Max
2.54 Min
0.51 Min
Hitachi Code
JEDEC
EIAJ
Weight
7.62
+ 0.13
0.25
– 0.05
0° – 15°
(reference value)
DP-16
Conforms
Conforms
1.07 g
Page 10
16
Unit: mm
10.06
10.5 Max
9
5.5
1
0.80 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
8
0.12
0.10 ± 0.10
0.15
M
2.20 Max
7.80
0.20 ± 0.04
*0.22 ± 0.05
0.70 ± 0.20
Hitachi Code
JEDEC
EIAJ
(reference value)
Weight
+ 0.20
– 0.30
1.15
0° – 8°
FP-16DA
—
Conforms
0.24 g
Page 11
16
Unit: mm
9.9
10.3 Max
9
1
1.27
0.635 Max
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
8
0.25
+ 0.11
– 0.04
0.14
0.15
3.95
1.75 Max
M
6.10
1.08
0.20 ± 0.03
*0.22 ± 0.03
0.60
Hitachi Code
JEDEC
EIAJ
Weight
+ 0.10
– 0.30
0° – 8°
+ 0.67
– 0.20
(reference value)
FP-16DN
Conforms
Conforms
0.15 g
Page 12
Cautions
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received the latest product standards or specifications before final design, purchase or use.
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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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written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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