SGS Thomson Microelectronics M74HC7294, M74HC7292, M74HC294, M74HC292 Datasheet

PROGRAMMABLE DIVIDER/TIMER

.HIGH SPEED

f

= 70 MHz(TYP.) at VCC=5V

MAX

.LOWPOWERDISSIPATION

ICC=4 mA(MAX.) at TA=25oC

.HIGH NOISEIMMUNITY

V

NIH=VNIL

=28%VCC(MIN.)

.OUTPUT DRIVECAPABILITY

10 LSTTL LOADS

.SYMMETRICALOUTPUT IMPEDANCE

|IOH|=IOL=4 mA(MIN.)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.WIDE OPERATINGVOLTAGERANGE

VCC(OPR)= 2V TO 6 V

.PIN AND FUNCTION COMPATIBLE WITH

54/74LS292/294

DESCRIPTION

The 54/74HC292/7292 and HC294/7294 are high
speedCMOS PROGRAMMABLEDIVIDER/TIMER
fabricated with silicon C2MOStechnology.

They achieve the high speed operation similar to
equivalent LSTTL while maintaining the CMOSlow
power dissipation.

These devices are programmable frequency
dividers. Thetypeshavetwoclockinputs,eitherone
may be used for clock gating. (see the function
table). The HC292/7292 can divide from 22to 231,
and theHC294/7294 can divide from22to215. The

M54/74HC292/7292

M54/74HC294/7294

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC X XXF1R M74HC XXXM1R
M74HC X XXB1R M74H CXXXC1R

types feature an active-low clear input to initialize
the state of all flip-flops. To facilitate incoming
inspection, test points are provided. (TP1, TP2 and
TP3 on the HC292/7292 and TP on the
HC294/7294). All inputs are equipped with
protection circuits against static discharge and
transient excess voltage.

HC292/294 have Q output with ”Totem pole”
configuration and test point TP with ”Open Drain”
outputconfiguration.

HC7292/7294 have all outputs ”Totem Pole”.

F1R

(CeramicPackage)

C1R

(Chip Carrier)

PIN CONNECTION (top view)

HC292

HC7292

October 1993

HC294

HC7294

HC292

HC7292

HC294

HC7294

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M54/M74HC292/7292/294/7294

INPUT AND OUTPUT EQUIVALENT CIRCUIT

(TOTEM POLE OUTPUT)

PIN DESC RIPTION (HC292/7292)

PIN No SYMBOL NAME AND FUNCTION

4, 5 CLK1,

CLK2

1, 2, 10,

14, 15

3, 6, 13 TP1, TP2,

11 CLR Clear (Active LOW)

7 Q Output
8 GND Ground (0V)

16 V

A to E Program Inputs

TP3

CC

input Clock

Test Point Outputs

Positive Supply Voltage

INPUT AND OUTPUT EQUIVALENT CIRCUIT

(OPEN DRAIN OUTPUT, HC292/294)

PIN DESCRIPTION ( HC294/ 7294)

PIN No SYMBOL NAME AND FUNCTION

4, 5 CLK1,

CLK2

1, 2, 14, 15 A to D Program Inputs

3 TP1 Test Point Output

11 CLR Clear (Active LOW)

7 Q Output
8 GND Ground (0V)

16 V

CC

input Clock

Positive Supply Voltage

IEC LOGIC SYMBOLS

HC292/HC7292 HC294/HC7294

TRUTH TABLE

CLEAR CLOCK1 CLOCK2 Q OUTPUT MODE

L X X CLEARED TO L
H L UP COUNT
HL
H H X NO CHANGE
HXH

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LOGIC DIAGRAM (HC292/7292)

M54/M74HC292/7292/294/7294

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M54/M74HC292/7292/294/7294

LOGIC DIAGRAM (HC294/7294)

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FUNCTION TABLE (HC292/7292)

M54/M74HC292/7292/294/7294

PROGRA MMI NG

INPUTS

Q TP1 TP2 TP3

FREQUENCY DIVISION

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
LLLHL2
LLLHH2
LLHLL2
LLHLH2
LLHHL2
LLHHH2
LHLLL2
LHLLH2
LHLHL2
LHLHH2
LHHLL2
LHHLH2

LHHHL2
HHHHH2
HLLLL2
HLLLH2
HLLHL2
HLLHH2
HLHLL2
HLHLH2
HLHHL2
HLHHH2
HHLLL2
HHLLH2
HHLHL2
HHLHH2
HHHLL2
HHHLH2
HHHHL2
HHHHH2

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
27
28
29
30
31

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

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

134,217,728 2
268,435,456 2

536,870,912 2
1,073,741,824 2
2,147,483,648 2

42

82
16 2
32 2
64 2

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

3
3
5
5
7
7
9
9

512 2
512 2
512 2
512 2
512 2
512 2
512 2
512 2
512 2
512 2
512 2
512 2

17
17
17
17
17
17
17
17
17
17
17
17

131,072 2
131,072 2
131,072 2
131,072 2
131,072 2
131,072 2
131,072 2
131,072 2
131,072 2
131,072 2
131,072 2

131,072 2
512 Disabled Low 2
512 Disabled Low 2
512 2
512 2
512 2
512 2
512 2
512 2

128 2
128 2
512 2
512 2

82

82
32 2
32 2

3
3
5
5
7
7
9
9
11
11
13
13
15
15
17
17

82

82
32 2
32 2

128 2
128 2
512 2

512 2
2,048 2
2,048 2
8,192 2
8,192 2

32,768 2

32,768 2
131,072 2
131,072 2

24
24
24
24
24
24
2
2
4
4
6
6
8
8
10
10
12
12
14
14
16
16
18
18
20
20
22
22
24
24

16,777,216
16,777,216
16,777,216
16,777,216
16,777,216
16,777,216

4

4
16
16
64
64

256

256
1,024
1,024
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
16,777,216
16,777,216

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