M54/74HC292/7292
M54/74HC294/7294
October 1993
PROGRAMMABLE DIVIDER/TIMER
B1R
(Plastic Package)
ORDER CODES :
M54HCXXXF1R
M74HCXXXM1R
M74HCXXXB1R
M74HCXXXC1R
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
PIN CONNECTION (top view)
.
HIGH SPEED
f
MAX
= 70 MHz (TYP.) at V
CC
= 5 V
.
LOW POWER DISSIPATION
I
CC
= 4 mA (MAX.) at T
A
= 25
o
C
.
HIGH NOISE IMMUNITY
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
.
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
.
SYMMETRICAL OUTPUT IMPEDANCE
| I
OH
|= I
OL
= 4 mA (MIN.)
.
BALANCED PROPAGATION DELAYS
t
PLH
= t
PHL
.
WIDE OPERATING VOLTAGE RANGE
V
CC
(OPR) = 2 V TO 6 V
.
PIN AND FUNCTION COMPATIBLE WITH
54/74LS292/294
DESCRIPTION
The 54/74HC292/7292 and HC294/7294 are high
speed CMOS PROGRAMMABLE DIVIDER/TIMER
fabricated with silicon C
2
MOS technology.
They achieve the high speed operation similar to
equivalent LSTTL while maintaining the CMOS low
power dissipation.
These
devices are
programmable
frequency
dividers. The types have two clock inputs, either one
may be used for clock gating. (see the function
table). The HC292/7292 can divide from 2
2
to 2
31
,
and the HC294/7294 can divide from 2
2
to 2
15
. The
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"
output configuration.
HC7292/7294 have all outputs "Totem Pole".
HC292
HC7292
HC294
HC7294
HC292
HC7292
HC294
HC7294
1/14
INPUT AND OUTPUT EQUIVALENT CIRCUIT
(TOTEM POLE OUTPUT)
PIN DESCRIPTION (HC292/7292)
PIN No
SYMBOL
NAME AND FUNCTION
4, 5
CLK1,
CLK2
input Clock
1, 2, 10,
14, 15
A to E
Program Inputs
3, 6, 13
TP1, TP2,
TP3
Test Point Outputs
11
CLR
Clear (Active LOW)
7
Q
Output
8
GND
Ground (0V)
16
V
CC
Positive Supply Voltage
IEC LOGIC SYMBOLS
TRUTH TABLE
CLEAR
CLOCK1
CLOCK2
Q OUTPUT MODE
L
X
X
CLEARED TO L
H
L
UP COUNT
H
L
H
H
X
NO CHANGE
H
X
H
INPUT AND OUTPUT EQUIVALENT CIRCUIT
(OPEN DRAIN OUTPUT, HC292/294)
PIN DESCRIPTION (HC294/7294)
PIN No
SYMBOL
NAME AND FUNCTION
4, 5
CLK1,
CLK2
input Clock
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
Positive Supply Voltage
HC292/HC7292
HC294/HC7294
M54/M74HC292/7292/294/7294
2/14
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