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MC14526B Datenblatt(PDF) 1 Page - Motorola, Inc

Teilenummer MC14526B
Bauteilbeschribung  Presettable 4-Bit Down Counters
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Hersteller  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC14526B Datenblatt(HTML) 1 Page - Motorola, Inc

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MOTOROLA CMOS LOGIC DATA
1
MC14522B MC14526B
Presettable 4-Bit Down Counters
The MC14522B BCD counter and the MC14526B binary counter are
constructed with MOS P–channel and N–channel enhancement mode
devices in a monolithic structure.
These devices are presettable, cascadable, synchronous down counters
with a decoded “0” state output for divide–by–N applications. In single stage
applications the “0” output is applied to the Preset Enable input. The
Cascade Feedback input allows cascade divide–by–N operation with no
additional gates required. The Inhibit input allows disabling of the pulse
counting function. Inhibit may also be used as a negative edge clock.
These complementary MOS counters can be used in frequency synthesiz-
ers, phase–locked loops, and other frequency division applications requiring
low power dissipation and/or high noise immunity.
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Logic Edge–Clocked Design — Incremented on Positive Transition of
Clock or Negative Transition of Inhibit
• Asynchronous Preset Enable
• Capable of Driving Two Low–power TTL Loads or One Low–power
Schottky TTL Load Over the Rated Temperature Range
MAXIMUM RATINGS* (Voltages Referenced to VSS)
Symbol
Parameter
Value
Unit
VDD
DC Supply Voltage
– 0.5 to + 18.0
V
Vin, Vout Input or Output Voltage (DC or Transient)
– 0.5 to VDD + 0.5
V
Iin, Iout
Input or Output Current (DC or Transient),
per Pin
± 10
mA
PD
Power Dissipation, per Package†
500
mW
Tstg
Storage Temperature
– 65 to + 150
_C
TL
Lead Temperature (8–Second Soldering)
260
_C
* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/
_C From 65_C To 125_C
Ceramic “L” Packages: – 12 mW/
_C From 100_C To 125_C
FUNCTION TABLE
Inputs
Output
Resulting
Function
Clock
Reset
Inhibit
Preset
Enable
Cascade
Feedback
“0”
Resulting
Function
X
X
X
H
H
H
X
X
X
L
H
X
L
L
H
L
H
H
Asynchronous reset*
Asynchronous reset
Asynchronous reset
X
X
X
H
H
H
X
X
X
L
H
X
L
L
H
L
H
H
Asynchronous reset*
Asynchronous reset
Asynchronous reset
X
H
X
X
H
H
Asynchronous reset
X
L
X
H
X
L
Asynchronous preset
L
L
L
H
L
L
X
X
L
L
Decrement inhibited
Decrement inhibited
L
L
L
X
L
Decrement inhibited
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
No change** (inactive edge)
No change** (inactive edge)
Decrement**
Decrement**
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
No change** (inactive edge)
No change** (inactive edge)
Decrement**
Decrement**
H
L
L
L
L
L
L
L
L
L
Decrement**
Decrement**
H
L
L
L
L
Decrement**
X = Don’t Care
NOTES:
* Output “0” is low when reset goes high only it PE and CF are low.
** Output “0” is high when reset is low, only if CF is high and count is 0000.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
© Motorola, Inc. 1995
REV 3
1/94
MC14522B
MC14526B
L SUFFIX
CERAMIC
CASE 620
ORDERING INFORMATION
MC14XXXBCP
Plastic
MC14XXXBCL
Ceramic
MC14XXXBDW
SOIC
TA = – 55° to 125°C for all packages.
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
This device contains protection circuitry to
guard against damage due to high static
voltages or electric fields. However, pre-
cautions must be taken to avoid applications of
any voltage higher than maximum rated volt-
ages to this high–impedance circuit. For proper
operation, Vin and Vout should be constrained
to the range VSS v (Vin or Vout) v VDD.
Unused inputs must always be tied to an
appropriate logic voltage level (e.g., either VSS
or VDD). Unused outputs must be left open.
PIN ASSIGNMENT
13
14
15
16
9
10
11
12
5
4
3
2
1
8
7
6
“0”
CF
P2
Q2
VDD
Q1
RESET
P1
INHIBIT
PE
P3
Q3
VSS
Q0
CLOCK
P0


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