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CD54ACT1913A Datasheet

Presettable Synchronous 4-Bit Binary Up/Down Counters

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CD54ACT1913A pdf
SEMICONDUCTOR
June 1997
COMPLETE DATA SHEET
COMING SOON!
CD54AC191/3A
CD54ACT191/3A
Presettable Synchronous
4-Bit Binary Up/Down Counters
Description
The CD54AC191/3A and CD54ACT191/3A are asynchro-
nously presettable binary up/down synchronous counters
that utilize the Harris Advanced CMOS Logic technology.
Presetting the counter to the number on preset data inputs
(P0-P3) is accomplished by setting LOW the asynchronous
parallel load input (PL). Counting occurs when PL is HIGH.
Count Enable (CE) is LOW, and the Up/Down (U/D) input is
either LOW for up-counting or HIGH for down-counting. The
counter is incremented or decremented synchronously with
the LOW-to-HIGH transition of the clock.
When an overflow or underflow of the counter occurs, the
Terminal Count (TC) output, which is LOW during counting,
goes HIGH and remains HIGH for one clock cycle. This
output can be used for look-ahead carry in high-speed
cascading. The TC output also initiates the Ripple Clock
(RC) output which, normally HIGH, goes LOW and remains
LOW for the low-level portion of the clock pulse. These
counters can be cascaded using the Ripple Count output.
The CD54AC191/3A and CD54ACT191/3A are supplied in
16-lead dual-in-line ceramic packages (F suffix).
Functional Diagram
BINARY PRESET
P0 P1 P2 P3
15
ASYN. PARALLEL 11
LOAD ENABLE
1 10
9
CLOCK 14
UP/DOWN 5
COUNT 4
ENABLE
3 Q0
2 Q1
6 Q2
BINARY
OUTPUTS
7 Q3
12 TERMINAL
COUNT
13 RIPPLE CLOCK
ACT INPUT LOAD TABLE
INPUT
UNIT LOAD (NOTE 1)
P0 - P3, PL
0.75
CL, U/D, CE
0.85
NOTE:
1. Unit load is ICC limit specified in DC Electrical Specifications
Table, e.g., 2.4mA Max at +25oC.
Absolute Maximum Ratings
DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6V
DC Input Diode Current, IIK
For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Diode Current, IOK
For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . .±50mA
DC Output Source or Sink Current, Per Output Pin, IO
For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . . .±50mA
DC VCC or GND Current, ICC or IGND
For Up to 4 Outputs Per Device, Add ±25mA For Each
Additional Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±100mA
Power Dissipation Per Package, PD
TA = -55oC to +100oC (Package F) . . . . . . . . . . . . . . . . . . 500mW
TA = +100oC to +125oC (Package F) . . . . . . . . Derate Linearly at
8mW/oC to 300mW
Operating Temperature Range, TA
Package Type F . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC
Storage Temperature, TSTG . . . . . . . . . . . . . . . . . . -65oC to +150oC
Lead Temperature (During Soldering)
At Distance 1/16in. ± 1/32in. (1.59mm ± 0.79mm)
From Case For 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . +265oC
Unit Inserted Into a PC Board (Min Thickness 1/16in., 1.59mm)
With Solder Contacting Lead Tips Only. . . . . . . . . . . . . . . +300oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Recommended Operating Conditions
Supply Voltage Range, VCC
Unless Otherwise Specified, All Voltages Referenced to GND
TA = Full Package Temperature Range
CD54AC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V
CD54ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, VI, VO. . . . . . . . . . . . . . . . . . 0V to VCC
Operating Temperature, TA . . . . . . . . . . . . . . . . . . . -55oC to +125oC
Input Rise and Fall Slew Rate, dt/dv
at 1.5V to 3V (AC Types) . . . . . . . . . . . . . . . . . . . 0ns/V to 50ns/V
at 3.6V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 20ns/V
at 4.5V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 10ns/V
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright © Harris Corporation 1994
1
File Number 3896


Part Number CD54ACT1913A
Description Presettable Synchronous 4-Bit Binary Up/Down Counters
Maker Intersil Corporation
Total Page 1 Pages
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