CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright © Harris Corporation 1994 1
SEMICONDUCTOR
CD54HC4520/3A
CD54HCT4520/3A
Dual 4-Bit Synchronous Binary Counter
Functional Diagram
1CP
1Q2
5
61Q3
1Q1
41Q0
3
1
1E 2CL
R
1MR 7
÷10/÷16
2CP
2Q2
13
14 2Q3
2Q1
12 2Q0
11
9
2E 10 CL
R
2MR 15
÷10/÷16
GND = 8
VCC = 16
Description
The CD54HC4520/3A and CD54HCT4520/3A are dual
binary up-counters. Each device consists of two indepen-
dent internally synchronous four-stage counters. The
counter stages are D-type flip-flops having interchangeable
CLOCK and ENABLE lines for incrementing on either the
positive-going or the negative-going transition of CLOCK.
The counters are cleared by high levels on the MASTER
RESET lines. The counter can be cascaded in the ripple
mode by connecting Q3 to the ENABLE input of the subse-
quent counter while the CLOCK input of the latter is held low.
HCT INPUT LOAD TABLE
INPUT UNIT LOAD (NOTE 1)
MR 1.2
CP 0.25
ENABLE 0.5
NOTE:
1. Unit load is ∆ICC limit specified in DC Electrical Specifications
Table, e.g., 360µA Max at +25oC.
June 1997
File Number 3869
Absolute Maximum Ratings
DC Supply Voltage, VCC
Voltages Referenced to GND . . . . . . . . . . . . . . . . . -0.5V to +7.0V
DC Input Voltage Range, All Inputs, VIN. . . . . . . -0.5V to VCC +0.5V
DC Output Voltage Range, All Outputs, VOUT . . -0.5V to VCC +0.5V
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. . . . . . . . . . . . . . . . . . . . .±20mA
DC Drain Current, Per Output, IO, For -0.5V < VO < VCC + 0.5V
Standard Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±25mA
Bus Driver Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±35mA
DC VCC or GND Current, ICC
Standard Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±50mA
Bus Driver Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±70mA
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
TA = Full Package Temperature Range
CD54HC Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V
CD54HCT Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, VIN, VOUT. . . . . . . . . . . . . . . 0V to VCC
Operating Temperature Range, TA . . . . . . . . . . . . .-55oC to +125oC
Input Rise and Fall Times, tR, tF
at 2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0ns to 1000ns
at 4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0ns to 500ns
at 6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0ns to 400ns
COMING SOON!
COMPLETE DATA SHEET
