Intersil Corporation CD54ACT191F3A, CD54AC191F3A Datasheet

SEMICONDUCTOR

CD54AC191/3A

CD54ACT191/3A

COMPLETE DATA SHEET

June 1997

Description

The CD54AC191/3A and CD54ACT191/3A are asynchronously 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 ( Count Enable ( 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).

CE) is LOW, and the Up/Down (U/D) input is

COMING SOON!

PL). Counting occurs when PL is HIGH.

Presettable Synchronous

4-Bit Binary Up/Down Counters

Functional Diagram

BINARY PRESET

P0 P1 P2 P3

15 1 10 9

ASYN. PARALLEL

LOAD ENABLE

CLOCK

UP/DOWN

COUNT

ENABLE

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.

ACT INPUT LOAD TABLE

INPUT UNIT LOAD (NOTE 1)

TERMINAL

COUNT

RIPPLE CLOCK

BINARY OUTPUTS

Absolute Maximum Ratings

DC Supply Voltage, VCC. . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6V

DC Input Diode Current, I

For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA

DC Output Diode Current, I

For VO < -0.5V or VO > VCC + 0.5V. . . . . . . . . . . . . . . . . . . . .±50mA

DC Output Source or Sink Current, Per Output Pin, I

For VO > -0.5V or VO < VCC + 0.5V. . . . . . . . . . . . . . . . . . . . .±50mA

DC VCC or GND Current, ICC or I

For Up to 4 Outputs Per Device, Add ±25mA For Each

Additional Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±100mA

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.

GND

Power Dissipation Per Package, P

TA = -55oC to +100oC (Package F) . . . . . . . . . . . . . . . . . . 500mW

TA = +100oC to +125oC (Package F) . . . . . . . . Derate Linearly at

Operating Temperature Range, T

Package Type F. . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC

Storage Temperature, T 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

STG

8mW/oC to 300mW

. . . . . . . . . . . . . . . . . .-65oC to +150oC

Recommended Operating Conditions

Supply Voltage Range, V

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 V

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

File Number

3896