Datasheet IN74AC161N Datasheet (INTEGRAL)

Presettable Counter

High-Speed Silicon-Gate CMOS

The IN74AC161 is identical in pinout to the LS/ALS161, HC/HCT161. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALS outputs.

The IN74AC161 is programmable 4-bit synchronous modulo-16 counter that feature parallel Load, asynchronous Reset, a Carry Output for cascading and count-enable controls.

The IN74AC161 is binary counter with asynchronous Reset.

•

Outputs Directly Interface to CMOS, NMOS, and TTL

•

Operating Voltage Range: 2.0 to 6.0 V

•

Low Input Current: 1.0 µA; 0.1 µA @ 25° C

•

High Noise Immunity Characteristic of CMOS Devices

•

Outputs Source/Sink 24 mA

LOGIC DIAGRAM

TECHNICAL DATA

IN74AC161

ORDERING INFORMATION

IN74AC161N Plastic

IN74AC161D SOIC

TA = -40° to 85° C for all

packages

PIN ASSIGNMENT

Outputs

PIN 16 =V

PIN 8 = GND

Reset Load EnablePEnableTClockQ0Q1Q2Q3 Function

L X X X X L L L L Reset to “0” H L X X P0 P1 P2 P3 Preset Data H H X L No change No count H H L X No change No count H H H H Count up Count H X X X No change No count

X=don’t care P0,P1,P2,P3 = logic level of Data inputs Ripple Carry Out = Enable T • Q0 • Q1 • Q2 • Q3

CC

FUNCTION TABLE

Inputs Outputs

213

IN74AC161

MAXIMUM RATINGS

*

Symbol Parameter Value Unit

V

CC

V

OUT

I

IN

I

OUT

I

CC

P

DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V DC Input Voltage (Referenced to GND) -0.5 to VCC +0.5 V

IN

DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V DC Input Current, per Pin DC Output Sink/Source Current, per Pin DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Plastic DIP+

D

SOIC Package+

±

20

±

50

±

50

750 500

Tstg Storage Temperature -65 to +150

T

Lead Temperature, 1 mm from Case for 10 Seconds

L

260

(Plastic DIP or SOIC Package)

*

Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. +Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C

SOIC Package: : - 7 mW/°C from 65° to 125°C

mA mA mA

mW

°

C

°

C

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min Max Unit

V

CC

VIN, V

T

J

T

A

I

OH

I

OL

tr, t

f

*

VIN from 30% to 70% V

This device c ontains p rote ction ci rcuitr y to guard a gainst damage d ue to high st atic voltages or electr ic fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, V GND≤(V

Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V Unused outputs must be left open.

DC Supply Voltage (Referenced to GND) 2.0 6.0 V DC Input Voltage, Output Voltage (Referenced to GND) 0 V

OUT

Junction Temperature (PDIP) 140 Operating Temperature, All Package Types -40 +85 Output Current - High -24 mA Output Current - Low 24 mA Input Rise and Fall Time

(except Schmitt Inputs)

IN

or V

OUT

)≤VCC.

CC

*

V V V

=3.0 V

CC

=4.5 V

CC

=5.5 V

CC

and V

IN

0 0 0

should be constrained to the range

OUT

CC

150

40 25

V

°

C

°

C

ns/V

CC

).

214

IN74AC161

DC ELECTRICAL CHARACTERISTICS

(Voltages Referenced to GND)

Symbol Parameter Test Conditions V

V

Minimum High-Level

IH

V

=0.1 V or VCC-0.1 V 3 .0

OUT

Input Voltage

V

Maximum Low -

IL

V

= VCC-0.1 V or 0.1 V 3.0

OUT

Level Input Voltage

V

OH

Minimum High-Level

I

OUT

≤ -50 µA

Output Voltage

*

VIN=VIH or V

IL

IOH=-12 mA I

=-24 mA

OH

I

=-24 mA

OH

V

OL

Maximum Low-Level

I

OUT

≤ 50 µA

Output Voltage

*

VIN=VIH or V

IL

IOL=12 mA I

=24 mA

OL

I

=24 mA

OL

I

IN

Maximum Input

VIN=VCC or GND 5.5

Leakage Current

I

OLD

+Minimum Dynamic

V

=1.65 V Max 5.5 75 mA

OLD

Output Current

I

OHD

+Minimum Dynamic

V

=3.85 V Min 5.5 -75 mA

OHD

Output Current

I

CC

Maximum Quiescent

VIN=VCC or GND 5.5 8.0 8.0 Supply Current (per Package)

*

All outputs loaded; thresholds on input associated with output under test. +Maximum test duration 2.0 ms, one output loaded at a time. Note: I

IN

and I

@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V

CC

V

4.5

5.5

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

CC

Guaranteed Limits

25 °C-40

2.1

3.15

3.85

0.9

1.35

1.65

2.9

4.4

5.4

2.56

3.86

4.86

0.1

0.36

±

0.1

°

C to

85°C

2.1

3.15

3.85

0.9

1.35

1.65

2.9

4.4

5.4

2.46

3.76

4.76

0.1

0.44

±

1.0

CC

Unit

V

µ

A

µ

A

215

IN74AC161

AC ELECTRICAL CHARACTERISTICS

(CL=50pF,Input tr=tf=3.0 ns)

Symbol Parameter V

f

t

max

PLH

PHL

PLH

Maximum Clock Frequency (Figur e 1) 3.3

Propagat ion Delay, Clock to Q (Figure 1) 3.3

Propagation Delay, Clock to Ripple Carry Out (Figure 1)

t

PHL

Propagation Delay, Clock to Ripple Carry Out (Figure 1)

t

PLH

Propagation Delay, Enable T to Ripple Carry Out (Figure 3)

t

PHL

Propagation Delay, Enable T to Ripple Carry Out (Figure 3)

t

PHL

Propagation Delay, Reset to Q (Figure 2) 3.3

Propagation Delay, Reset to Ripple Carry Out (Figure 2)

C

IN

Maximum Input Capacitance 5.0 4.5 4.5 pF

*

V

CC

Min Max Min Max

5.070110

5.0

3.3

5.0

3.3

5.0

3.3

5.0

3.3

5.0

3.3

5.0

Guaranteed Limits

25 °C-40

°

C to

85°C

60 95

2.0

1.5

3.0

2.0

3.5

2.0

1.5

2.5

2.0

1.5

3.5

2.5

12.0

9.0

12.0

9.5

15.0

10.5

14.0

11.0

9.5

6.5

11.0

8.5

12.0

9.5

15.0

13.0

1.5

1.0

1.5

2.5

1.5

2.5

2.0

1.5

1.0

2.0

1.5

3.0

2.5

13.5

9.5

13.0

10.0

16.5

11.5

15.5

11.5

11.0

7.5

12.5

9.5

13.5

10.0

17.5

13.5

Unit

MHz

ns

C

PD

*

Voltage Range 3.3 V is 3.3 V ±0.3 V

Power Dissipation Capacitance 45 pF

Voltage Range 5.0 V is 5.0 V ±0.5 V

216

Typical @25°C,VCC=5.0 V

IN74AC161

TIMING REQUIREMENTS

(CL=50pF,Input tr=tf=3.0 ns)

Symbol Parameter V

t

su

Minimum Setup Time, Preset Data Inputs to Clock (Figure 4)

t

h

Minimum Hold Time, Clock to Preset Data Inputs (Figure 4)

t

su

t

h

t

su

Minimum Setup Time,Load to Clock (Figure 4) 3.3

Minimum Hold Time, Cl ock to Load (Figure 4) 3.3

Minimum Setup Time, Enable T or Enable P to Clock (Figure 5)

t

h

Minimum Hold Time, C lock to Enable T or Enable P (Figure 5)

t

w

t

w

t

w

t

rec

*

Voltage Range 3.3 V is 3.3 V ±0.3 V

Minimum Pulse Width, Clock (Load) (Figure 1) 3.3

Minimum Pulse Width, Cl ock (Count)(F igure 1) 3.3

Minimum Pulse Width, Reset (Figure 2) 3.3

Minimum Recovery Time, Reset t o Clock (Figure2)3.3

Voltage Range 5.0 V is 5.0 V ±0.5 V

V

CC

3.3

5.0

3.3

5.0

3.3

5.0

3.3

5.0

*

Guaranteed Limit

+25° C-40

°

C

Unit

to +85° C

13.5

8.5

-1.0 0

11.5

7.5 0

0.5

6.0

4.5 0

0

3.5

2.5

4.0

3.0

5.5

4.5

-0.5 0

16.0

10.5

-0.5 0

14.0

8.5 0

1.0

7.0

5.0 0

0.5

4.0

3.0

4.5

3.5

7.5

6.0 0

0.5

ns

217

IN74AC161

Figure 1. Switching Waveform Figure 2. Switching Waveform

218

Figure 3. Switching Waveform Figure 4. Switching Waveform

Figure 5. Switching Waveform

IN74AC161

Sequence illustrated in waveforms:

1. Reset outputs to zero.

2. Preset to binary twelve.

3. Count to thirteen, fourteen, fifteen, zero, one, and two.

4. Inhibit.

Figure 8. Timing Diagram

219

IN74AC161

EXPANDED LOGIC DIARAM

220