Intersil Corporation ICM7216BLPL, ICM7216DLPL Datasheet

TM

ICM7216B, ICM7216D

Data Sheet February 2002

8-Digit, Multi-Function, Frequency
Counters/Timers

The ICM7216B is a fully integrated Timer Counters with LED
display drivers. They combine a high frequency oscillator, a
decade timebase counter, an 8-decade data counter and
latches, a 7-segment decoder, digit multiplexers and 8­segment and 8-digit drivers which directly drive large
multiplexed LED displays. The counter inputs have a
maximum frequency of 10MHz in frequency and unit counter
modes and 2MHz in the other modes. Both inputs are digital
inputs. In many applications, amplification and level shifting
will be required to obtain proper digital signals for these
inputs.

The ICM7216B can function as a frequency counter, period
counter, frequency ratio (fA/fB) counter, time interval counter
or as a totalizing counter. The counter uses either a 10MHz
or 1MHz quartz crystal timebase. For period and time
interval, the 10MHz timebase gives a 0.1
period average and time interval average, the resolution can
be in the nanosecond range. In the frequency mode, the
user can select accumulation times of 0.01s, 0.1s, 1s and
10s. With a 10s accumulation time, the frequency can be
displayed to a resolution of 0.1Hz in the least significant
digit. There is 0.2s between measurements in all ranges.

The ICM7216D functions as a frequency counter only, as
described above.

All versions of the ICM7216 incorporate leading zero
blanking. Frequency is displayed in kHz. In the ICM7216B,
time is displayed in
with a 12.2% duty cycle for each digit. The ICM7216B and
ICM7216D are designed for common cathode displays with
typical peak segment currents of 12mA. In the display off
mode, both digit and segment drivers are turned off,
enabling the display to be used for other functions.

µ

s. The display is multiplexed at 500Hz

µ

s resolution. In

FN3166.3

Features, All Versions

• Functions as a frequency counter (DC to 10MHz)

•Four internal gate times: 0.01s, 0.1s, 1s, 10s in frequency
counter mode

• Directly drives digits and segments of large multiplexed
LED displays (common anode and common cathode
versions)

• Single nominal 5V supply required

• Highly stable oscillator, uses 1MHz or 10MHz crystal

• Internally generated decimal points, interdigit blanking,
leading zero blanking and overflow indication

• Display off mode turns off display and puts chip into low
power mode

• Hold and reset inputs for additional flexibility

Features, ICM7216B

• Functions also as a period counter, unit counter,
frequency ratio counter or time interval counter

•1 cycle, 10 cycles, 100 cycles, 1000 cycles in period,
frequency ratio and time interval modes

µ

• Measures period from 0.5

s to 10s

Features, ICM7216D

• Decimal point and leading zero banking may be externally
selected

Ordering Information

PART

NUMBER

ICM7216BlPl -25

ICM7216DlPl -25

TEMP. RANGE

(oC) PACKAGE PKG. NO.

∞

to 85 28 Ld PDIP E28.6

∞

to 85 28 Ld PDIP E28.6

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

|

Intersil (and design) is a trademark of Intersil Americas Inc.

Copyright © Intersil Americas Inc. 2002. All Rights Reserved

ICM7216B

Pinouts

ICM7216B

COMMON CATHODE

(PDIP)

TOP VIEW

28

CONTROL INPUT

INPUT B

FUNCTION INPUT

DIGIT 1 OUTPUT

DIGIT 3 OUTPUT

DIGIT 2 OUTPUT

DIGIT 4 OUTPUT

V

SS

DIGIT 5 OUTPUT

DIGIT 6 OUTPUT

DIGIT 7 OUTPUT

DIGIT 8 OUTPUT

RESET

INPUT

RANGE INPUT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

INPUT A

27

HOLD INPUT

26

OSC OUTPUT

25

OSC INPUT

24

EXT OSC INPUT

23

DECIMAL POINT OUTPUT

g OUTPUT

SEG

22

SEG e OUTPUT

21

20

a OUTPUT

SEG

SEG

d OUTPUT

19

18

V

DD

SEG b OUTPUT

17

16

SEG

c OUTPUT

SEG f OUTPUT

15

CONTROL INPUT

MEASUREMENT

EX. DECIMAL POINT INPUT

IN PROGRESS

DIGIT 1 OUTPUT

DIGIT 3 OUTPUT

DIGIT 2 OUTPUT

DIGIT 4 OUTPUT

DIGIT 5 OUTPUT

DIGIT 6 OUTPUT

DIGIT 7 OUTPUT

DIGIT 8 OUTPUT

RESET

RANGE INPUT

ICM7216D

COMMON CATHODE

TOP VIEW

1

2

3

4

5

6

V

7

SS

8

9

10

11

INPUT

12

13

14

(PDIP)

28

INPUT A

HOLD INPUT

27

26

OSC OUTPUT

25

OSC INPUT

24

EXT OSC INPUT

23

DECIMAL POINT OUTPUT

SEG

g OUTPUT

22

e OUTPUT

21

SEG

20

a OUTPUT

SEG

SEG

d OUTPUT

19

V

18

DD

17

SEG b OUTPUT

16

SEG

c OUTPUT

SEG

f OUTPUT

15

2

F

T

L

Functional Block Diagram

EXT

OSC

INPUT

OSC

INPUT

OSC

OUTPUT

OSC

SELECT

ICM7216B

38 8

REFERENCE

COUNTER

3

10

÷

DECODER

DIGIT

DRIVERS

DIGIT
OUTPUTS
(8)

RESET

INPUT

INPUT A

INPUT B

(NOTE 1)

INPUT

CONTROL

LOGIC

INPUT

CONTROL

LOGIC

100Hz

104 OR ÷10

÷

Q

D

CL

5

EN

CL

4 4444444

DATA LATCHES AND

MAIN

FF

MAIN

103 COUNTER

÷

OUTPUT MUX

RANGE SELECT

LOGIC

STORE AND

RESET LOGIC

OVERFLOW

STORE

RANGE

CONTROL

LOGIC

5

CONTROL

LOGIC

6

DP

LOGIC

DECODER

LOGIC

47 8

SEGMENT

DRIVER

RANGE
INPUT

CONTRO
INPUT

EXT
DP
INPUT
(NOTE 2)

SEGMEN
OUTPUTS
(8)

MEASUREMENT
IN PROGRESS
OUTPUT
(NOTE 2)

UNCTION

INPUT

(NOTE 1)

HOLD

INPUT

FN

CONTROL

LOGIC

6

NOTES:

1. Function input and input B available on ICM7216B only.

2. Ext DP input and MEASUREMENT IN PR

OGRESS output available on ICM7216D only.

3

ICM7216B

Absolute Maximum Ratings Thermal Information

Maximum Supply Voltage (V

Maximum Digit Output Current . . . . . . . . . . . . . . . . . . . . . . . .400mA

Maximum Segment Output Current . . . . . . . . . . . . . . . . . . . . .60mA

Voltage On Any Input or

Output Terminal (Note 1). . . . . . . . . . . (V

DD

- V

). . . . . . . . . . . . . . . . . . .6.5V

SS

+0.3V) to (V

DD

SS

-0.3V)

Thermal Resistance (Typical, Note 4)

PDIP Package . . . . . . . . . . . . . . . . . . . 55 N/A

Maximum Junction Temperature

PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Maximum Storage Temperature Range . . . . . . . . . .-65

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300

o

(

C/W)

θ

JA

Operating Conditions

o

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -25

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.

NOTES:

3. The ICM7216 may be triggered into a destructive latchup mode if either input signals are applied before the power supply is applied or if
input or outputs are forced to voltages exceeding V

4.

is measured with the component mounted on an evaluation PC board in free air.

θ

JA

DD

C to 85

to V

o

C

by more than 0.3V.

SS

(

θ

JC

o

C to 150

o

C/W)

o

C

o

C

o

C

Electrical Specifications

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

ICM7216B

Operating Supply Current, I

Supply Voltage Range (V

Maximum Frequency INPUT A, Pin 28, f

Maximum Frequency INPUT B, Pin 2, f

Minimum Separation INPUT A to INPUT B Time
Interval Function

Maximum Oscillator Frequency and External Oscillator
Frequency, f

Minimum External Oscillator Frequency, f

Oscillator Transconductance, g

Multiplex Frequency, f

Time Between Measurements f

Input Voltages: Pins 2, 13, 25, 27, 28

Input Low Voltage, V

Input High Voltage, V

Input Resistance to V

Input Leakage Pins 27, 28, 2, I

Input Range of Change, dV

Digit Driver: Pins 4, 5, 6, 7, 9, 10, 11, 12

Low Output Current, I

High Output Current, I

Segment Driver: Pins 15, 16, 17, 19, 20, 21, 22, 23

High Output Current, I

Leakage Current, I

Multiplex Inputs: Pins 1, 3, 14

OSC

DD

MUX

INL

lNH

Pins 13, 24, R

DD

OL

OH

OH

SLK

V

= 5.0V, V

DD

= 0V, T

SS

DD

-V

), V

SS

SUPPLY

A(MAX)

B(MAX)

OSC

M

IN

ILK

/dt Supplies Well Bypassed - 15 - mV/ µ s

lN

o

= 25

C, Unless Otherwise Specified

A

Display Off, Unused Inputs to V

INPUT A, INPUT B Frequency at f

Figure 6, Function = Frequency, Ratio,
Unit Counter

Function = Period, Time Interval 2.5 - - MHz

Figure 7 2.5 - - MHz

Figure 1 250 - - ns

V

= 4.75V, T

DD

f

= 10MHz - 500 - Hz

OSC

= 10MHz - 200 - ms

OSC

V

= V

IN

DD

V

= V

OUT

V

= V

OUT

V

= V

OUT

V

= V

OUT

= 85°C 2000 - -

A

-1.0V 100 400 - k Ω

+1.3V 50 75 - mA

SS

-2.5V - -100 -

DD

-2.0V -10 - - mA

DD

-2.5V - - 10

DD

SS

MAX

-25mA

4.75 - 6.0 V

10 - - MHz

10 - - MHz

--100 kHz

µ S

--1.0 V

3.5 - - V

--20

µ A

µ A

µ A

4

ICM7216B

Electrical Specifications V

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

Input Low Voltage, V

Input High Voltage, V

Input Resistance to V

ICM7216D

Operating Supply Current, I

Supply Voltage Range (V

Maximum Frequency INPUT A, Pin 28, f

Maximum Oscillator Frequency and External Oscillator
Frequency, f

Minimum External Oscillator Frequency, f

Oscillator Transconductance, g

Multiplex Frequency, f

Time Between Measurements f

Input Voltages: Pins 12, 27, 28

Input Low Voltage, V

Input High Voltage, V

Input Resistance to V

Input Leakage, Pins 27, 28, I

Output Current, Pin 2, I

Output Current, Pin 2, I

Input Rate of Change, dVlN/dt Supplies Well Bypassed - 15 - mV/µs

Digit Driver: Pins 3, 4, 5, 6, 8, 9, 10, 11

Low Output Current, I

High Output Current, I

Segment Driver: Pins 15, 16, 17, 19, 20, 21, 22, 23

High Output Current, I

Leakage Current, I

Multiplex Inputs: Pins 1, 13, 14

Input Low Voltage, V

Input High Voltage, V

Input Resistance to VDD, R

OSC

INL

lNH

,

DD

DD

-V

DD

MUX

INL

INH

Pins 12, 24, R

DD,

ILK

OL

OH

OL

OH

OH

SLK

lNL

INH

R

= 5.0V, VSS = 0V, TA = 25oC, Unless Otherwise Specified (Continued)

DD

V

= V

IN

SS

), V

SUPPLY

lN

Display Off, Unused Inputs to V

INPUT A Frequency at f

A(MAX)

Figure 6 10 - - MHz

-2.5V 100 360 - k

DD

SS

MAX

OSC

V

M

IN

lN

= 4.75V, T

DD

f

= 10MHz - 500 - Hz

OSC

= 10MHz - 200 - ms

OSC

V

= V

IN

DD

VOL = +0.4V 0.36 - - mA

VOH = VDD -0.8V 265 - -

V

= +1.3V 50 75 - mA

OUT

V

= VDD -2.5V - 100 -

OUT

V

= VDD -2.0V 10 15 mA

OUT

V

= VDD -2.5V - - 10 µA

OUT

VIN = VDD -1.0V 100 360 - kΩ

= 85°C 2000 - -

A

-1.0V 100 400 - k

--V

V

-

DD

0.8

-25mA

4.75 - 6.0 V

10 - - MHz

--100 kHz

--1.0 V

3.5 - - V

--20

--V

VDD -

0.8

--V

--V

DD

2.0

DD

2.0

-

V

µ S

µ

µ

µ

-

V

Ω

Ω

A

A

A

5

Timing Diagram

85oC

-20oC

4.5 ≤ VDD ≤ 6V

30

20

10

0

0 123

V

DD-VOUT

(V)

I

SEG

(mA)

25oC

INTERNAL

STORE

ICM7216B

40ms

30ms TO 40ms

INTERNAL

RESET

UPDATE

190ms TO 200ms

MEASUREMENT

IN PROGRESS

(INTERNAL ON

7216B)

INPUT A

INPUT B

NOTE:

60ms

40ms

FUNCTION:
TIME INTERVAL

PRIMING

PRIMING EDGES

MEASUREMENT INTERVAL

250ns MIN

MEASURED

INTERVAL

(FIRST)

MEASURED

INTERVAL

(LAST)

5. If range is set to 1 event, first and last measured interval will coincide.

FIGURE 1. WAVEFORMS FOR TIME INTERVAL MEASUREMENT (OTHERS ARE SIMILAR, BUT WITHOUT PRIMING PHASE)

Typical Performance Curves

UPDATE

20

15

10

FREQUENCY (MHz)

5

0

34 5 6

fA (MAX) FREQUENCY UNIT COUNTER,

T

= 25oC

A

FREQUENCY RATIO MODES

fA (MAX) fB (MAX) PERIOD,

TIME INTERVAL MODES

V

DD-VSS

(V)

FIGURE 2. fA(MAX), fB(MAX) AS A FUNCTION OF SUPPLY

FIGURE 3. TYPICAL I

SEG

vs VDD-V

OUT

6