Intersil Corporation ICM7216A, ICM7216B, ICM7216D Datasheet

August 1997

ICM7216A, ICM7216B,

ICM7216D

8-Digit, Multi-Function,

Frequency Counters/Timers

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 ICM7216A and 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

• Measures Period From 0.5µs to 10s

Description

The ICM7216A and ICM7216B are 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 8-segment 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 ICM7216A and ICM7216B can function as a frequency
counter, period counter, frequency ratio (f
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 0.1µs
resolution. In 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.

) counter, time

A/fB

Features ICM7216D

• Decimal Point and Leading Zero Banking May Be
Externally Selected.

Ordering Information

TEMP.

PART NUMBER

ICM7216AlJl -25 to 85 28 Ld CERDIP F28.6
ICM7216BlPl -25 to 85 28 Ld PDIP E28.6
ICM7216DlPl -25 to 85 28 Ld PDIP E28.6

RANGE (oC) PACKAGE

PKG.

NO.

All versions of the ICM7216 incorporate leading zero
blanking. Frequency is displayed in kHz. In the ICM7216A
and ICM7216B, time is displayed in µs. The display is
multiplexed at 500Hz with a 12.2% duty cycle for each digit.
The ICM7216A is designed for common anode displays with
typical peak segment currents of 25mA. 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.

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207

| Copyright © Intersil Corporation 1999

9-10

File Number 3166.1

Pinouts

ICM7216A

COMMON ANODE

(CERDIP)

TOP VIEW

ICM7216A, ICM7216B, ICM7216D

ICM7216B

COMMON CATHODE

(PDIP)

TOP VIEW

CONTROL INPUT

INPUT B

FUNCTION INPUT

DECIMAL POINT

OUTPUT

SEG

e OUTPUT
g OUTPUT

SEG
SEG a OUTPUT

V

SEG d OUTPUT

b OUTPUT

SEG
SEG

c OUTPUT

f OUTPUT

SEG

RESET INPUT

RANGE INPUT

SS

28

1
2
3
4
5
6
7
8

9
10
11
12
13
14

INPUT A
HOLD INPUT

27
26

OSC OUTPUT

25

OSC INPUT

24

EXT OSC INPUT

23

DIGIT 1 OUTPUT
DIGIT 2 OUTPUT

22
21

DIGIT 3 OUTPUT

20

DIGIT 4 OUTPUT
DIGIT 5 OUTPUT

19
18

V

DD

17

DIGIT 6 OUTPUT

16

DIGIT 7 OUTPUT
DIGIT 8 OUTPUT

15

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

28

INPUT A
HOLD INPUT

27
26

OSC OUTPUT

25

OSC INPUT

24

EXT OSC INPUT
DECIMAL POINT

23

OUTPUT
SEG

g OUTPUT

22

e OUTPUT

21

SEG

20

a OUTPUT

SEG
SEG

d OUTPUT

19
18

V

DD

17

SEG b OUTPUT

16

c OUTPUT

SEG
SEG

f OUTPUT

15

ICM7216D

COMMON CATHODE

(PDIP)

TOP VIEW

CONTROL INPUT

MEASUREMENT IN PROGRESS

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

EX. DECIMAL POINT INPUT

RANGE INPUT

28

1
2
3
4
5
6
7
8

9
10
11
12
13
14

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
18

V

DD

17

SEG b OUTPUT

16

c OUTPUT

SEG
SEG

f OUTPUT

15

9-11

Functional Block Diagram

F

T

L

EXT

OSC

INPUT

OSC

INPUT

OSC

OUTPUT

OSC

SELECT

ICM7216A, ICM7216B, ICM7216D

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

44444444

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 ICM7216A/B only.

2. Ext DP input and MEASUREMENT IN PROGRESS output available on ICM7216D only.

9-12

ICM7216A, ICM7216B, ICM7216D

Absolute Maximum Ratings Thermal Information

Maximum Supply Voltage (VDD - VSS). . . . . . . . . . . . . . . . . . . .6.5V

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

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

Voltage On Any Input or

Output Terminal (Note 1) . . . . . . . . . . . .(VDD +0.3V) to (VSS -0.3V)

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -25oC to 85oC

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:

1. The ICM7216 may be triggered into a destructive latchup mode if either input signals are applied before the po wer supply is applied or if
input or outputs are forced to voltages exceeding VDDto VSSby more than 0.3V.

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

Thermal Resistance (Typical, Note 2) θJA (oC/W) θJC (oC/W)

CERDIP Package . . . . . . . . . . . . . . . . 50 10

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

Maximum Junction Temperature

CERDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175oC

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

Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC

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

Electrical Specifications V

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

DD

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

ICM7216A/B

Operating Supply Current, I
Supply Voltage Range (VDD -VSS), V

DD

SUPPLY

Maximum Frequency INPUT A, Pin 28, f

A(MAX)

Display Off, Unused Inputs to V
INPUT A, INPUT B Frequency at f

SS

MAX

Figure 9, Function = Frequency, Ratio,

-25mA

4.75 - 6.0 V
10 - - MHz

Unit Counter
Function = Period, Time Interval 2.5 - - MHz

Maximum Frequency INPUT B, Pin 2, f

B(MAX)

Minimum Separation INPUT A to INPUT B Time

Figure 10 2.5 - - MHz
Figure 1 250 - - ns

Interval Function
Maximum Oscillator Frequency and External Oscillator

Frequency, f
Minimum External Oscillator Frequency, f
Oscillator Transconductance, g
Multiplex Frequency, f

OSC

OSC

M

MUX

Time Between Measurements f

VDD = 4.75V, TA = 85oC 2000 - - µS
f

= 10MHz - 500 - Hz

OSC

= 10MHz - 200 - ms

OSC

10 - - MHz

- - 100 kHz

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

Input Low Voltage, V
Input High Voltage, V

INL

lNH

Input Resistance to VDD Pins 13, 24, R
Input Leakage Pins 27, 28, 2, I

ILK

IN

VIN = VDD -1.0V 100 400 - kΩ

- - 1.0 V

3.5 - - V

--20µA

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

ICM7216A

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

High Output Current, I
Low Output Current, I

OH

OL

V

= VDD -2.0V -140 -180 - mA

OUT

V

= VSS +1.0V - 0.3 - mA

OUT

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

Low Output Current, I
High Output Current, I

OL

OH

V

= VSS +1.5V 20 35 - mA

OUT

V

= VDD -2.5V - -100 - µA

OUT

Multiplex Inputs: Pins 1, 3, 14

Input Low Voltage, V
Input High Voltage, V

INL

INH

Input Resistance to VSS,R

IN

VIN = VSS +1.0V 50 100 - kΩ

- - 0.8 V

2.0 - - V

9-13

ICM7216A, ICM7216B, ICM7216D

Electrical Specifications V

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

DD

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

ICM7216B

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

Low Output Current, I
High Output Current, I

OL

OH

V

= VSS +1.3V 50 75 - mA

OUT

V

= VDD -2.5V - -100 - µA

OUT

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

High Output Current, I
Leakage Current, I

SLK

OH

V

= VDD -2.0V -10 - - mA

OUT

V

= VDD -2.5V - - 10 µA

OUT

Multiplex Inputs: Pins 1, 3, 14

Input Low Voltage, V
Input High Voltage, V

INL

lNH

Input Resistance to VDD,R

IN

VlN = VDD -2.5V 100 360 - kΩ

--V

-2.0 V

DD

VDD -0.8 - - V

ICM7216D

Operating Supply Current, I
Supply Voltage Range (VDD -VSS), V
Maximum Frequency INPUT A, Pin 28, f

DD

SUPPLY

A(MAX)

Maximum Oscillator Frequency and External Oscillator
Frequency, f

Minimum External Oscillator Frequency, f
Oscillator Transconductance, g
Multiplex Frequency, f

OSC

OSC

M

MUX

Time Between Measurements f

Display Off, Unused Inputs to V
INPUT A Frequency at f

MAX

SS

-25mA

4.75 - 6.0 V

Figure 9 10 - - MHz

10 - - MHz

- - 100 kHz
VDD = 4.75V, TA = 85oC 2000 - - µS
f

= 10MHz - 500 - Hz

OSC

= 10MHz - 200 - ms

OSC

Input Voltages: Pins 12, 27, 28

Input Low Voltage, V
Input High Voltage, V

Input Resistance to V

INL

INH

Pins 12, 24, R

DD,

Input Leakage, Pins 27, 28, I
Output Current, Pin 2, I
Output Current, Pin 2, I

OL
OH

ILK

IN

VIN = VDD -1.0V 100 400 - kΩ

VOL = +0.4V 0.36 - - mA
VOH = VDD -0.8V 265 - - µA

- - 1.0 V

3.5 - - V

--20µA

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

OL

OH

V

= +1.3V 50 75 - mA

OUT

V

= VDD -2.5V - 100 - µA

OUT

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

High Output Current, I
Leakage Current, I

SLK

OH

V

= VDD -2.0V 10 15 mA

OUT

V

= VDD -2.5V - - 10 µA

OUT

Multiplex Inputs: Pins 1, 13, 14

Input Low Voltage, V
Input High Voltage, V

lNL

INH

Input Resistance to VDD,R

lN

VIN = VDD -1.0V 100 360 - kΩ

--V

-2.0 V

DD

VDD -0.8 - - V

9-14

Timing Diagram

ICM7216A, ICM7216B, ICM7216D

INTERNAL

STORE

30ms TO 40ms

INTERNAL

RESET

MEASUREMENT

IN PROGRESS

(INTERNAL ON

7216A/B)

INPUT A

INPUT B

NOTE:

40ms

UPDATE

190ms TO 200ms

60ms

40ms

FUNCTION:
TIME INTERVAL

PRIMING

PRIMING EDGES

MEASUREMENT INTERVAL

250ns MIN

MEASURED

INTERVAL

(FIRST)

MEASURED

INTERVAL

(LAST)

1. 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)

UPDATE

Typical Performance Curves

20

15

10

FREQUENCY (MHz)

5

0

345 6

fA (MAX) FREQUENCY UNIT COUNTER,

FREQUENCY RATIO MODES

fA (MAX) fB (MAX) PERIOD,

TIME INTERVAL MODES

TA = 25oC

VDD-VSS (V)

FIGURE 2. fA(MAX), fB(MAX) AS A FUNCTION OF SUPPLY FIGURE 3. ICM7216A TYPICAL I

(mA)

DIG

I

300

200

100

4.5 ≤ VDD≤ 6.0V

0

0

85oC

123

V

DD-VOUT

-20oC

(V)

DIG

25oC

vs VDD-V

OUT

9-15