Intersil Corporation ICM7217, ICM7217AIPI, ICM7217IJI Datasheet

August 1997

ICM7217

4-Digit LED Display,

Programmable Up/Down Counter

Features

• Four Decade, Presettable Up-Down Counter with
Parallel Zero Detect

• Settable Register with Contents Continuously
Compared to Counter

• Directly Drives Multiplexed 7 Segment Common
Anode or Common Cathode LED Displays

• On-Board Multiplex Scan Oscillator

• Schmitt Trigger On Count Input

• TTL Compatible BCD I/O Port, Carry/Borrow, Equal,
and Zero Outputs

• Display Blank Control for Lower Power Operation;
Quiescent Power Dissipation <5mW

• All Terminals Fully Protected Against Static Discharge

• Single 5V Supply Operation

Description

The ICM7217 is a four digit, presettable up/down counter with
an onboard presettable register continuously compared to the
counter. The ICM7217 is intended for use in hard-wired
applications where thumbwheel switches are used for loading
data, and simple SPDT switches are used for chip control.

This circuit provides multiplexed 7 segment LED display
outputs, with common anode or common cathode
configurations available. Digit and segment drivers are
provided to directly drive displays of up to 0.8 inch
character height (common anode) at a 25% duty cycle. The
frequency of the onboard multiplex oscillator may be
controlled with a single capacitor, or the oscillator may be
allowed to free run. Leading zeros can be blanked. The
data appearing at the 7 segment and BCD outputs is
latched; the content of the counter is transferred into the
latches under external control by means of the Store pin.

The ICM7217 (common anode) and ICM7217A (common
cathode) versions are decade counters, providing a
maximum count of 9999, while the ICM7217B (common
anode) and ICM7217C (common cathode) are intended for
timing purposes, providing a maximum count of 5959.

This circuit provides 3 main outputs; a CARRY/BORROW
output, which allows for direct cascading of counters, a
ZERO output, which indicates when the count is zero, and
an

EQUAL output, which indicates when the count is equal
to the value contained in the register. Data is multiplexed to
and from the device by means of a three-state BCD I/O port.
The CARRY/BORROW,
BCD port will each drive one standard TTL load.

EQUAL, ZERO outputs, and the

To permit operation in noisy environments and to prevent
multiple triggering with slowly changing inputs, the count
input is provided with a Schmitt trigger.

Input frequency is guaranteed to 2MHz, although the device will
typically run with f
(EQUAL output) will typically run 750kHz maximum.

as high as 5MHz. Counting and comparing

IN

Ordering Information

PART

NUMBER

ICM7217AIPI -25 to 85 28 Ld PDIP Common Cathode Decade/9999 E28.6

ICM7217CIPl -25 to 85 28 Ld PDIP Common Cathode Timing/5959 E28.6

ICM7217IJI -25 to 85 28 Ld CERDIP Common Anode Decade/9999 F28.6

lCM7217BlJl -25 to 85 28 Ld CERDIP Common Anode Timing/5959 F28.6

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

TEMP. RANGE

(oC) PACKAGE

| Copyright © Intersil Corporation 1999

DISPLAY DRIVER

9-12

TYPE

COUNT OPTION/

MAX COUNT PKG. NO.

File Number 3167.1

Pinouts

ICM7217 (PDIP)

COMMON ANODE

TOP VIEW

ICM7217

ICM7217 (CERDIP)

COMMON CATHODE

TOP VIEW

CARRY/BORROW

BCD I/O 8s
BCD I/O 4s
BCD I/O 2s
BCD I/O 1s

COUNT INPUT

UP/

LOAD REGISTER/

LOAD COUNTER/

EQUAL

STORE

I/O OFF

RESET

ZERO

DOWN

OFF

SCAN

10
11
12
13
14

1
2
3
4
5
6
7
8
9

ICM7217

ICM7217B

Functional Block Diagram

ZERO

V

DD

UP/

DN

COUNT

4

T.G.

4

D1
10

RS
ZERO
U/D

CL CARRY

T.G.

123

D2

123 4

10

ZERO
U/D

CL CARRY

28

D1
D2

27
26

D3

25

D4

24

V

DD

DISPLAY CONT.

23

SEG g

22

SEG b

21
20

V

SS

SEG e

19

SEG f

18

SEG d

17
16

SEG a
SEG c

15

4

4

RS

4

T.G.

4

D3
10

RS
ZERO
U/D

CL CARRY

ZERO
U/D
CL CARRY

CARRY/BORROW

COUNT INPUT

LOAD REGISTER/

LOAD COUNTER/

4

T.G.

4

D4
10

RS

4

4

EQUAL
BCD I/O 8s
BCD I/O 4s
BCD I/O 2s
BCD I/O 1s

STORE

UP/

I/O OFF

ZERO

DOWN

OFF

SCAN

RESET

4

4

1
2
3
4
5
6
7
8

9
10
11
12
13
14

T.G.

D1

REG.

COMP.

4

4

4

ICM7217A
ICM7217C

4

T.G.

4

D2

REG.

4

COMP.

28

SEG
SEG

27

SEG f

26

SEG c

25

V

24

DD

SEG a

23

SEG e

22

SEG g

21
20

DISPLAY CONT.
V

19

SS

D1

18
17

D2

16

D3
D4

15

4

T.G.

4

D3

REG.

4

COMP.

d
b

123

123

4

T.G.

4

D4

REG.

4

COMP.

V

SS

s

8
4s

BDC

2s
1s

I/O

SEGMENT DECODER

SEGMENT DRIVERS

A

(7)

T.G.

4

LATCH

MUX

4

LATCH

DISPLAY BLANK + OFF

DIGIT DRIVERS

GB C D E F

D4 D3 D2 D1

T.G.

4

MUX

4

(4)

T.G.

LATCH

MUX

T.G.

4

4

BCD I/O INPUTS
COM. ANODE: PULL DOWN
COM. CATHODE: PULL UP

4

LATCH

MUX

4

4

DIGIT MUX

L.R.

L.C.

RESET

4

4

CARRY/BARROW

MUX. I/O

AND

DISPLAY

CONTROL

LOGIC

MUX.

OSCILLATOR

4

4

EQUAL

V

DD

V

DD

V

DD

V

SS

V

DD

V

SS

V

DD

V

SS

4

STORE

RESET

LOAD
COUNTER

LOAD
REGISTER

DISPLAY
CONTROL

SCAN

9-13

ICM7217

Absolute Maximum Ratings Thermal Information

Supply Voltage (VDD - VSS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V

Input Voltage (Any Terminal) . . . . . . . .(VSS- 0.3V) to (VDD + 0.3V)

(Note 1)

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. Due to the SCR structure inherent in the CMOS process used to fabricate these devices, connecting any terminal to a voltage greater
than VDD or less than VSS may cause destructive device latchup. For this reason it is recommended that the power supply to the device
be established before any inputs are applied and that in multiple systems the supply to the ICM7217 be turned on first.

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 . . . . . . . . . . . . . . . . 55 14

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

Maximum Junction Temperature

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

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

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

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

Electrical Specifications V

= 5V, VSS = 0V, TA = 25oC, Display Diode Drop 1 .7V, Unless Otherwise Specified

DD

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Supply Current
(Lowest Power Mode), IDD (7217)

Supply Current, OPERATING, I
Supply Current, OPERATING, I
V
Digit Driver Output Current, I

SUPPLY

, V

DD

DIG

SEGment Driver

Display Off, LC, DC, UP/DN,
ST, RS, BCD I/O Floating or at V

Common Anode, Display On, all “8’s” 140 200 - mA

OP

Common Cathode, Display On, all “8’s” 50 100 - mA

OP

(Note 1)

DD

- 350 500 µA

4.5 5 5.5 V
Common Anode, V
Common Anode, V

= VDD - 2.0V 140 200 - mA

OUT

= +1.5V 20 35 - mA

OUT

Output Current, ISEG
Digit Driver, Output Current, I
SEGment Driver

Common Cathode, V

DIG

Common Cathode V

= +1.0V -50 -75 - mA

OUT

= VDD - 2V -9 -12.5 - mA

OUT

Output Current, ISEG
ST, RS, UP/DN Input

VIN = VDD - 2V (Note 1) 5 25 - µA

Pullup Current, IP
3 Level Input Impendance, ZIN 40 - 350 kΩ
BCD I/O Input, High Voltage

VBIH
BCD I/O Input, Low Voltage

VBIL
BCD I/O Input, Pullup Current

IBPU
BCD I/O Input

Pulldown Current, IBPD
BCD I/O,

ZERO, EQUAL Outputs

ICM7217 Common Anode (Note 2) 1.5 - - V
ICM7217 Common Cathode (Note 2) 4.40 - - V
ICM7217 Common Anode (Note 2) - - 0.60 V
ICM7217 Common Cathode (Note 2) - - 3.2V V
ICM7217 Common Cathode V

= VDD - 2V

IN

525-µA

(Note 2)
ICM7217 Common Anode V

= +2V (Note 2) 5 25 - µA

IN

IOH = -100µA 3.5 - - V

Output High Voltage, VOH
BCD I/O, CARRY/BORROW

IOL = 1.6mA - - 0.4 V

ZERO, EQUAL Outputs
Output Low Voltage, V

Count Input Frequency, f

OL

IN

-20oC to 70oC - 5 - MHz
Guaranteed 0 - 2 MHz

Count Input Threshold, VTH (Note 3) - 2 - V
Count Input Hysteresis, VHYS (Note 3) - 0.5 - V
Count Input LO, VCIL - - 0.40 V
Count Input HI, VCIH 3.5 - - V
Display Scan

Oscillator Frequency, f

DS

Free-running (SCAN Terminal Open Circuit) - 2.5 10 kHz

PEAK
PEAK

PEAK
PEAK

9-14

ICM7217

Switching Specifications V

= 5V, VSS = 0V, TA = 25oC

DD

PARAMETER MIN TYP MAX UNIT

UP/DOWN Setup Time, t
UP/DOWN Hold Time, t
COUNT Pulse Width High, t
COUNT Pulse Width Low, t

UCS

UCH

CWH

CWI

COUNT to CARRY/BORROW Delay, t
CARRY/BORROW Pulse Width t
COUNT to EQUAL Delay, t
COUNT to ZERO Delay, t
RESET Pulse Width, t

RST

BW

CE

CZ

CB

300 - - ns

1500 750 - ns

250 100 - ns
250 100 - ns

- 750 - ns

- 100 - ns

- 500 - ns

- 300 - ns

1000 500 - ns

NOTES:

1. In the ICM7217 the UP/DOWN,ST ORE,RESET and the BCD I/O as inputs hav e pullup or pulldown de vices which consume power when
connected to the opposite supply. Under these conditions, with the display off, the device will consume typically 750µA.

2. These voltages are adjusted to allow the use of thumbwheel switches for the ICM7217. Note that a high level is taken as an input logic
zero for ICM7217 common-cathode versions.

3. Parameters not tested (Guaranteed by Design).

Timing Waveforms

SCAN

INTERNAL OSC

OUTPUT

D4

INTERNAL

(BCD AND
SEGMENT

ENABLE)

INTERNAL
(COMMON

ANODE

DIGIT

STROBES)

D3

D2
D1

D4

D3

D2
D1

10µs TYP 400µs TYP

FREE-RUNNING

FREE-RUNNING

INTERDIGIT BLANK

FIGURE 1. MULTIPLEX TIMING

9-15

Timing Waveforms

ICM7217

LOAD COUNTER

(OR LOAD REGISTER)

UP/

DOWN

COUNT INPUT

CARRY/BORROW

EQUAL

ZERO

t

UCS

t

CWH

t

t

t

CB

CEL

CZL

t

UCH

t

BW

FIGURE 2. COUNT AND OUTPUTS TIMING

t

CWL

t

CZH

t

CEH

SCAN

D4

D3

D2

D1

INTERNAL

OPERATING

MODE

BCD I/O

= HIGH IMPEDANCE
= THREE-STATE W/PULLDOWN

OUTPUT

OUT

D

N

INPUT

D4

IN

D3
IN

D2

IN

FIGURE 3. BCD I/O AND LOADING TIMING

COUNT INHIBITED IF
LOAD COUNTER

D1

IN

D4 OUT D3 OUT

9-16

Typical Performance Curves

300

4.5 ≤ VDD ≤ 6V

ICM7217
ICM7217B

200

IDIG (mA)

100

85oC

25oC

-20oC

ICM7217

80

60

40

ISEG (mA)

20

TA= 25oC

V+ = 5.5V

ICM7217
ICM7217B

V+ = 4.5V

V+ = 5V

0

0123

VDD - V

OUT

(V)

0

012 3

FIGURE 4. TYPICAL IDIG vs V+ FIGURE 5. TYPICAL ISEG vs V

80

V+ = 5V

-20oC

ICM7217

60

ICM7217B

40

OUT

25oC

(V)

OUT

ISEG (mA)

20

0

0123

85oC

V

FIGURE 6. TYPICAL ISEG vs V

200

TA= 25oC

200

150

100

IDIGIT (mA)

50

V+ = 5V

ICM7217A
ICM7217C

0

0123

FIGURE 7. TYPICAL IDIGIT vs V

30

4.5 ≤ VDD − VSS≤ 6V

V

OUT

-20oC

85oC

V

OUT

(V)

OUT

25oC

(V)

OUT

-20oC

150

100

IDIGIT (mA)

50

0

0123

FIGURE 8. TYPICAL IDIGIT vs V

V+ = 5.5V

ICM7217A
ICM7217C

V+ = 5V

V

OUT

V+ = 4.5V

(V)

OUT

9-17

25oC

ICM7217A

20

ICM7217C

85oC

ISEG (mA)

10

0

0123

FIGURE 9. TYPICAL ISEG vs VDD - V

VDD - V

OUT

(V)

OUT