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Intersil Electronic Components Datasheet

ICM7217 Datasheet

4-Digit LED Display / Programmable Up/Down Counter

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ICM7217 pdf
ICM7217
August 1997
4-Digit LED Display,
Programmable Up/Down Counter
Features
Description
• 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
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, EQUAL, ZERO outputs, and the
BCD port will each drive one standard TTL load.
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 fIN as high as 5MHz. Counting and comparing
(EQUAL output) will typically run 750kHz maximum.
Ordering Information
PART
NUMBER
TEMP. RANGE
(oC)
ICM7217AIPI
ICM7217CIPl
-25 to 85
-25 to 85
ICM7217IJI
lCM7217BlJl
-25 to 85
-25 to 85
PACKAGE
28 Ld PDIP
28 Ld PDIP
28 Ld CERDIP
28 Ld CERDIP
DISPLAY DRIVER
TYPE
Common Cathode
Common Cathode
Common Anode
Common Anode
COUNT OPTION/
MAX COUNT
Decade/9999
Timing/5959
Decade/9999
Timing/5959
PKG. NO.
E28.6
E28.6
F28.6
F28.6
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
9-12
File Number 3167.1



Intersil Electronic Components Datasheet

ICM7217 Datasheet

4-Digit LED Display / Programmable Up/Down Counter

No Preview Available !

ICM7217 pdf
ICM7217
Pinouts
ICM7217 (PDIP)
COMMON ANODE
TOP VIEW
CARRY/BORROW 1
ZERO 2
EQUAL 3
BCD I/O 8s 4
BCD I/O 4s 5
BCD I/O 2s 6
BCD I/O 1s 7
COUNT INPUT 8
STORE 9
UP/DOWN 10
LOAD REGISTER/OFF 11
LOAD COUNTER/I/O OFF 12
SCAN 13
RESET 14
ICM7217
ICM7217B
28 D1
27 D2
26 D3
25 D4
24 VDD
23 DISPLAY CONT.
22 SEG g
21 SEG b
20 VSS
19 SEG e
18 SEG f
17 SEG d
16 SEG a
15 SEG c
ICM7217 (CERDIP)
COMMON CATHODE
TOP VIEW
CARRY/BORROW 1
ZERO 2
EQUAL 3
BCD I/O 8s 4
BCD I/O 4s 5
BCD I/O 2s 6
BCD I/O 1s 7
COUNT INPUT 8
STORE 9
UP/DOWN 10
LOAD REGISTER/OFF 11
LOAD COUNTER/I/O OFF 12
SCAN 13
RESET 14
ICM7217A
ICM7217C
28 SEG d
27 SEG b
26 SEG f
25 SEG c
24 VDD
23 SEG a
22 SEG e
21 SEG g
20 DISPLAY CONT.
19 VSS
18 D1
17 D2
16 D3
15 D4
Functional Block Diagram
ZERO
VDD
UP/DN
COUNT
VSS
4 4 44
T.G. T.G. T.G. T.G.
123
4 4 44
D1
10
RS
ZERO
U/D
CL CARRY
D2
1 10
RS
ZERO
U/D
CL CARRY
D3
2 10
RS
ZERO
U/D
CL CARRY
D4
3 10
RS
ZERO
U/D
CL CARRY
4
4
4
4
4 T.G.
4
4
3 T.G.
4
4
2 T.G.
4
4
1 T.G.
4
4 D1 3 D2 2 D3 1 D4
REG.
REG.
REG.
REG.
4
COMP.
4
COMP.
4
COMP.
4
COMP.
4444
CARRY/BARROW
8s
4s BDC
2s I/O
1s
T.G.
4
LATCH
MUX
4
T.G.
4
LATCH
MUX
4
T.G.
4
LATCH
MUX
4
T.G.
4
LATCH
MUX
4
L.R.
L.C.
RESET
MUX. I/O
AND
DISPLAY
CONTROL
LOGIC
SEGMENT DECODER
DISPLAY BLANK + OFF
SEGMENT DRIVERS
(7)
DIGIT DRIVERS
(4)
ABCDE FG
D4 D3 D2 D1
44
DIGIT MUX
BCD I/O INPUTS
COM. ANODE: PULL DOWN
COM. CATHODE: PULL UP
MUX.
OSCILLATOR
EQUAL
VDD
STORE
VDD
RESET
VDD
LOAD
VSS COUNTER
VDD
LOAD
VSS REGISTER
VDD
VSS
DISPLAY
CONTROL
SCAN
9-13



Intersil Electronic Components Datasheet

ICM7217 Datasheet

4-Digit LED Display / Programmable Up/Down Counter

No Preview Available !

ICM7217 pdf
ICM7217
Absolute Maximum Ratings
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
Thermal Information
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
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.
Electrical Specifications VDD = 5V, VSS = 0V, TA = 25oC, Display Diode Drop 1 .7V, Unless Otherwise Specified
PARAMETER
TEST CONDITIONS
MIN TYP MAX
Supply Current
Display Off, LC, DC, UP/DN,
(Lowest Power Mode), IDD (7217) ST, RS, BCD I/O Floating or at VDD (Note 1)
-
350 500
Supply Current, OPERATING, IOP Common Anode, Display On, all “8’s”
140 200
-
Supply Current, OPERATING, IOP Common Cathode, Display On, all “8’s”
50 100
-
VSUPPLY, VDD
4.5 5 5.5
Digit Driver Output Current, IDIG Common Anode, VOUT = VDD - 2.0V
140 200
-
SEGment Driver
Output Current, ISEG
Common Anode, VOUT = +1.5V
20 35
-
Digit Driver, Output Current, IDIG
SEGment Driver
Output Current, ISEG
Common Cathode, VOUT = +1.0V
Common Cathode VOUT = VDD - 2V
-50 -75
-9 -12.5
-
-
ST, RS, UP/DN Input
Pullup Current, IP
VIN = VDD - 2V (Note 1)
5 25 -
3 Level Input Impendance, ZIN
40 - 350
BCD I/O Input, High Voltage
VBIH
ICM7217 Common Anode (Note 2)
ICM7217 Common Cathode (Note 2)
1.5 -
4.40 -
-
-
BCD I/O Input, Low Voltage
VBIL
ICM7217 Common Anode (Note 2)
ICM7217 Common Cathode (Note 2)
- - 0.60
- - 3.2V
BCD I/O Input, Pullup Current
ICM7217 Common Cathode VIN = VDD - 2V
5
25
-
IBPU
(Note 2)
BCD I/O Input
Pulldown Current, IBPD
ICM7217 Common Anode VIN = +2V (Note 2)
5
25
-
BCD I/O, ZERO, EQUAL Outputs IOH = -100µA
Output High Voltage, VOH
3.5 -
-
BCD I/O, CARRY/BORROW
ZERO, EQUAL Outputs
Output Low Voltage, VOL
Count Input Frequency, fIN
IOL = 1.6mA
-20oC to 70oC
Guaranteed
- - 0.4
-5-
0-2
Count Input Threshold, VTH
(Note 3)
-2-
Count Input Hysteresis, VHYS
(Note 3)
- 0.5 -
Count Input LO, VCIL
- - 0.40
Count Input HI, VCIH
3.5 -
-
Display Scan
Oscillator Frequency, fDS
Free-running (SCAN Terminal Open Circuit)
-
2.5 10
UNIT
µA
mA
mA
V
mAPEAK
mAPEAK
mAPEAK
mAPEAK
µA
k
V
V
V
V
µA
µA
V
V
MHz
MHz
V
V
V
V
kHz
9-14




Part Number ICM7217
Description 4-Digit LED Display / Programmable Up/Down Counter
Maker Intersil
Total Page 19 Pages
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