ICM7217AIPI Intersil, ICM7217AIPI Datasheet

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ICM7217AIPI

Manufacturer Part Number
ICM7217AIPI
Description
4 DIGIT UP/DOWN COUNTER 0-9999
Manufacturer
Intersil
Type
4-Digit UP/Down Counterr
Datasheet

Specifications of ICM7217AIPI

Rohs Status
RoHS non-compliant
Count
9999
Frequency
2MHz
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
100mA
Operating Temperature
-25°C ~ 85°C
Package / Case
28-DIP (0.600", 15.24mm)
Other names
ICM7217AIPIIS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ICM7217AIPI
Manufacturer:
INTEL
Quantity:
5 510
July 2001
1-888-INTERSIL or 321-724-7143
Features
• Four Decade, Presettable Up-Down Counter with
• Settable Register with Contents Continuously
• Directly Drives Multiplexed 7 Segment Common
• On-Board Multiplex Scan Oscillator
• Schmitt Trigger On Count Input
• TTL Compatible BCD I/O Port, Carry/Borrow, Equal,
• Display Blank Control for Lower Power Operation;
• All Terminals Fully Protected Against Static Discharge
• Single 5V Supply Operation
Part Number Information
ICM7217AIPI
ICM7217CIPl
ICM7217IJI
lCM7217BlJl
Parallel Zero Detect
Compared to Counter
Anode or Common Cathode LED Displays
and Zero Outputs
Quiescent Power Dissipation <5mW
NUMBER
PART
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
Intersil and Design is a trademark of Intersil Americas Inc.
TEMP. RANGE
-25 to 85
-25 to 85
-25 to 85
-25 to 85
(
o
C)
28 Ld PDIP
28 Ld PDIP
28 Ld CERDIP
28 Ld CERDIP
PACKAGE
1
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, 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 f
(EQUAL output) will typically run 750kHz maximum.
|
Common Cathode
Common Cathode
Common Anode
Common Anode
Copyright © Intersil Americas Inc. 2001
DISPLAY DRIVER
Programmable Up/Down Counter
TYPE
IN
as high as 5MHz. Counting and comparing
ICM7217
COUNT OPTION/
4-Digit LED Display,
MAX COUNT
Decade/9999
Decade/9999
Timing/5959
Timing/5959
File Number
E28.6
E28.6
F28.6
F28.6
PKG. NO.
3167.3

Related parts for ICM7217AIPI

ICM7217AIPI Summary of contents

Page 1

... Display Blank Control for Lower Power Operation; Quiescent Power Dissipation <5mW • All Terminals Fully Protected Against Static Discharge • Single 5V Supply Operation Part Number Information PART TEMP. RANGE o NUMBER ( C) ICM7217AIPI - ICM7217CIPl - ICM7217IJI - lCM7217BlJl - 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 ...

Page 2

Pinouts ICM7217 (CERDIP) COMMON ANODE TOP VIEW CARRY/BORROW 1 ZERO 2 3 EQUAL BCD I BCD I BCD I BCD I ICM7217 ICM7217B COUNT INPUT 8 STORE 9 UP/DOWN 10 LOAD REGISTER/OFF ...

Page 3

Absolute Maximum Ratings Supply Voltage ( ...

Page 4

Electrical Specifications PARAMETER Display Scan Free-running (SCAN Terminal Open Circuit) Oscillator Frequency Switching Specifications PARAMETER UP/DOWN Setup Time, t UCS UP/DOWN Hold Time, t UCH COUNT Pulse Width ...

Page 5

Timing Waveforms SCAN 10µs TYP FREE-RUNNING INTERNAL OSC OUTPUT D4 D3 INTERNAL (BCD AND SEGMENT D2 ENABLE INTERNAL D3 (COMMON ANODE DIGIT D2 STROBES) D1 UP/DOWN COUNT INPUT CARRY/BORROW EQUAL ZERO ICM7217 400µs TYP FREE-RUNNING INTERDIGIT BLANK FIGURE ...

Page 6

Timing Waveforms LOAD COUNTER (OR LOAD REGISTER) SCAN INTERNAL INPUT OPERATING OUTPUT MODE BCD I/O D OUT N = HIGH IMPEDANCE = THREE-STATE W/PULLDOWN Typical Performance Curves 300 4.5 ≤ V ≤ ICM7217 ICM7217B ...

Page 7

Typical Performance Curves -20 C ICM7217 60 ICM7217B OUT FIGURE 6. TYPICAL ISEG vs V 200 5.5V 150 ...

Page 8

Figure 1 shows the multiplex timing. The DISPLAY pin controls the display output using three level logic. The pin is self-biased voltage approximately / ( normal operation. When ...

Page 9

COUNT INPUT signal when UP/DOWN is high decremented when UP/DOWN is low. A Schmitt trigger on the COUNT INPUT provides hysteresis to prevent double triggering on slow rising edges and permits operation in noisy ...

Page 10

CD4069 1N4148 INPUT INPUT INPUT B INPUT A High High High Low Low High Low Low FIGURE 11C. CMOS OPEN DRAIN FIGURE 11. DRIVING 3-LEVEL INPUTS OF ICM7217 DISPLAY CONTROL 50kΩ D DIGIT LINE N ICM7217 ICM7217B FIGURE 12A. COMMON ...

Page 11

LCD DISPLAY ICM7211 SEGMENTS AND BACKPLANE FIGURE 14. LCD DISPLAY INTERFACE (WITH THUMBWHEEL SWITCHES) The lCM7217A and the ICM7217C ...

Page 12

When using the circuit as a programmable divider (÷ with equal outputs) a short time delay (about 1µs) is needed from the EQUAL output to the RESET input to establish a pulse of adequate duration. (See Figure 16). ...

Page 13

... Figure 13 can be used. LCD Display Interface The low-power operation of the ICM7217 makes an LCD interface desirable. The Intersil ICM7211 4-digit, BCD-to-LCD display driver easily interfaces to the ICM7217 as shown in Figure 14. Total system power consumption is less than 5mW. System timing margins can be improved by using capacitance to ground to slow down the BCD lines. The 10kΩ ...

Page 14

It is possible to use separate thumbwheel switches for presetting, but since the devices load data with the oscillator free-running, the multiplexing of the two devices is difficult to synchronize. Precision Frequency Counter/Tachometer The circuit shown in Figure 23 is ...

Page 15

TO D4 STROBE TO D1 STROBE BCD INPUTS OF ICM7217, ICM7217B FIGURE 17. THUMBWHEEL SWITCH/DIODE CONNECTIONS CARRY 1 2 ZERO 4 5 BCD I/O 6 ...

Page 16

10K DIS OUT 0.047µ 0.47µF C INVERTERS: CD40106B COUNT INPUT NANDS: CD4011B 300µs GATE 50µs STORE RESET ...

Page 17

RUN MIN/SEC STOP RUN HRS/MIN ICM7213 30pF (4V MAX 30pF 4.1943MHz CRYSTAL R < 75Ω S THUMBWHEEL SWITCHES 5959 V ELAPSED DD COUNTDOWN V ...

Page 18

COUNT INPUT CARRY OUT BCD OUTPUTS HIGH ORDER DIGITS ICM7217 8 9 UP/DOWN 21, 22 N.O. 14 RESET HIGH ORDER ICM7217 COMMON-ANODE LED DISPLAY CARRY/BORROW 4 DIGITS ...

Page 19

ICM7207A 10kΩ CRYSTAL f = 5.24288MHz R = 75Ω S INPUT FIGURE 23. PRECISION FREQUENCY COUNTER (MHz MAXIMUM) 400mV FULL SCALE INPUT + 0.1µF +5V 1 GND ...

Page 20

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reli- able. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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