ICM7225IPL ,4 Digit Counter/Decoder/DriverGeneral Description
The Maxim lCM7224(LCD) and |CM7225(LED) are
high speed 4/ digit counters, f ..
ICM7225IPL ,4 Digit Counter/Decoder/DriverApplications
. On-Board Oscillator to Provide Backplane
Frequency (ICM7224)
t Brightness Con ..
ICM7226AIJL , TIMERS COUNTERS AND DISPLAY DRIVERS
ICM7226AIJL , TIMERS COUNTERS AND DISPLAY DRIVERS
ICM7227AIPI , TIMERS COUNTERS AND DISPLAY DRIVERS
ICM7228AIBI ,8-Digit, Microprocessor- Compatible, LED Display Decoder DriverICM72288-Digit, Microprocessor-August 1997 Compatible, LED Display Decoder Driver
IDT74FCT163244CPV , 3.3V CMOS 16-BIT BUFFER/LINE DRIVER
IDT74FCT163244PF , 3.3V CMOS 16-BIT BUFFER/LINE DRIVER
IDT74FCT163244PV , 3.3V CMOS 16-BIT BUFFER/LINE DRIVER
IDT74FCT163245APA , 3.3V CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS
IDT74FCT163245APV , 3.3V CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS
IDT74FCT163245PA , 3.3V CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS
ICM7225IPL
4 Digit Counter/Decoder/Driver
2AlALilDtLAMl
4yi, Digit Counter/Decoder/Driver
General Description
The Maxim lCM7224(LGD) and IGM7225(LED) are
high speed 4'/2 digit counters, featuring segment
decoders, leading zero blanking, store and reset inputs,
and a carry output that allows cascading of 8 or more
digits. The ICM7224 directly drives a non-multiplexed
liquid crystal display(LCD). The ICM7225 has 29 con-
stant current outputs for driving a non-multiplexed
common anode LED display.
These counters operate with inputs from DC to 25MHz
while using only 10pA of supply current. A Schmitt
trigger on the count inputensures reliable operation in
noisy environments and in applications with slowly
varying inputs.
The ICM7224 and ICM7225 are available in a 44 lead
plastic chip carrier package in addition to the standard
40 lead plastic DIP.
Applications
Unit Counter
Freq uency Counter
Tachometer
Hour Meter
Totalizer
._____ Pin Configuration
Top View
ll' [I . V 40 tll
fl LE ’19] Cl
m I: E 81
Fl ii BI] Al
'[BRT] " cr IE OSCILLATOR (tlllill'
M [E E GND
B CE: 31] STORE
C [I E RESET
D LE lVI/le/Vl E ctmT1
E2 ' iCM7224 Til cuum INHIBIT
il E (ICM7225) E LN OUT
F2 [E E L28 IN
A3 [E E CARRY
83 LE 1] ”z-DIGIT
C3 [E IN F4
il3 E E] M
E3 CLF,' E E4
(i3 ca M
F3 [E E] M
M E 21 M
pm ICM7224 ICM7225
a FUNCTION FUNCTION
Hm .mv ~ Buurvvwe
tr, " 'tul ii Car mu;
See Last Page for 44 Lead Chip Carrier Pin Configuration.
Features
' Improved 2nd Source! (See 3rd page tor "Maxim
Advantage"'").
High Speed Up Counter: 25MHz Typ.
Leading Zero Blanking
Can Be Cascaded for 8 or More Digits
STORE and RESET Inputs for Frequency
Counter Applications
. On-Board Oscillator to Provide Backplane
Frequency (ICM7224)
. Brightness Control Input (ICM7225)
. Low Power CMOS
- Ordering Informa tion
PART TEMP. RANGE PACKAGE
ICM7224IPL -2o°c to +85''C 40 Lead Plastic o/r,
ICM7224CQ 0°C to 470° C 44 Lead Plastic Chip Carrier
ICM7224C/D (PC) to -70''C Dice -
|W7225IPL -20°c to 43530 40 Lead Plastic DIP
WNZZSCQ J' C to '70°C 44 Lead Plastic Chip Carrier
lCM7225C/D 0°C to *70°c Dice -
- - Typical Operating Circuit
- - - nu
HI! t H: j
tra Li u. Cl cfnssn
--ul00lli
CUMMDMNDDE Arl/Jxl/VI W
LEI] DISPLAY iCM7225 ICulmll
INHIBIT
[CLOSED]
Unit Counter
The "Maxim Advanrage"" sigrrifies an upgraded quality level. At no addmana/ cast we offer a second-source dewce that IS sumac! to the follmwng:
guaranteed performance over temperature along " tighter testspecihcations on many keyparamistors, anddewce enhancements, when needed that result
in improved performance without changing [he functionality
IVI/J XI/VI
Maxlm Integrated Products 1
9331/ #7331 WC!
[CM 7224/ 7225
41/2 Digit Counter/Decoder/Driver
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ........................................ 6.5V Operating Temperature Range
Input Voltage (any terminal, Note 1) ......... -0.3V to V+ 10.3V Plastic Package (IPL) ..................... -20e'C to r85''C
Power Dissipation Plastic Chip Carrier (Quad) Package (0) ..... 0°C to +70°C
40 Lead Plastic Dip ................................... 1W Storage Temperature Range ............... -65°C to 460°C
(derate 10mW/"C above 25°C.) Lead Temperature (Soldering. 10 sec.) ................ '3t)0'C
44 Lead Plastic Chip Carrier ......................... 1W
(derate 10mW/°C above 25°C.
Note 1:
The input voltage may exceed this rating if the input current is limited to 1mA.
Connecting any terminal to a voltage greater than Ve
or less than Ground and exceeding 1mA Input current may activate the
parasmc SCR inherent in the junction isolated CMOS process, causing destructive deVlCe Iatchup. For this reason, it is
recommended that no inputs from sources operating on a different power supply be applied to the device before its supply is
established, and that in multiple supply systems, the supply to the ICM7224/25 be turned on first.
Stresses above those listed under "Abstgute Maximum Ratings" may cause parmanen! damage to the dswca These are stress ratings only and Iunctiona/
operation of the dswca at mess 0/ any other conditions above those Indicated 'n the operational sections of the specifications Is not Implied. Exposure to
absolute maximum rating conditions for extended penods may affect devise reliabI/IIy
ELECTRICAL CHARACTERISTICS
(All parameters measured with V‘
ICM7224 CHARACTERISTICS
= 5V, unless otherwise Indicated)
PARAMETER SVMBOL CONDITIONS MIN TYP l MAX
Operating current lop Test circuit. Display blank 10 50
Operating supply voltage range I V 3 b 6
r>SCILLATOR input current logm Pm 36 :2 10
I Segment rise/iall tIme 1 trts 1 Coao - 200pF F 0 5
Backplane rise/fall time I trite Cioad = 5000pF a " 15
Oscrllator frequency toss Pin 36 Floating J ' 19
Backplane frequency fsw Pin 36 Floating 150
|CM7225 CHARACTERISTICS
, - PARAMETER I SYMBOL _ - ENDITIONS 171nm l TYP iiax UNITS
I _ Iopo . Pm 5 (BRighTness) at GROUND
Operating current display oft L Pin 29, 31-34 at V’ I 10 50 PA
Operating supply voltage range I v' 4 5 6 I V
Operating current lop Pin 5 at V .Display 18888 200 mA
}Segment leakage current ISLK Segment Off +0.01 1 IA
Segment on current ISEG Segment On, Vout a r3)/ 5 , 8 A
F i - - g m
[@1103 th,~i IN I Half-digit On, Vogv - 10 16 ,
FAMILY CHARACTERISTICS
,,i, V_fi ---r" - a _ I
I PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 1
Input PulI-up Currents Ip Pins 29, 31 33, 34 10 uA
' - -- Vout-- V - 3V 1 3 i .
Input High Voltage v.” Pin 29 31, 33, 34 I 3 _
Input Low Voltage vu PIn 29 31 33, 1 " v 1
COUNT Input Threshold Vcr 2 . _
"Sc-yu-r-OT Input Hysteresis VCH t 0 5
i CARRY Pin 28 I
Output High lor, Leading Zero Blanking OUT Pm 30 350 500
Current 1
Voul - V -3V _
CARRY P 28 HA ;
gu’pu‘ Low los Leading Zero Blanking OUT Pin 30 350 500 _
Vou, - '3V l
- " - '
Count Frequency 1mm. _ 45v rr. v' "l, 6V 0 DC-25 15 MHz l
STORE, RESET Mlnlmum t t 3 s
Pulse Width s, R L__ M
The electrical cltarircterts0cs above are a leproducllon ofa portion of InterSIl's copyrrghted'_1983 1984) data book The; Information does not constitute any
representation by Maxtm that Intersil’s products Mil perform In accordance With these specmcanons, The "Electrical Cnaractenstics Taoie' along mth
rtescrlprwe excerpts from the original manutacfurtrr's data sheet have been Included In this data sheet solely m, comparative purposes,
All]! XI/VI
