MMC22925

MMC22926 MICRO-ELECTRONICS | Alldatasheet

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This file has been download from www.datasheetcatalog.com ri Vv, lg "4 7, “\\ WEI GOUSSG) 4) INCETOGLEGHONIEG mmc 22928 /6/9/e tt 4-DIGIT COUNTERS WITH MULTIPLEXED 7-SEGMENT OUTPUT DRIVERS GENERAL DESCRIPTION . The Carry-Out signal goes high at 6000 and goes Theese CMOS counters consist of a 4-counter, an back low at 0000. internal output latch, NPN output sourcing drivers The MMC 22927 is like the MMC 22926 except for a 7-segment display and an internal multiplexing that the secound most significant digit divides by 6 circuitry with four multiplexing outputs. The multi- rather than 10. Thus, if the clock input frequency is plexing circuit has its own free-running oscillator and 10.Hz, the display would read tenths of seconds and Fequires no external clock. The counters advance on minutes (ie. 9:59:9), S negative edge of clock. A high signal on the Reset in- The MMC 22928 is like the MMC 22926 except put will reset the counter to zero and reset the car- that the most Se digit divides by 2 rather ry-out low. A low signal on the Latch Enable input will than 10 and the Carry Out. is an overflow indicator latch the number in the counters into the internal which goes high at 2000, and goes back low only output latches. A high signal on Display Select input when the counter is reset. Thus, this is a 3 1/2-digit will select the number in the counter to be displayed; counter. a low level signal on the Display Select will select the number in the autput latch to be displayed. FEATURES The MMC 22925 is a 4-decade counter and has Latch Enable, Clock and Reset inputs (16 pins @ Supply voltage range 3 VtobBV package). @ Internal multiplexing circuitry The MMC 22926 is like the MMC 22925 except @ High segment sourcing current: 40 mA at Vous = that it has a Display Select and a Carry-Out used for Voo — 1-6 V, Vop = SV cascading counters. @ Guaranteed noise margin 1 V ABSOLUTE MAXIMUM RATINGS nn Vopit Supply voltage -0.3 to 6.5 Vv Vv, Input voltage -0.3 to Vopt03 Vv if OC input current {any one input) +10 mA Prot Total power dissipation Refer toPowax vSTa Graph Ta Operating temperature 0 to 70 Cc Tstg Storae temperature ~40 to 425 c nnn rr RECOMMENDED OPERATING CONDITIONS eee Vopt* Supply voltage 3 to 6 Vv Vv, input voltage ie) to Voo Vv Ta Operating temperature it) to 70 (3 ee eee

7 All voltage voluies are referred to Vg¢ pin voltage

CONNECTION DIAGRAM - MMC 22925 MMC 22925 MMC #22925/6/7/8 C7 , oth 1610 np dfyi 481°} Voo e {2 ssf) «tp Me . +s up» ‘ 4. b= o Us re a u ° 7 . LATCH ENABLE (5 ‘ACCARRY OUT CH MABE s pe Aron ome aes DSPLAY SELECTS 13] RESET tour Cle uf) cock Aor 17 wbaocx tour Cp 194-3 Pou Bour (18 10) Dour ven Ce OP cour vss (9 107) Cour i nn 324

This file has been download from www.datasheetcatalog.com MMCR2925/68/7/8 —_— eee rzezvO FUNCTIONAL DESCRIPTION Reset — Asynchronous, active high Display Select — High, displays output of counter — Low, displays output of latch Latch Enable — High, flow through condition ae _- bow, latch qandtion ~~ Negative edge sensitive Digit Output — Current sourcing with 1 mA, = 1.75 V. Also sink capability = aes - 3 LTTL peas (see cary cut wavelorms) nn) eae et SNL jegm — Current sourcing wit = ~ 1,6 V typical (T, = = 25 C). Also si capability = 2 CPIL Toads, ‘our = Voo pi i Iso sink BLOCK DIAGRAM MMC 22925 MMC 22926 “Taea tt. siege E HH sou =e HH te Fy No. O8 re AE — | OE soa wane Peer. omit mee <1

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pos eH posi Ho: oir} Fy Or ser Ot On aso a0 MMC 22927 MMC 22928 wut ot a: Aa nt Est Ho: ATO g {ss os] 3 | ae do Ot [Pf st [te ee FS a0 tant 5 ° | & £4 Hs: | EEE Hi: ton OLS dor % oP —f aod Sar a09 bec O1 oi ££ pate 0 © STATIC ELECTRICAL CHARACTERISTICS (over recommended operating conditions) : Sn PARAMETER TEST CONDITIONS MIN TYP, MAX UNIT eee CMOS TO CMOS INTERFACE _CMOS TO CMOS INTERFACE “4” = Vv Vi (1) Logical “1” Input Voltage = Vcc = S.OV 3.5 Vin (0) Logical “O" Input Voltage Voc = 5.0V 15 v Vour (1)Logical “1” Output Voltage Voc = 5.0V. Ip = —10pA 45 (Carry-Out and Digit Output Only) ne u Vour (OlLpgical “O” Output Voltage Vcc = 5.0V, lo = 10 vA Meth” Logical "1" Input Current Voc = 5.OV. Vy = 5V 1 oo wh ty (0) Logical “O" Input Current = Voc = 5-OV. Vin = ov mad : lee Supply Current Vec = 5.0V. Outputs Open ey Circuit, Viy = OV of SV 20 1000 4A EU Vi = eee 325

_This fle has been download irom www.datasheetsatslog.com | MMC 22925/6/7/, te, PARAMETER Testconomions MIN. | TYP [Max | UNT OUTPUT DRIVE Vour Output Voltage louy = ~65MA, Veg = 5V. Voo71.3 Vv (Segment Sourcing Output) [T) = 25°C lour = ~40mA, {Tzt90°CVoc~1 6 | Vecr1.2 v Veo = 5V lt =150°CVgc-2 | Veort.4 Vv Ron Output Resistance lour = ~85mA, Veo = SV, 20 i) (Segment Sourcing Output) |T; = 25°C lour = —40mA, (Uae 30 40 } a Voc = 5V (7 =150°C 35 so | 0 Output Resistance (Segment 0.6 OB | %/°C Output) Temperature Coeficient Isounce Output Source Current coc = 4.75V, Vour = 1.75V, -1 -2 mA (Digit Output) j = 150°C Isounce Output Source Current co = BV, Vour = OV 1.75 -3.3 mA (Carry-out) j= esc Isinx - Qutput Sink Current, Veo = 5V, Vour = Veo. 1.75 3.6 mA (All Outputs) j= 25°C . buat Thermal Resistance IMMC 22925 75 100 | °C/W IMMC 22926/7/8 70 90 1 °C/W 36 4, measured in free-air with device-soldered into printed circuit board DYNAMIC ELECTRICAL CHARACTERISTICS T = 28°C, C, = SO pF, unless otherwise specified PARAMETER TEST CONDITIONS | min | tye UNIT fax Maximum Clock Veo = 5.0V T, = 25°C 2 4 MHz Frequency Square Wave ClackT; = 100°C 1.5 3 MHz tht, Maximum Clock Rise | Vop = S.0V 15 us or Fall Time twa Reset Pulse Width =| Voc = 5.0V T, =100°¢ | 320 125 ns twie Latch Enable Pulse Vee = SOV T= 25°C 250 100 ns Width ae T= 100°C | 320 125 ns tgerice.ueflock Latch Enable }\\) 5 ay T)= 25°C | 2500 1250 ns Set-Up Time oa T,= 100°C | 3200 | 1600 ns ta Latch Enable to Von = SOV T= 25°C ie) ~100 ns Reset Wait Time a“ T,= 100°C 0 ~100 ns terme Reset to Latch _ T= 25°C 320 160 ns Enable Set-Up Time | Va = 50V t=100°c | 400 200 ns faux Multiplexing Output | Vp = 5.0V 4000 Hz Frequency Cyn Input Capacitance — | Any Input 5 pF an 326

This file has been download from www.datasheetcatalog.com R MMC 22925/6/7/8 TIMING DIAGRAM Multelesing Output Woveforms ope 1 clock Aour Sem yar ATOH ENABLE *on se TRE Cur | | RESET ‘a wR D out Corry-Out Waveforms “an cock J l | J | J | f | Hcz726 CARRY-QUT. | ‘ONT Bn a MMC 22927 CARRY-OUT | MMC 22928 SAS Ha CARRY-OST. ae 199-0000 TYPICAL PERFORMANCE CHARACTERISTICS

5 Maxtmum Power Diselpatton

= oo PLT TTT tt ee ee oe = 1201 ro ry see fone zeses JT TTT 2 og LETS 5 oo FLT ASA ee eee ee eee sg EERE = 0 2 4 60 80 100 oe” Ta-AMBIENT TEMPERATURE ( °C) eee EE SaaS 327

This file has been download from www.datasheetcatalog.com MMC 22925/6,/ TYPICAL APPLICATION

9 Comman Cathode LED Oisploy Seqnent idstification

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