9154A

9154A ICST | Alldatasheet

Document overview

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Technical content

Systems, Inc. 9154A 0174E—03/18/08 Low-Cost 16-Pin Frequency Generator The 9154A is a 0.8mm version of the industry leading 9154. Like the 9154, the 9154A is a low-cost frequency generator designed for general purpose PC and disk drive applications. However, because the 9154A uses 0.8mm technology and the latest phase-locked loop architecture, it offers performance advantages that enable the device to be sold into Pentium™ systems. The 9154A guarantees a 45/55 duty cycle over all frequencies. In addition, a worst case jitter of ±250ps is specified at Pentium frequencies. The CPU clock offers the unique feature of smooth, glitch- free transitions from one frequency to the next, making this the ideal device to use when slowing the CPU speed. The 9154A makes a gradual transition between frequencies so that it obeys the Intel cycle-to-cycle timing specifications for 486 and Pentium systems. The 9154A -42 and 9154A -43 devices offer features specifically for green PCs. The 9154A-42 and -43 have a single pin that, when pulled low, will smoothly slow the 2XCPU clock to 8 MHz. This is ideal for dynamic DX microprocessors. The 9154A-43 not only has the slow clock feature, but also offers a glitch-free stop clock for static SX microprocessors. The STOPCLK# pin, when pulled low, enables the 2XCPU clock to go low only after completing its last full cycle. The clock continues to run internally, and will be output again on the first full cycle immediately following stop clock disable. The simultaneous 2X and 1X CPU clocks offer controlled skew to within 500ps of each other (-42 only). ICS has been shipping motherboard frequency generators since April 1990, and is the leader in the area of multiple output clocks on a single chip. Consult ICS for all your clock generation needs.  Compatible with 386, 486 and Pentium CPUs  45/55 Duty cycle  Runs up to 66 MHz at 3.3V  Single pin can slow clock to 8 MHz (on -42 and -43)  Single pin can stop the CPU clock glitch-free (on -43)  Very low jitter, ±250ps for Pentium frequencies  1X and 2X CPU clocks skew controlled to ±250ps (-42 only)  Smooth transitions between all CPU frequencies  Slow frequency ramp at power-on avoids CPU lock-up  16-pin 150-mil skinny SOIC packages  0.8 µm CMOS technology

Applications

Computer motherboards: The 9154A replaces crystals and oscillators, saving board space, component cost, part count and inventory costs. It produces a switchable CPU clock and up to four fixed clocks to drive floppy disk, communications, super I/O, Bus, and/or keyboard devices. The small package and 3.3V operation is perfect for handheld computers. FeaturesGeneral Description Block Diagram

Systems, Inc. 9154A 0174E—03/18/08 Pin Configuration 16-SOIC 9154A-27CS16 16-SOIC 9154A-42CS16 16-SOIC 9154A-43CS16 Description of new pin: SLOWCLK# forces 2XCPUCLK output to ramp smoothly to 8MHz and CPUCLK output to 4 MHz when pulled low. Description of new pis: SLOWCLK# forces 2XCPUCLK output to ramp smoothly to 8MHz when pulled low. STOPCLK# provides gilitch-free stop of the 2XCPUCLK output when pulled low. When raised back high, the 2XCPUCLK output clock resumes full speed operation (no clock frequency ramp up since the internal VCO is not stopped). 16-SOIC 9154A-04CS16 16-SOIC 9154A-10CS16 16-SOIC 9154A-26CS16 OBSOLETE

Systems, Inc. 9154A 0174E—03/18/08 Stop Clock Feature The 9154A-43 incorporates a unique stop clock feature compatible with static logic processors. When the stop clock pin goes low, the 2XCPUCLK will go low after the next occurring falling edge. When STOPCLK again goes high, 2XCPUCLK resumes on the next rising edge of the internal clock. This feature enables fast, glitch-free starts and stops of the 2XCPUCLK and is guaranteed that the CPU does not receive any short period clocks. 2XCPUCLK STOPCLK#

Systems, Inc. 9154A 0174E—03/18/08 Pin Descriptions Frequencies based upon 14.318 MHz input) Note: Internal Pull-up Resistors. * -04 and -10 have no pull-ups or frequency select pins ** -10 has no pull-up or Pin 9 PDFCLK 444444 V D D P D i g i t a l p o w e r ( 3 . 3 o r 5 V ) . 13 13 13 13 13 13 VDD P Digital power (3.3 or 5V). 555555 G N D P D i g i t a l g r o u n d . 12 12 12 12 12 12 GDD P Digital ground. 888888 A G N D P A n a l o g g r o u n d . 11 611 61 1 F S 0 I Frequency select 0 for CPU clock (has internal pull-up).* 16 15 16 15 16 16 FS1 I Frequency select 1 for CPU clock (has internal pull-up).* 10 - 10 10 9 10 FS2 I Frequency select 2 for CPU clock (has internal pull-up).* - - 9 9 - - OE I Tristates outputs when low (has internal pull-up).* ---- 1 5 1 5 S L O W C L K # I Slows 2XCPU clock to 8 MHz (active low) (has internal pull-up). ----- 9 S T O P C L K #I Stops 2XCPU clock glitch-free (active low) (has internal pull-up). 333333 X 1 I C r y s t a l I n . 222222 X 2 O C r y s t a l O u t . 11 10 11 11 10 11 14.318 MHz O 14.318 MHz reference clock output. - 7 1 - - 1.84 MHz O 1.84 MHz (comm) clock output. 6 1 1 6666 2 4 M H z O 2 4 M H z ( f l o p p y d i s k ) c l o c k o u t p u t . - 6 - - - - 16 MHz O 16 MHz clock output. - - 7 7 - - 12 MHz O 12 MHz keyboard clock output. 7 1 - - 7 7 8 MHz O 8 MHz keyboard clock output. 14 14 14 - 11 - CPUCLK O CPU clock output. 15 - 15 14 14 14 2XCPUCLK O 2X CPU clock output. 9----- P D # I P o w e r - D o w n A l l ( a c t i v e l o w ) ( h a s i n t e r n a l p u l l - u p ) . - 9 - - - - PDFCLK# I Power-Down Fixed Clock (1.84, 8, 16, 24) (active low).* PIN NUMBER PIN NAME TYPE DESCRIPTION

Systems, Inc. 9154A 0174E—03/18/08 Fixed Clock Output Actual Frequencies (using 14.318 MHz input, all frequencies in MHz) 14.318 1.84 24.0 12.0 8.0 -10 2XCPU CPU CPUCLK 0 100* 50* PDCPU 18 0 * 4 0 *4 0 2 66.6 33.3 50 35 0 2 5 6 6 . 6 44 0 2 0 - 53 2 1 6 - 62 4 1 2 - 71 6 8 - Clock Tables in MHz for -04 and -10 (using 14.318 MHz input, all frequencies in MHz) -04 FS(3:0) FS(2:0) 2XCPU (MHz) CPUCLK (MHz) 0 100.23* 50.11 1 80.18* 40.09 2 66.48* 33.24 3 50.11 25.06 4 40.09 20.05 5 32.22 16.11 6 24.23 12.12 7 15.75 7.88 Clock Table for 9154A-26 (using 14.318 MHz input, all frequencies in MHz) -43 2XCPUCLK 2XCPUCLK CPUCLK ^ 0 0 0 75* 16 8 16 0 0 1 32 40 20 40 0 1 0 60 33.33 16.67 33.33 0 1 1 40 25 12.5 25 1 0 0 50 60 30 60 1 0 1 66.66 20 10 20 1 1 0 80* 66.66 33.33 66.66 1 1 1 52 50 25 50 -43 2XCPUCLK CPUCLK 2XCPUCLK 0 0 0 75.17* 16.00 8.00 16.00 0 0 1 31.94 40.09 20.05 40.09 0 1 0 60.14 33.41 16.71 33.41 0 1 1 40.09 25.06 12.55 25.06 1 0 0 50.11 60.14 30.07 60.14 1 0 1 66.48 20.05 10.03 20.05 1 1 0 80.18* 66.48 33.24 66.48 1 1 1 51.90 50.11 25.06 50.11 Actual Frequencies (using 14.318 MHz input, all frequencies in MHz) FS2 FS1 FS0 -27 2XCPUCLK -42 -42 Clock Tables (using 14.318 MHz input, all frequencies in MHz) FS2 FS1 FS0 -27 2XCPUCLK

Systems, Inc. 9154A 0174E—03/18/08 Absolute Maximum Ratings Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stess specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. V DD = 3.3 V ± 10%, TA = 0 - 70 oC unless otherwise stated Electrical Characteristics at 3.3 V Notes: 1. Parameter is guaranteed by design and characterization. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Input Low Voltage VIL - - 0.2 VDD V Input High Voltage VIH 0.7 V - - V Input Low Current IIL VIN = 0V (pull-up pin) - 2.5 7 A Input High Current IIH VIN = VDD -5 - 5 A Output Low Voltage VOL IOL = 6mA - 0.05 VDD 0.1 VDD V Output High Voltage1 VOH IOH = -4mA 0.85 VDD 0.94 VDD - V Output Low Current1 IOL VOL = 0.2VDD 15 24 - mA Output High Current1 IOH VOH = 0.7VDD - -13 -8 mA Supply Current IDD unloaded, 60 MHz - 16 34 mA Output Frequency Change over Supply and Temperature1 FD With respect to typical frequency - 0.002 0.01 % Short circuit current1 ISC each output clock 20 30 - mA Input Capacitance1 CI except X1, X2 - - 10 pF Load Capacitance1 CL pins X1, X2 - 20 - pF Pull-up Resistor1 Rpu at VDD - 0.5V - 620 900 k ohm DC Characteris tics

Systems, Inc. 9154A 0174E—03/18/08 Electrical Characteristics at 3.3 V VDD = 3.3 V ± 10%, TA = 0 - 70 oC unless otherwise stated Notes: 1. Parameter is guaranteed by design and characterization. Not subject to production testing. scitsiretcarahCCA RETEMARAPL OBMYSS NOITIDNOCTSETN IMP YTX AMS TINU esiRkcolCtupnI emiT 1 t rCI --0 2s n llaFkcolCtupnI emiT 1 t fCI --0 2s n ot%02,emitesiR V%08 DD 1 tr daolFp51- 2 .25 .3s n ot%08,emitllaF V%02 DD 1 tf daolFp51- 2 .15 .2s n %05taelcycytuD V DD 1 dt daolFp510 6/042 5/840 4/06% ecnerefer,elcycytuD skcolc 1 dt daolFp515 6/057 5/340 5/56% -02,amgiseno,rettiJ skcolczHM66 1 t s1j selcyc000,01- 0 010 02s p ,amgiseno,rettiJ 02wolebskcolc zHM 1 t slj selcyc000,01- 0 .10 .2% 66-02,etulosba,rettiJ skcolczHM 1 t baj selcyc000,010 53-- 0 53s p ,etulosba,rettiJ 02wolebskcolc zHM 1 t baj selcyc000,01- 5 .10 .4% ycneuqerFtupnI 1 f ni 28 13.412 3z HM tuptuOmumixaM ycneuqerF 1 f tuo 07- - z HM neewtebwekskcolC UPCX2dnaUPC stuptuo 1 T ks 24-A4519- 0 220 05s p emiTpu-rewoP 1 t OPt zHM05otffo- 6 2 1s m noitisnarTycneuqerF emiT 1 t tf zHM05ot8morf- 5 .40 1s m

Systems, Inc. 9154A 0174E—03/18/08 scitsiretcarahCCD RETEMARAPL OBMYSS NOITIDNOCTSETN IMP YTX AMS TINU egatloVwoLtupnIV LI V DD V5=- - 8 .0V egatloVhgiHtupnIV HI V DD V5=0 .2- - V tnerruCwoLtupnII LI V NI )nippu-llup(V0=- 6 5 1A tnerruChgiHtupnII HI V NI V= DD 5-- 5 A egatloVwoLtuptuOV LO I LO Am01=- 5 1.04 .0V egatloVhgiHtuptuO 1 V HO I HO Am03-=4 .27 .3- V tnerruCwoLtuptuO 1 I LO V LO V8.0=5 25 4- A m tnerruChgiHtuptuO 1 I HO V HO V4.2=- 3 5-5 3-A m tnerruCylppuSI DD zHM66,dedaolnu- 5 20 5A m ycneuqerFtuptuO ylppuSrevoegnahC erutarepmeTdna 1 FD ottcepserhtiw ycneuqerflacipyt -2 00.01 0.0% tnerructiucrictrohS 1 I CS kcolctuptuohcae5 20 4- A m ecnaticapaCtupnI 1 CI 2X,1Xtpecxe- - 0 1F p ecnaticapaCdaoL 1 CL 2X,1Xsnip- 0 2-F p rotsiseRpu-lluP 1 R up V+A DD V1-- 0 040 07m hok Electrical Characteristics at 5.0 V Notes: 1. Parameter is guaranteed by design and characterization. Not subject to production testing. VDD = +5 ± 10% V, TA = 0 - 70oC unless otherwise stated

Systems, Inc. 9154A 0174E—03/18/08 Electrical Characteristics at 5.0 V VDD = +5 ±10% V, TA = 0 - 70oC unless otherwise stated scitsiretcarahCCA RETEMARAPL OBMYSS NOITIDNOCTSETN IMP YTX AMS TINU esiRkcolCtupnI emiT 1 t rCI --0 2s n llaFkcolCtupnI emiT 1 t fCI --0 2s n 8.0,emitesiRtuptuO V0.2ot 1 tr daolFp51- 5 .12 s n ot%02,emitesiR V%08 1 tr daolFp51- 0 .23 s n 0.2,emitllaFtuptuO V8.0ot 1 tf daolFp51- 5 .05 .1s n ot%08,emitllaF V%02 1 tf daolFp51- 0 .20 .3s n V4.1taelcycytuD 1 dt V,daolFp51 DD = %5±V5 55/542 5/845 4/55% ecnerefer,elcycytuD skcolc 1 dt daolFp515 6/047 5/340 4/56% 02,amgiseno,rettiJ skcolczHM08-zHM 1 t s1j selcyc000,01- 0 70 41s p ,amgiseno,rettiJ 02wolebskcolc zHM 1 t slj selcyc000,01- 8 .00 .2% 02,etulosba,rettiJ skcolczHM08-zHM 1 t baj selcyc000,010 52-- 0 52s p ,etulosba,rettiJ 02wolebskcolc zHM 1 t baj selcyc000,01- 0 .10 .3% ycneuqerFtupnIf ni 28 13.412 3z HM tuptuOmumixaM ycneuqerF 1 f tuo 041- -z HM neewtebwekskcolC UPCX2dnaUPC stuptuo 1 T ks 24-A4519- 0 410 04s p emiTpu-rewoP 1 t OPt zHM08ot- 8 5 1s m noitisnarTycneuqerF emiT 1 t tf zHM66.66ot8morf- 5 .62 1s m Notes: 1. Parameter is guaranteed by design and characterization. Not subject to production testing.

Systems, Inc. 9154A 0174E—03/18/08 0.390 0.031 0.024 0.016 0.050 0.063 0.006±0.004 0.238 0.154 0.008 0.015 0.025 16-Pin SOIC Package

Ordering Information

Example: Lead Free, RoHS Compliant (Optional) Lead Count Package Type S = SOIC Pattern Number (2 digit number for parts with ROM-code patterns) Device Type 9154A - PPC S 16 LF 9154A-43CS16

Systems, Inc. 9154A 0174E—03/18/08

Revision History

Rev. Issue Date Description Page # C 4/6/2006 Added LF Orderin g Information 10 D 1/24/2008 Removed DIP Orderin g Information. - E 3/18/2008 Removed reference to "AV". -