SY89429A Datasheet | Micrel Semiconductor

Micrel, Inc. PROGRAMMABLE FREQUENCY SYNTHESIZER (25MHz to 400MHz) Precision Edge® Precision ESYd8g9e42®9A SY89429A Features n Improved jitter performance over SY89429 n 25MHz to 400MHz differential PECL outputs n ±25ps peak-to-peak output jitter n Minimal frequency over-shoot n Synthesized architecture n Serial 3 wire interface n Parallel interface for power-on n Internal quartz reference oscillator driven by quartz crystal or PECL source n PECL output can operate with either +3.3V or +5V VCC_OUT power supply n External loop filter optimizes performance/cost n Applications note (AN-06) for ease of design-ins n Available in PLCC and SOIC 28-pin packages PIN CONFIGURATION Precision Edge® DESCRIPTION The SY89429A is a general purpose, synthesized clock source targeting applications that require both serial and parallel interfaces. Its internal VCO will operate over a range of frequencies from 400MHz to 800MHz. The differential PECL output can be configured to be the VCO frequency divided by 2, 4, 8 or 16. With the output configured to divide the VCO frequency by 2, and with a 16MHz external quartz crystal used to provide the reference frequency, the output frequency can be specified in 1MHz steps. VCC_OUT FOUT /FOUT GND VCC (TTL) TEST GND (TTL) S_CLOCK S_DATA S_LOAD VCC_QUIET LOOP_FILTER LOOP_REF XTAL1 25 24 23 22 21 20 19 26 18 27 17 28 16 PLCC TOP VIEW 2 14 3 13 4 12 5 6 7 8 9 10 11 N[1] N[0] M[8] M[7] M[6] M[5] M[4] XTAL2 VCC1 /P_LOAD M[0] M[1] M[2] M[3] APPLICATIONS n Workstations n Advanced munications n High end consumer n High-performance puting n RISC CPU clock n Graphics pixel clock n Test equipment n Other high-performance processor-based applications Precision Edge is a registered trademark of Micrel, Inc. M[0] 1 M[1] 2 M[2] 3 M[3] 4 M[4] 5 M[5] 6 M[6] 7 M[7] 8 M[8] 9 N[0] 10 N[1] 11 GND (TTL) 12 TEST 13 VCC (TTL) 14 SOIC TOP VIEW 28 /P_LOAD 27 VCC1 26 XTAL2 25 XTAL1 24 LOOP_REF 23 LOOP_FILTER 22...