SY89429A_09 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – PROGRAMMABLE FREQUENCY SYNTHESIZER (25MHz to 400MHz)

Micrel, Inc.
PROGRAMMABLE
FREQUENCY SYNTHESIZER
(25MHz to 400MHz)
Precision Edge^®
Precision E^SYd⁸g⁹e^42®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.
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
1
PLCC
TOP VIEW
15
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]
APPLICATIONS
n Workstations
n Advanced communications
n High end consumer
n High-performance computing
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.
1
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 VCC_QUIET
21 S_LOAD
20 S_DATA
19 S_CLOCK
18 VCC_OUT
17 FOUT
16 /FOUT
15 GND
Rev.: K
Amendment: /0
Issue Date: July 2009