sy89537l Micrel Semiconductor, sy89537l Datasheet - Page 5

• Manufacturer Part Number: sy89537l
• Description: Sy89537l 3.3v Precision Lvpecl And Lvds Programmable Multiple Output Bank Clock Synthesizer And Fanout Buffer
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Pin Description
Input/Output
Reference Input Driver Select Table
Output and Frequency Select Tables
December 2007
Pin Number
12, 13
15, 16
34, 35
37, 38
25, 26
28, 29
31, 32
5, 6
8, 9
POUT0, /POUT0
POUT1, /POUT1
POUT2, /POUT2
POUT3, /POUT3
LOUT0, /LOUT0
LOUT1, /LOUT1
LOUT2, /LOUT2
XTAL2, XTAL1
RFCK, /RFCK
(continued)
Pin Name
RSEL1
PSELx
Table 2. PECL Output and Frequency Select Table
Table 3. LVDS Output and Frequency Select Table
LSEL
0
0
1
1
0
0
1
1
Table 1. Reference Input Divider Select Table
0
0
1
1
Pin Function
Reference Clock Differential Input. Input accepts any input, single-ended or differential:
TTL/CMOS, LVPECL, LVDS, HSTL, and SSTL. RFCK requires external termination.
See "Input Interface" section for details.
Crystal Input. Directly connect a series resonant crystal across inputs. See “Quartz
Crystal Oscillator Specification” table. Place crystal as close to the input as possible,
keep XTAL and traces away from adjacent noisy traces to minimize noise coupling, and
place the XTAL on the same side as the SY89537L (component side).
100K LVPECL Output Drivers. Terminate all PECL outputs with 50Ω to V
output pair has respective output frequency control (PSELx, PENx) pins. See "PECL
Output and Frequency Select Table" for proper coding. For low jitter applications, unused
PECL output pairs should be terminated with pull-down resistors. See "Output
Termination Recommendations" section for termination detail.
Differential LVDS Compatible Output Drivers. Output termination is 100Ω across the pair.
For low-jitter applications, unused LVDS output pairs should be terminated with 100Ω
across the pair. See “Output Termination Recommendations” section for details.
RSEL0
PENx
LEN
0
1
0
1
0
1
0
1
0
1
0
1
5
Internal Reference
Disable Output
Disable Output
(VCO/4) / 2
(VCO/4) / 8
(VCO/4) / 1
(VCO/4) / 2
(VCO/4) / 8
(VCO/4) / 1
RFCK / 8
RFCK / 4
RFCK / 2
RFCK / 1
LOUTx
POUTx
Clock
[e-mail]
CCO
M9999-121207-B
or [phone]
-2V. Each
SY89537L