sy89538l Micrel Semiconductor, sy89538l Datasheet - Page 6
![no-image](/images/manufacturer_photos/0/4/435/micrel_semiconductor_sml.jpg)
sy89538l
Manufacturer Part Number
sy89538l
Description
Sy89538l 3.3v Precision Lvpecl And Lvds Programmable Multiple Output Bank Clock
Manufacturer
Micrel Semiconductor
Datasheet
1.SY89538L.pdf
(23 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
sy89538lHY
Manufacturer:
Micrel Inc
Quantity:
135
Company:
Part Number:
sy89538lHY
Manufacturer:
MICREL
Quantity:
655
Pin Description
Input/Output
Input Driver Select Table
Pre-Divider Frequency Select Table
January 2008
Pin Number
54, 61, 64
32, 48,
11, 12
17, 18
20, 21
49, 50
52, 53
38, 39
41, 42
44, 45
3, 4
8, 9
POUT0, /POUT0
POUT1, /POUT1
POUT2, /POUT2
POUT3, /POUT3
LOUT0, /LOUT0
LOUT1, /LOUT1
LOUT2, /LOUT2
XTAL2, XTAL1
RFCK, /RFCK
RSEL1
FBIN, /FBIN
Pin Name
Table 1. Reference Input Divider and Zero-Delay MUX Divider Select Table
0
0
1
1
NC
PDSEL1
0
0
1
1
RSEL0
Pin Function
External Feedback Input used as the zero delay input. Output feeds into the inputs to
configure the device in zero-delay mode, which forces the output frequency to the
same frequency of the RFCK frequency. Requires external termination. See “Zero
Delay FBIN Input” section for more details.
Reference Clock Differential Input. Input accepts any input, single-ended or
differential: TTL/CMOS, LVPECL, LVDS, HSTL, and SSTL. RFCK requires an
external termination. See “Input Interface” and “Input Termination” sections for more
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 SY89538L (component side).
100K LVPECL Output Drivers. Terminate all LVPECL outputs with 50Ω to V
Each output pair has a respective output frequency control (PSELx, PENx, DSEL).
See “LVPECL Output Post-Divider and Frequency Select Table” for proper decoding.
For low-jitter applications, unused LVPECL 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.
No connect.
0
1
0
1
Table 2. Pre-Divider Select Table
PDSEL0
0
1
0
1
Internal Reference
6
RFCK / 8
RFCK / 4
RFCK / 2
RFCK / 1
Clock
Pre-Div-Out Frequency
(VCO/2) / 5
(VCO/2) / 4
(VCO/2) / 3
(VCO/2) / 2
hbwhelp@micrel.com
MUX Divider
Zero-Delay
FBIN / 8
FBIN / 4
FBIN / 2
FBIN / 1
or (408) 955-1690
M9999-010808-E
CCO
–2V.