hbwhelp@micrel.com or (408) 955-1690 5 Pin Descriptio" />
參數(shù)資料
型號: SY89538LHZ
廠商: Micrel Inc
文件頁數(shù): 19/23頁
文件大?。?/td> 0K
描述: IC SYNTHESIZR LVPECL/LVDS 64TQFP
標(biāo)準(zhǔn)包裝: 160
系列: Precision Edge®
類型: 時鐘合成器/扇出緩沖器
PLL:
輸入: CMOS,HSTL,LVDS,LVPECL,LVTTL,SSTL,晶體
輸出: LVDS,LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 3:7
差分 - 輸入:輸出: 是/是
頻率 - 最大: 756MHz
除法器/乘法器: 是/無
電源電壓: 2.375 V ~ 3.6 V
工作溫度: 0°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 64-EP-TQFP
包裝: 托盤
Micrel, Inc.
SY89538L
January 2008
M9999-010808-E
hbwhelp@micrel.com or (408) 955-1690
5
Pin Description
Control and Configuration
(continued)
Pin Number
Pin Name
Pin Function
24
26
58
60
PEN0
PEN1
PEN2
PEN3
TTL/CMOS input enable pin. Used to control the PECL POUT0-POUT3 outputs and
as a frequency select pins. PENx, PSELx, and DSEL are used together; see the
“LVPECL Output Post-Divider and Frequency Select Table” for proper decoding.
PENx contains internal 25k pull-up. When disabled, PECL0-PECL3 outputs are a
logic LOW. The threshold voltage VTH = VCC/2.
46
SYNC
TTL/CMOS Output Bank Synchronization Control. Internal 25k pull-up. The default
state is HIGH. After any bank has been programmed, all PECL and LVDS outputs are
synchronized when the SYNC control pin is toggled with a HIGH-LOW-HIGH
transition. See “Synchronization” section for details. The threshold voltage VTH =
VCC/2.
5
FBSEL
TTL/CMOS Input Select Control. Selects either internal or external feedback (zero-delay
function). Internal 25k pull-up. The threshold voltage VTH = VCC/2. Default is logic
HIGH, and selects internal feedback.
Logic HIGH: Internal feedback (from the Programmable Divider)
Logic Low: External feedback (from the FBIN inputs)
28
33
35
PD_4
PD_2
PD_0
TTL/CMOS Programmable Divider-Select Control. Internal 25k pull-down. Default is
logic LOW. The threshold voltage VTH = VCC/2. See “Programmable-Divider Select Table”
for proper decoding.
27
29
34
PD_5
PD_3
PD_1
TTL/CMOS Programmable Divider-Select Control. Internal 25k pull-up. Default is logic
HIGH. The threshold voltage VTH = VCC/2. See “Programmable-Divider Select Table” for
proper decoding.
13, 14
PDSEL1,
PDSEL0
TTL/CMOS Pre-Divider Select Input. Internal 25k pull-up. This two-bit input divider
scales the VCO/2 frequency. See “Pre-Divider Frequency Select Table” for proper
decoding. The threshold voltage VTH = VCC/2.
22
DSEL
TTL/CMOS Post-Divider Option Control. Internal 25k pull-up. Default is logic HIGH.
The threshold voltage VTH = VCC/2.
Logic HIGH: All LVPECL and LVDS outputs operate with their respective output
frequency control (PSELx, PENx, LSEL, LEN).
Logic LOW: Internal PLL is disabled, reference and XTAL signals by-passes the PLL
through a /1, /4, and /16 Post-Divider.
See “LVPECL and LVDS Output Post-Divider and Frequency Select Table” for proper
decoding.
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