參數(shù)資料
型號: SY87700ALHG
廠商: Micrel Inc
文件頁數(shù): 14/16頁
文件大?。?/td> 0K
描述: IC CLOCK/DATA REC 208MBPS 32TQFP
標準包裝: 250
系列: AnyRate®
類型: 時鐘和數(shù)據(jù)恢復(CDR),多路復用器
PLL:
主要目的: 以太網,SONET/SDH,ATM 應用
輸入: PECL
輸出: PECL
電路數(shù): 1
比率 - 輸入:輸出: 1:3
差分 - 輸入:輸出: 是/是
頻率 - 最大: 208Mbps
電源電壓: 3.15 V ~ 3.45 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP 裸露焊盤
供應商設備封裝: 32-EPAD-TQFP
包裝: 托盤
產品目錄頁面: 1089 (CN2011-ZH PDF)
其它名稱: 576-1584
2011 Microchip Technology Inc.
DS25010C-page 7
MCP7940N
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN DESCRIPTIONS
FIGURE 3-1:
DEVICE PINOUTS
3.1
Serial Data (SDA)
This is a bidirectional pin used to transfer addresses
and data into and out of the device. It is an open-drain
terminal, therefore, the SDA bus requires a pull-up
resistor to VCC (typically 10 k
for 100 kHz, 2 k for
400 kHz). For normal data transfer, SDA is allowed to
change only during SCL low. Changes during SCL high
are reserved for indicating the Start and Stop
conditions.
3.2
Serial Clock (SCL)
This input is used to synchronize the data transfer from
and to the device.
3.3
X1, X2
External Crystal Pins.
3.4
MFP
Open-drain pin used for alarm and clock-out.
3.5
VBAT
Input for backup supply to maintain RTCC and SRAM
during the time when VCC is below VTRIP.
Pin Name
Pin Function
Vss
Ground
SDA
Bidirectional Serial Data
SCL
Serial Clock
X1
Xtal Input, External Oscillator Input
X2
Xtal Output
VBAT
Battery Backup Input (3V Typ)
MFP
Multi-Function Pin
Vcc
+1.8V to +5.5V Power Supply
X1
X2
VBAT
Vss
Vcc
MFP
SCL
SDA
1
2
3
4
8
7
6
5
SOIC/DFN/MSOP/TSSOP
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