参数资料
型号: LTC4300A-2CMS8#PBF
厂商: Linear Technology
文件页数: 5/16页
文件大小: 182K
描述: IC BUFFER BUS 2WR HOTSWAP 8-MSOP
产品培训模块: LTC4310 - Hot-Swappable I²C Isolators
标准包装: 50
类型: 热交换开关
应用: 通用型缓冲器/总线扩展器
内部开关:
电源电压: 2.7 V ~ 5.5 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-MSOP
包装: 管件
LTC4300A-1/LTC4300A-2
5
4300a12fa
PIN FUNCTIONS
ENABLE/V
CC2
 (Pin 1): Chip Enable Pin/Card Supply Volt-
age. For the LTC4300A-1, this is a digital CMOS threshold
input pin. Grounding this pin puts the part in a low current
(<1糀) mode. It also disables the rise-time accelerators,
disables the bus precharge circuitry, drives READY low,
isolates SDAIN from SDAOUT and isolates SCLIN from
SCLOUT. Drive ENABLE all the way to V
CC
 for normal
operation. Connect ENABLE to V
CC
 if this feature is not
being used. For the LTC4300A-2, this is the supply voltage
for the devices on the card I
2
C busses. Connect pull-up
resistors from SDAOUT and SCLOUT to this pin. Place a
bypass capacitor of at least 0.01糉 close to this pin for
best results.
SCLOUT (Pin 2): Serial Clock Output. Connect this pin to 
the SCL bus on the card.
SCLIN (Pin 3): Serial Clock Input. Connect this pin to the 
SCL bus on the backplane.
GND (Pin 4): Ground. Connect this pin to a ground plane 
for best results.
READY/ACC (Pin 5): Connection Flag/Rise-Time Accelera-
tor Control. For the LTC4300A-1, this is an open-drain
NMOS output which pulls low when either ENABLE is
low or the start-up sequence described in the Operation
section has not been completed. READY goes high when
ENABLE is high and start-up is complete. Connect a 10k
resistor from this pin to V
CC
 to provide the pull up. For
the LTC4300A-2, this is a CMOS threshold digital input
pin that enables and disables the rise-time accelerators
on all four SDA and SCL pins. Drive ACC all the way to the
V
CC2
 supply voltage to enable all four accelerators; drive
ACC to ground to turn them off.
SDAIN (Pin 6): Serial Data Input. Connect this pin to the 
SDA bus on the backplane.
SDAOUT (Pin 7): Serial Data Output. Connect this pin to 
the SDA bus on the card.
V
CC
 (Pin 8): Main Input Power Supply from Backplane. 
This is the supply voltage for the devices on the back-
plane I
2
C busses. Connect pull-up resistors from SDAIN
and SCLIN (and also from SDAOUT and SCLOUT for the
LTC4300A-1) to this pin. Place a bypass capacitor of at
least 0.01糉 close to this pin for best results.
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