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参数资料
| 型号： | LTC4315IMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC 2WIRE BUS BUFFER 12MSOP |
| 标准包装： | 37 |
| 类型： | 2线总线缓冲器 |
| Tx/Rx类型： | I²C Logic |
| 电容 - 输入： | 10pF |
| 电源电压： | 2.9 V ~ 5.5 V |
| 电流 - 电源： | 8.1mA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-TSSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 12-MSOP |
| 包装： | 管件 |
LTC4315
1
4315f
TYPICAL APPLICATION
FEATURES
DESCRIPTION
2-Wire Bus Buffer with
High Noise Margin
The LTC4315 is a hot-swappable 2-wire bus buffer
that provides bidirectional buffering, while maintain-
ing a low offset voltage and high noise margin up to
0.3 VCC. The high noise margin allows the LTC4315 to be
interoperable with devices that drive a high VOL (>0.4V)
and allows multiple LTC4315s to be cascaded. The LTC4315
supports level translation between 1.5V, 1.8V, 2.5V, 3.3V
and 5V busses.
During insertion, the SDA and SCL lines are precharged to
1V to minimize bus disturbances. Connection is established
between the input and output after ENABLE is asserted
high and a stop bit or bus idle condition has been detected
on the SDA and SCL pins.
If both data and clock are not simultaneously high at
least once in 45ms and DISCEN is high, a FAULT signal
is generated indicating a stuck bus low condition and the
input is disconnected from the output. Up to 16 clock
pulses are subsequently generated to free the stuck bus.
A three state ACC pin enables input and output side rise
time accelerators of various strengths.
400kHz Operation
APPLICATIONS
n Bidirectional Buffer Increases Fanout
n High Noise Margin with VIL = 0.3 VCC
n Compatible with Non-Compliant I2C Devices That
Drive a High VOL
n Selectable Rise Time Accelerator Current
n Level Shift 1.5V, 1.8V, 2.5V, 3.3V and 5V Busses
n Prevents SDA and SCL Corruption During Live Board
Insertion and Removal from Backplane
n Stuck Bus Disconnect and Recovery
n Compatible with I2C, I2C Fast Mode and SMBus
n ±4kV Human Body Model ESD Ruggedness
n High Impedance SDA, SCL pins When Unpowered
n 12-Lead (4mm × 3mm) DFN and 12-Lead MSOP
Packages
n Capacitance Buffers/Bus Extender
n Live Board Insertion
n Telecommunications Systems Including ATCA
n Level Translation
n PMBus
n Servers
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners. Protected by U.S. patents, including 6356140, 6650174, 7032051, 7478286.
LTC4315
GND
VCC
VCC2
4315 TA01a
READY
SCLOUT
SDAOUT
FAULT
DISCEN
ENABLE
SCLIN
SDAIN
ACC
SCL1
SDA1
2.7k
0.01μF
3.3V
READY
SCL2
SDA2
FAULT
1.3k
10k
5V
10k
1.3k
1V
/DIV
500ns/DIV
4315 TA01b
SCLIN
SCLOUT
RBUS_IN=2.7kΩ, CBUS_IN=50pF
RBUS_OUT=1.3kΩ, CBUS_OUT = 400pF, ACC = 0V
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