参数资料
型号: LTC2850CDD#TRPBF
厂商: Linear Technology
文件页数: 18/18页
文件大小: 0K
描述: IC TXRX RS485 20MBPS 8-DFN
标准包装: 2,500
类型: 收发器
驱动器/接收器数: 1/1
规程: RS422,RS485
电源电压: 3 V ~ 3.6 V
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
供应商设备封装: 8-DFN-EP(3x3)
包装: 带卷 (TR)
LTC2850/LTC2851/LTC2852
285012fd
FuncTion Tables
pin FuncTions
RO: Receiver Output. If the receiver output is enabled (RE
low) and A > B by 200mV, then RO will be high. If A < B
by 200mV, then RO will be low. If the receiver inputs are
open, shorted, or terminated without a valid signal, RO
will be high.
RE:ReceiverEnable.Alowenablesthereceiver.Ahighinput
forces the receiver output into a high impedance state.
DE: Driver Enable. A high on DE enables the driver. A low
input will force the driver outputs into a high impedance.
If RE is high with DE low, the part will enter a low power
shutdown state.
DI: Driver Input. If the driver outputs are enabled (DE
high), then a low on DI forces the driver positive output
low and negative output high. A high on DI, with the driver
outputs enabled, forces the driver positive output high and
negative output low.
GND: Ground.
Y: Noninverting Driver Output for LTC2851 and LTC2852.
High impedance when driver disabled or unpowered.
Z: Inverting Driver Output for LTC2851 and LTC2852. High
impedance when driver disabled or unpowered.
A: Noninverting Receiver Input (and Noninverting Driver
Output for LTC2850). Impedance is >96k
Ω in receive
mode or unpowered.
B: Inverting Receiver Input (and Inverting Driver Output
for LTC2850). Impedance is >96k
Ω in receive mode or
unpowered.
VCC: Positive Supply. 3V < VCC < 3.6V. Bypass with 0.1F
ceramic capacitor.
Exposed Pad: Ground. The exposed pads on the DFN
packages must be soldered to ground.
LTC2850
Logic Inputs
Mode
A, B
RO
DE
RE
0
Receive
RIN
Driven
0
1
Shutdown
RIN
Hi-Z
1
0
Transceive
Driven
1
Transmit
Driven
Hi-Z
LTC2852
Logic Inputs
Mode
A, B
Y, Z
RO
DE
RE
0
Receive
RIN
Hi-Z
Driven
0
1
Shutdown
RIN
Hi-Z
1
0
Transceive
RIN
Driven
1
Transmit
RIN
Driven
Hi-Z
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