LTC1485 Differential Bus Transceiver

The LTC®1485 is a low power differential bus/line transceiver designed for multipoint data transmission standard RS485 applications with extended common-mode range (12V to – 7V). It also meets the requirements of RS422.

The CMOS with Schottky design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload or ESD damage.

The driver and receiver feature three-state outputs, with the driver outputs maintaining high impedance over the entire common-mode range. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit which forces the driver outputs into a high impedance state. I/O pins are protected against multiple ESD strikes of over ±10kV.

The receiver has a fail-safe feature which guarantees a high output state when the inputs are left open.

Both AC and DC specifications are guaranteed from –40°C to 85°C and 4.75V to 5.25V supply voltage range

产品特点 Features

ESD Protection over ±10kV
Low Power: ICC= 1.8mA Typ
28ns Typical Driver Propagation Delays with 4ns Skew
Designed for RS485 or RS422 Applications
Single 5V Supply
-7V to 12V Bus Common-Mode Range Permits ±7V Ground Difference Between Devices on the Bus
Thermal Shutdown Protection
Power-Up/Down Glitch-Free Driver Outputs
Driver Maintains High Impedance in Three-State or with the Power Off
Combined Impedance of a Driver Output and Receiver Allows up to 32 Transceivers on the Bus
60mV Typical Input Hysteresis
Pin Compatible with the SN75176A, DS75176A, and SN75LBC176

应用

Low Power RS485/RS422 Transceiver
Level Translator

典型应用图

参数

LTC1485 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1485CN8	PDIP	8	C	$3.15	$2.55
LTC1485CN8#PBF	PDIP	8	C	$3.15	$2.55
LTC1485CS8	SO	8	C	$3.40	$2.70
LTC1485CS8#PBF	SO	8	C	$3.40	$2.70
LTC1485CS8#TR	SO	8	C		$2.76
LTC1485CS8#TRPBF	SO	8	C		$2.76
LTC1485IN8	PDIP	8	I	$3.85	$3.00
LTC1485IN8#PBF	PDIP	8	I	$3.85	$3.00
LTC1485IS8	SO	8	I	$4.40	$3.50
LTC1485IS8#PBF	SO	8	I	$4.40	$3.50
LTC1485IS8#TR	SO	8	I		$3.56
LTC1485IS8#TRPBF	SO	8	I		$3.56

LTC1485 数据手册及相关资料下载

数据手册 (英文) : LTC1485 - Differential Bus Transceiver.PDF
设计要点 (英文) : DN161 - The Smart Rock.PDF
可靠性数据 : R113 Reliability Data .PDF
产品选型卡 : Ultra Rugged ±60V RS485 Transceivers.PDF
产品选型卡 : RS485 Quick Guide.PDF