Datasheet > RAA788172

RAA788172

更新时间： 2024-11-06 15:18:59

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
26页	818K
描述
3V Half-Duplex, 0.25 Mbps RS-485/422 Differential Transceiver with ±3kV EFT Immunity and ±16.5kV ESD Protection

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RAA788172 数据手册

Datasheet

RAA788170, RAA788172, RAA788173, RAA788175, RAA788176, RAA788178

3.3V, Full Fail-Safe, Low-Power, RS-485 Transceivers with 3kV EFT Immunity and 15kV ESD Protection

The RAA78817x family (RAA788170, RAA788172,

RAA788173, RAA788175, RAA788176, RAA788178)

▪ IEC61000 ESD protection on RS-485 I/O pins: ±15kV

of 3.3V powered single transceivers feature high

Features

• Class 3 ESD level on all other pins: >7kV HBM

output drive and high EFT and ESD protection. The

▪ ±3kV EFT immunity of bus I/O pins

devices are immune to ±3kV IEC61000-4-4 EFT

transients and withstand ±15kV IEC61000-4-2 ESD

strikes without latch-up. These devices have low bus

currents (+125µA/-100µA), so they present a true 1/8

unit load to the RS-485 bus. This allows up to 256

transceivers on the network without violating the

RS-485 specification 32 unit load maximum, and

without using repeaters. For example, in a remote

utility meter reading system, individual meter readings

are routed to a concentrator using an RS-485

network, so the high allowed node count minimizes

the number of repeaters required.

▪ Full fail-safe (open, short, terminated/floating)

receivers

▪ Hot plug - Tx and Rx outputs remain three-state

during power-up

▪ True 1/8 unit load allows up to 256 devices on the

bus

▪ Single 3.3V supply

▪ High data rates: up to 20Mbps

▪ Low quiescent supply current: 800µA (Max)

• Ultra low shutdown supply current: 10nA

Receiver (Rx) inputs feature a Full Fail-Safe design,

which ensures a logic high Rx output if Rx inputs are

floating, shorted, or terminated but undriven.

▪ -7V to +12V common-mode input/output voltage

range

▪ Half and full duplex pinouts

Hot Plug circuitry ensures that the Tx and Rx outputs

remain in a high impedance state while the power

supply stabilizes.

▪ Three state Rx and Tx outputs available

▪ Current limiting and thermal shutdown for driver

overload protection

The RAA788170 through RAA788175 use slew rate

limited drivers which reduce EMI, and minimize

reflections from improperly terminated transmission

lines, or unterminated stubs in multidrop and

multipoint applications. Slew rate limited versions also

include receiver input filtering to enhance noise

immunity in the presence of slow input signals.

▪ Tiny MSOP packages consume 50% less board

space

▪ Pb-free (RoHS compliant)

Applications

▪ Automated utility meter reading systems

▪ High node count systems

The RAA788170, RAA788173, and RAA788176 are

configured for full duplex (separate Rx input and Tx

output pins) applications. The half duplex versions

multiplex the Rx inputs and Tx outputs to allow

transceivers with output disable functions in 8 Ld

packages.

▪ Field bus networks

▪ Security camera networks

▪ Building environmental control/lighting systems

▪ Industrial/process control networks

Table 1. Summary of Features

Hot

RX/TX

Part

Number

Data Rate

(Mbps)

Slew-Rate

Limited?

# Devices

on Bus

Quiescent

(µA)

Low Power

Shutdown?

Duplex

Plug?

Enable?

Count

RAA788170

RAA788172

RAA788173

RAA788175

RAA788176

RAA788178

Full

Half

Full

Half

Full

Half

0.25

0.5

Yes

256

Yes

510

Yes

10, 14

510

10, 14

R15DS0017EU0101 Rev.1.01

Oct 2, 2023

Page 1

12 3 4 5 6 7...26

中文翻译

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与RAA788172相关器件

型号	品牌	获取价格	描述	数据表
RAA788173	RENESAS	获取价格	3V Full-Duplex, 0.5 Mbps RS-485/422 Different
RAA788175	RENESAS	获取价格	3V Half-Duplex, 0.5 Mbps RS-485/422 Different
RAA788176	RENESAS	获取价格	3V Full-Duplex, 20 Mbps RS-485/422 Differenti
RAA788178	RENESAS	获取价格	3V Half-Duplex, 20 Mbps RS-485/422 Differenti
RAA7884QR	RENESAS	获取价格	Quad, ±16.5kV ESD Protected, 3.0V to 5.5V, RS
RAA7884QT	RENESAS	获取价格	Quad, ±16.5kV ESD Protected, 3.0V to 5.5V, Lo
RAA808013	RENESAS	获取价格	5.5V 3A Compact Single-Channel DC/DC Synchronous Buck Regulator
RAA808015	RENESAS	获取价格	5.5V 5A Compact Single-Channel DC/DC Synchronous Buck Regulator
RAAB	HAMMOND	获取价格	Rackmount Adjustable Angle Bracket
RAAB2436	HAMMOND	获取价格	DATA SUBJECT TO CHANGE WITHOUT NOTLCE

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