MAX3098EBCSE データシートの表示（PDF） - Maxim Integrated

部品番号

コンポーネント説明

メーカー

MAX3098EBCSE

±15kV ESD-Protected, 32Mbps, 3V/5V, Triple RS-422/RS-485 Receivers with Fault Detection

Maxim Integrated 

±15kV ESD-Protected, 32Mbps, 3V/5V,

Triple RS-422/RS-485 Receivers with Fault Detection

Detailed Description

The MAX3097E/MAX3098E feature high-speed, triple

RS-485/RS-422 receivers with fault-detection circuitry

and fault-status outputs. The fault outputs are active

push-pull, requiring no pull-up resistors. The fault cir-

cuitry includes a capacitor-programmable delayed

FAULT_ output to ensure that there are no erroneous

fault conditions even at slow edge rates (see Delayed

Fault Output). The receivers operate at data rates up to

32Mbps.

The MAX3097E/MAX3098E are designed for motor-

shaft encoders with standard A, B, and Z outputs (see

Using the MAX3097E/MAX3098E as Shaft Encoder

Receivers). The devices provide an alarm for open-cir-

cuit conditions, short-circuit conditions, data nearing

the minimum differential threshold conditions, data

below the minimum threshold conditions, and receiver

inputs outside the input common-mode range. Tables 1

and 2 are functional tables for each receiver.

VA

VA

A

VID

A

ALARMA

OR (FAULT OUTPUT)

CLF ALARMD

OUTA

CL

Figure 1. Typical Receiver Test Circuit

FDIFH

OV

VID

FDIFL

-3.0V

VOH

ALARM OR ALARMD

VOL

tDFLH

VCC/2

Figure 3. Fault-Detection Timing

+3.0V

tDFHL

VCC/2

Test Circuits and Waveforms

+3V

VID

-3V

VOH

RO

VOL

OV

tPLH

VCC/2

Figure 2. Propagation Delay

FCMH

VIN

OV

FCML

RISE/FALL TIMES ≤2ns

OV

tPHL

VCC/2

tCMFLH

VOH

ALARM OR ALARMD

VOL

VCC/2

tCMFHL tCMFLH

VCC/2

VCC/2

Figure 4. Common-Mode Fault Propagation Delay

tCMFHL

VCC/2

_______________________________________________________________________________________ 7

Share Link: