MAX3097E Datasheet, PDF (1/16 Pages) Maxim Integrated Products – ±15kV ESD-Protected, 32Mbps, 3V/5V, Triple RS-422/RS-485 Receivers with Fault Detection

19-1727; Rev 0; 7/00
±15kV ESD-Protected, 32Mbps, 3V/5V,
Triple RS-422/RS-485 Receivers with Fault Detection
General Description
The MAX3097E/MAX3098E feature three high-speed RS-
485/RS-422 receivers with fault-detection circuitry and
fault-status outputs. The receivers’ inputs have fault
thresholds that detect when the part is not in a valid state.
The MAX3097E/MAX3098E indicate when a receiver
input is in an open-circuit condition, short-circuit condi-
tion, or outside the common-mode range. They also
generate a fault indication when the differential input
voltage goes below a preset threshold. See Ordering
Information or the Electrical Characteristics for thresh-
old values.
The fault circuitry includes a capacitor-programmable
delay to ensure that there are no erroneous fault condi-
tions even at slow edge rates. Each receiver is capable
of accepting data at rates up to 32Mbps.
________________________Applications
RS-485/RS-422 Receivers for Motor-Shaft
Encoders
High-Speed, Triple RS-485/RS-422 Receiver with
Extended Electrostatic Discharge (ESD)
Triple RS-485/RS-422 Receiver with Input Fault
Indication
Telecommunications
Embedded Systems
Typical Application Circuit
Features
o Detects the Following RS-485 Faults:
Open-Circuit Condition
Short-Circuit Condition
Low Differential Voltage Signal
Common-Mode Range Violation
o ESD Protection
±15kV—Human Body Model
±15kV—IEC 1000-4-2, Air-Gap Discharge
Method
±8kV—IEC 1000-4-2, Contact Discharge Method
o Single +3V to +5.5V Operation
o -10V to +13.2V Extended Common-Mode Range
o Capacitor-Programmable Delay of Fault Indication
Allows Error-Free Operation at Slow Data Rates
o Independent and Universal Fault Outputs
o 32Mbps Data Rate
o 16-Pin QSOP is 40% Smaller than Industry-
Standard 26LS31/32 Solutions
PART
Ordering Information
TEMP. RANGE
PIN-
PACKAGE
MAX3097ECEE
MAX3097ECSE
0°C to +70°C
0°C to +70°C
16 QSOP
16 SO
Ordering Information continued at end of data sheet.
ENCODED SIGNALS
A, A, B, B, Z, Z
MOTOR
MAX3097E
MAX3098E
RECEIVER
OUTPUTS
ALARM
OUTPUTS
DSP
8
MOTOR
CONTROLLER
MAX547
12-BIT D/A
MOTOR DRIVER
Pin Configuration
TOP VIEW
A1
A2
B3
B4
Z5
Z6
GND 7
DELAY 8
MAX3097E
MAX3098E
16 V_CC
15 ALARMA
14 OUTA
13 ALARMB
12 OUTB
11 ALARMZ
10 OUTZ
9 ALARMD
QSOP/SO/DIP
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