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Part: MAX3098EBESE
Category:
Interface and Interconnect
Description: MAX3097E, MAX3098E ±15kV ESD-Protected, 32Mbps, 3V/5V,Triple RS-422/RS-485 Receivers With Fault Detection
Company: Maxim Integrated Products
Datasheet: Download MAX3098EBESE datasheet File size : 514 kB
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Datasheet text preview:
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 RS485/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 condition, 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 threshold values. The fault circuitry includes a capacitor-programmable delay to ensure that there are no erroneous fault conditions even at slow edge rates. Each receiver is capable of accepting data at rates up to 32Mbps.
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 IndustryStandard 26LS31/32 Solutions
MAX3097E/MAX3098E
________________________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
Ordering Information
PART MAX3097ECEE MAX3097ECSE TEMP. RANGE 0°C to +70°C 0°C to +70°C PINPACKAGE 16 QSOP 16 SO
Typical Application Circuit
ENCODED SIGNALS A, A, B, B, Z, Z
Ordering Information continued at end of data sheet.
Pin Configuration
TOP VIEW
MAX3097E MAX3098E A1 ALARM OUTPUTS DSP 8 A2 MOTOR CONTROLLER B3 B4 Z5 MAX547 12-BIT D/A Z6 GND 7 DELAY 8 16 VCC 15 ALARMA 14 OUTA
RECEIVER OUTPUTS
MOTOR
MAX3097E MAX3098E
13 ALARMB 12 OUTB 11 ALARMZ 10 OUTZ 9 ALARMD
MOTOR DRIVER
QSOP/SO/DIP ________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
±15kV ESD-Protected, 32Mbps, 3V/5V, Triple RS-422/RS-485 Receivers with Fault Detection MAX3097E/MAX3098E
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC)....+7V Receiver Input Voltage (A, A, B, B, Z, Z) .....±25V Output Voltage (OUT_, ALARM_)......-0.3V to (VCC + 0.3V) DELAY ........-0.3V to (VCC + 0.3V) Continuous Power Dissipation (TA = +70°C) 16-Pin QSOP (derate 8.3mW/°C above +70°C)...667mW 16-Pin SO (derate 8.7mW/°C above +70°C)........696mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....762mW Operating Temperature Ranges MAX3097EC_E .........0°C to +70°C MAX3098E_C_E .......0°C to +70°C MAX3097E_E_E ....-40°C to +85°C MAX3098E_E_E ....-40°C to +85°C Storage Temperature Range .....-65°C to +150°C Junction Temperature ......+150°C Lead Temperature (soldering, 10s) .........+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +3V to +5.5V, TA = TMIN to TMAX , unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.)
PARAMETER Supply Voltage Range Supply Current Receiver Differential Threshold Voltage (Note 1) Receiver Input Hysteresis Output High Voltage Output Low Voltage Receiver Input Resistance Input Current (A , A , B , B (Z , Z ) Output Short-Circuit Current FAULT DETECTION MAX3097E Fault-Detection Receiver Differential Threshold Voltage (Note 3) MAX3098EA Fault-Detection Receiver Differential Threshold Voltage (Note 3) FDIFH VCM = 0 FDIFL FDIFH VCM = 0 FDIFL Low limit -0.20 -0.12 Low limit High limit -475 0.12 -275 0.20 V High limit 275 475 mV SYMBOL VCC ICC VTH VTH VOH VOL RIN No load -10V VCM 13.2V -10V VCM 13.2V VCC = 4.75V, IO = -4mA, VID = 200mV VCC = 3.0V, IO = -1mA, VID = 200mV VCC = 4.75V, IO = +4mA, VID = -200mV VCC = 3.0V, IO = +1mA, VID = -200mV -10V VCM 13.2V VIN = 13.2V (Note 2) VIN = -10V (Note 2) 90 0.07 -0.05 VCC - 1.5 VCC - 1.0 0.4 0.4 160 0.14 mA -0.11 ±105 mA -200 40 CONDITIONS MIN 3 TYP 3.1 MAX 5.5 4.0 +200 UNITS V mA mV mV V V k
IIN
VCC = 0 or 5.5V 0 VRO VCC
IOSR
2
_______________________________________________________________________________________
±15kV ESD-Protected, 32Mbps, 3V/5V, Triple RS-422/RS-485 Receivers with Fault Detection
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3V to +5.5V, TA = TMIN to TMAX , unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.)
MAX3097E/MAX3098E
PARAMETER MAX3098EB Fault-Detection Receiver Differential Threshold Voltage (Note 3) Fault-Detection Common-Mode Voltage Range (Note 4) DELAY Current Source DELAY Threshold ESD PROTECTION
SYMBOL FDIFH VCM = 0 FDIFL FCMH FCML High limit Low limit
CONDITIONS High limit Low limit
MIN 70 -250 13.2
TYP
MAX 250
UNITS mV
-70 V µA V
-10 9 1.55 3.1 10 1.73 3.29 ±15 ±15 ±8 11 1.90 3.5
VCC = 5V, VDELAY = 0 VCC = 3V VCC = 5V Human Body Model
ESD Protection (A, A, B, B, Z, Z)
IEC1000-4-2 (Air-Gap Discharge) IEC1000-4-2 (Contact Discharge)
kV
SWITCHING CHARACTERISTICS
(VCC = +3V to +5.5V, VID = ±3.0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.)
PARAMETER Propagation Delay from Input to Output Receiver Skew |tPLH - tPHL| Channel-to-Channel Propagation Delay Skew Maximum Data Rate FAULT DETECTION Differential Fault Propagation Delay to Output (Note 5) Minimum Differential Slew Rate to Avoid False Alarm Output Common-Mode Fault Propagation Delay to Output (Note 5) tC M F L H CL = 15pF, Figures 1, 4 tC M F H L 1.5 tD F L H CLF = 15pF, Figures 1, 3 tDFHL MAX3097E (Note 6) MAX3098E (Note 7) 1.0 V/µs 0.33 15 µs 1.2 15 µs fMAX SYMBOL tPLH, tPHL tS K E W CL = 15pF, Figures 1, 2 CONDITIONS VCC = 4.5V to 5.5V VCC = 3.0V to 3.6V MIN TYP MAX 75 85 ±10 ±10 32 UNITS ns ns ns Mbps
CL = 15pF, Figures 1, 2 CL = 15pF, Figures 1, 2 CL = 15pF, Figure 1
Note 1: Note 2: Note 3: Note 4:
VCM is the common-mode input voltage. VID is the differential input voltage. VIN is the input voltage at pins A, A, B, B, Z, Z. A differential terminating resistor is required for proper function of open-circuit fault detection (see Applications Information). See Applications Information for a discussion of the receiver common-mode voltage range and the operating conditions for fault indication. Note 5: Applies to the individual channel immediate-fault outputs (ALARM_) and the general delayed-fault output (ALARMD) when there is no external capacitor at DELAY. Note 6: Equivalent pulse test: 1.3V / (tDFLH - tDFHL) SRD. Note 7: Equivalent pulse test: 0.62V / (tDFLH - tDFHL) SRD. _______________________________________________________________________________________ 3
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