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MAX3097ECPE

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
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
Features
♦ Detects the Following RS-485 Faults:
Open-Circuit Condition
Short-Circuit Condition
Low Differential Voltage Signal
Common-Mode Range Violation
♦ ESD Protection
±15kV—Human Body Model
±15kV—IEC 1000-4-2, Air-Gap Discharge
Method
±8kV—IEC 1000-4-2, Contact Discharge Method
♦ Single +3V to +5.5V Operation
♦ -10V to +13.2V Extended Common-Mode Range
♦ Capacitor-Programmable Delay of Fault Indication
Allows Error-Free Operation at Slow Data Rates
♦ Independent and Universal Fault Outputs
♦ 32Mbps Data Rate
♦ 16-Pin QSOP is 40% Smaller than Industry-
Standard 26LS31/32 Solutions
MAX3097E/MAX3098E
±15kV ESD-Protected, 32Mbps, 3V/5V,
Triple RS-422/RS-485 Receivers with Fault Detection
________________________________________________________________ Maxim Integrated Products 1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
AV
CC
ALARMA
OUTA
ALARMB
OUTB
ALARMZ
OUTZ
ALARMD
TOP VIEW
MAX3097E
MAX3098E
QSOP/SO/DIP
A
B
Z
B
Z
GND
DELAY
Pin Configuration
ENCODED SIGNALS
A, A, B, B, Z, Z
MOTOR DRIVER
MOTOR
MOTOR
CONTROLLER
ALARM
OUTPUTS
RECEIVER
OUTPUTS
DSP
8
MAX3097E
MAX3098E
MAX547
12-BIT D/A
Typical Application Circuit
19-1727; Rev 0; 7/00
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.
Ordering Information
PART TEMP. RANGE
PIN-
PACKAGE
MAX3097ECEE 0°C to +70°C 16 QSOP
MAX3097ECSE 0°C to +70°C 16 SO
Ordering Information continued at end of data sheet.
MAX3097E/MAX3098E
±15kV ESD-Protected, 32Mbps, 3V/5V,
Triple RS-422/RS-485 Receivers with Fault Detection
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°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.
Supply Voltage (V
CC
).............................................................+7V
Receiver Input Voltage (A, A, B, B, Z, Z) .............................±25V
Output Voltage (OUT_, ALARM_)...............-0.3V to (V
CC
+ 0.3V)
DELAY ........................................................-0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
CC
3 5.5 V
Supply Current I
CC
No load 3.1 4.0 mA
Receiver Differential Threshold
Voltage (Note 1)
V
TH
-10V ≤ V
CM
≤ 13.2V -200 +200 mV
Receiver Input Hysteresis ∆V
TH
-10V ≤ V
CM
≤ 13.2V 40 mV
V
CC
= 4.75V, I
O
= -4mA, V
ID
= 200mV V
CC
- 1.5
Output High Voltage V
OH
V
CC
= 3.0V, I
O
= -1mA, V
ID
= 200mV V
CC
- 1.0
V
V
CC
= 4.75V, I
O
= +4mA, V
ID
= -200mV 0.4
Output Low Voltage V
OL
V
CC
= 3.0V, I
O
= +1mA, V
ID
= -200mV 0.4
V
Receiver Input Resistance R
IN
-10V ≤ V
CM
≤ 13.2V 90 160 kΩ
V
IN
= 13.2V
(Note 2)
0.07 0.14
Input Current
(A , A , B , B (Z , Z )
I
IN
V
CC
= 0 or 5.5V
V
IN
= -10V
(Note 2)
-0.05 -0.11
mA
Output Short-Circuit Current I
OSR
0 ≤ V
RO
≤ V
CC
±105 mA
FAULT DETECTION
F
DIFH
High limit 275 475
MAX3097E Fault-Detection
Receiver Differential Threshold
Voltage (Note 3)
F
DIFL
V
CM
= 0
Low limit -475 -275
mV
F
DIFH
High limit 0.12 0.20
MAX3098EA Fault-Detection
Receiver Differential Threshold
Voltage (Note 3)
F
DIFL
V
CM
= 0
Low limit -0.20 -0.12
V
MAX3097E/MAX3098E
±15kV ESD-Protected, 32Mbps, 3V/5V,
Triple RS-422/RS-485 Receivers with Fault Detection
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.)
SWITCHING CHARACTERISTICS
(V
CC
= +3V to +5.5V, V
ID
= ±3.0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
= 4.5V to 5.5V 75
Propagation Delay from Input to
Output
t
PLH
, t
PHL
C
L
= 15pF,
Figures 1, 2
V
CC
= 3.0V to 3.6V 85
ns
Receiver Skew |t
PLH
- t
PHL
|t
SKEW
C
L
= 15pF, Figures 1, 2 ±10 ns
Channel-to-Channel
Propagation Delay Skew
C
L
= 15pF, Figures 1, 2 ±10 ns
Maximum Data Rate f
MAX
C
L
= 15pF, Figure 1 32 Mbps
FAULT DETECTION
t
DFLH
15
Differential Fault Propagation
Delay to Output (Note 5)
t
DFHL
C
LF
= 15pF, Figures 1, 3
1.2
µs
MAX3097E (Note 6) 1.0
Minimum Differential Slew Rate
to Avoid False Alarm Output
MAX3098E (Note 7) 0.33
V/µs
t
CMFLH
15
Common-Mode Fault
Propagation Delay to Output
(Note 5)
t
CMFHL
C
L
= 15pF, Figures 1, 4
1.5
µs
Note 1: V
CM
is the common-mode input voltage. V
ID
is the differential input voltage.
Note 2: V
IN
is the input voltage at pins A, A, B, B, Z, Z.
Note 3: A differential terminating resistor is required for proper function of open-circuit fault detection (see Applications Information).
Note 4: 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 / (t
DFLH
- t
DFHL
) ≥ SR
D
.
Note 7: Equivalent pulse test: 0.62V / (t
DFLH
- t
DFHL
) ≥ SR
D
.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
F
DIFH
High limit 70 250
MAX3098EB Fault-Detection
Receiver Differential Threshold
Voltage (Note 3)
F
DIFL
V
CM
= 0
Low limit -250 -70
mV
F
CMH
High limit 13.2
Fault-Detection Common-Mode
Voltage Range (Note 4)
F
CML
Low limit -10
V
DELAY Current Source V
CC
= 5V, V
DELAY
= 0 9 10 11 µA
V
CC
= 3V 1.55 1.73 1.90
DELAY Threshold
V
CC
= 5V 3.1 3.29 3.5
V
ESD PROTECTION
Human Body Model ±15
IEC1000-4-2 (Air-Gap Discharge) ±15
ESD Protection
(A, A, B, B, Z, Z)
IEC1000-4-2 (Contact Discharge)
±8
kV
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX3097ECPE

Mfr. #:
Buy MAX3097ECPE
Manufacturer:
Maxim Integrated
Description:
RS-422/RS-485 Interface IC 15kV ESD-Protected, 32Mbps, 3V/5V,Triple RS-422/RS-485 Receivers with Fault Detection
Lifecycle:
New from this manufacturer.
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