MAX3535EEWI-T Maxim Integrated, MAX3535EEWI-T Datasheet - Page 13

• Manufacturer Part Number: MAX3535EEWI-T
• Description: RS-422/RS-485 Interface IC
• Manufacturer: Maxim Integrated

Specifications of MAX3535EEWI-T

• Data Rate: 1136 Kbps
• Operating Supply Voltage: 3 V to 5.5 V
• Supply Current: 5.9 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Input Voltage: 0.8 V to 2 V
• Maximum Power Dissipation: 750 mW
• Output Voltage: 0.4 V to 3.7 V
• Product: RS-422/RS-485 Combination

Maxim Integrated
19–24
5–10,
PIN
11
12
13
14
15
16
17
18
25
26
27
28
+3V to +5V, 2500V
1
2
3
4
NAME
GND1
GND2
V
V
RO2
SLO
RO1
ST1
ST2
DE
RE
CC1
CC2
—
DI
Z
Y
B
A
Transceivers with ±15kV ESD Protection
ISOLATION SIDE
Isolated
Isolated
Isolated
Isolated
Isolated
Isolated
Isolated
Isolated
Logic
Logic
Logic
Logic
Logic
Logic
Logic
Logic
—
Logic-Side/Transformer-Driver Power Input. Bypass V
capacitors.
Transformer-Driver Phase 1 Power Output. Connect ST1 to isolation-transformer
primary to send power to isolation side of barrier.
Transformer-Driver Phase 2 Power Output. Connect ST2 to isolation-transformer
primary to send power to isolation side of barrier.
Logic-Side Ground. For isolated operation do not connect to GND2.
Removed from Package
Isolation-Side Ground. For isolated operation do not connect to GND1.
RS-485/RS-422 Inverting Driver Output. Output floats when DE is low or in a barrier fault
event. (See the Detailed Description section for more information.)
RS-485/RS-422 Noninverting Driver Output. Output floats when DE is low or in a barrier
fault event. (See the Detailed Description section for more information.)
Isolated-Side Power Input. Connect V
secondary. Bypass V
RS-485/RS-422 Differential-Receiver Inverting Input
RS-485/RS-422 Differential-Receiver Noninverting Input
Isol ated - S i d e Recei ver O utp ut. RO2 i s al w ays enab l ed . RO 2 g oes hi g h i f A - B > - 10m V .
RO2 g oes l ow i f A - B < - 200m V . Fai l - safe ci r cui tr y causes RO 2 to g o hi g h w hen A and B
fl oat or ar e shor ted .
Driver Slew-Rate Control Logic Input. Connect SLO to GND2 for data rates up to
400kbps. Connect SLO to V
Driver Input. Pull DI low (high) to force driver output Y low (high) and driver output Z
high (low).
Driver-Enable Input. The driver outputs are enabled and follow the driver input (DI)
when DE is high. When DE is floated, the driver is disabled. DE does not affect whether
the receiver is on or off.
Receiver-Output Enable and Fault Current Output. The receiver output (RO1) is
enabled and follows the differential-receiver inputs, A and B, when RE is low, otherwise
RO1 floats. RE does not affect RO2 and does not disable the driver. The asserted fault
output is a pullup current, otherwise RE shows a pulldown current.
Receiver Output. RO1 is enabled when RE is low. RO1 goes high if A - B > -10mV. RO1
goes low if A - B < -200mV. Fail-safe circuitry causes RO1 to go high when A and B
float or are shorted.
RMS
CC2
Isolated RS-485/RS-422
MAX3535E/MXL1535E
to GND2 with 10µF and 0.1µF capacitors.
CC2
or leave floating for high data rates.
CC2
FUNCTION
to the rectified output of transformer
CC1
to GND1 with 10µF and 0.1µF
Pin Description
13