MAX3140EEI+ Maxim Integrated Products, MAX3140EEI+ Datasheet - Page 8

• Manufacturer Part Number: MAX3140EEI+
• Description: IC UART W/RS485 28-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX3140EEI+

• Features: Transceiver
• Fifo's: 8 Byte
• Protocol: RS232, RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 28-QSOP
• Data Rate: 115 Kbps
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 4.75 V
• Supply Current: 0.7 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• No. Of Channels: 1
• Uart Features: Half / Full-Duplex Operation, True Fail-Safe Receiver Output
• Supply Voltage Range: 4.75V To 5.25V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SPI/MICROWIRE-Compatible UART with Integrated
True Fail-Safe RS-485/RS-422 Transceivers
(V
8
CC
1000
900
800
700
600
500
400
300
200
100
600
500
400
300
200
100
700
_______________________________________________________________________________________
60
50
40
30
20
10
0
0
0
= +5V, T
-40
0
0
1.8432MHz CRYSTAL
TRANSMITTING AT 115.2 kbps
vs. RECEIVER OUTPUT LOW VOLTAGE
-20
EXTERNAL CLOCK FREQUENCY
EXTERNAL CLOCK FREQUENCY (MHz)
UART SUPPLY CURRENT vs.
RS-485 OUTPUT CURRENT
A
UART SUPPLY CURRENT
1
1
= +25°C, unless otherwise noted.)
OUTPUT LOW VOLTAGE (V)
vs. TEMPERATURE
0
TEMPERATURE (°C)
2
2
20
40
3
3
60
4
4
80
100
5
5
10
90
80
70
60
50
40
30
20
10
30
25
20
15
10
9
8
7
6
5
4
3
2
1
0
0
5
0
-40
0
0
vs. RECEIVER OUTPUT HIGH VOLTAGE
TX, RTS, DOUT OUTPUT CURRENT
0.1
-20
UART SHUTDOWN CURRENT
vs. OUTPUT LOW VOLTAGE
RS-485 OUTPUT CURRENT
0.2
1
OUTPUT HIGH VOLTAGE (V)
OUTPUT LOW VOLTAGE (V)
vs. TEMPERATURE
0.3
0
TEMPERATURE (°C)
0.4
2
20
0.5
1.8432MHz CRYSTAL
Typical Operating Characteristics
40
0.6 0.7 0.8
3
RTS
DOUT
60
4
TX
80
0.9
100
1.0
5
350
300
250
150
100
400
200
525
500
475
450
425
400
375
350
325
300
50
20
18
16
14
12
10
8
6
4
2
0
100
-60
-60
SUPPLY CURRENT vs. TEMPERATURE
1.8432 MHz
A: SRL = GND
CRYSTAL
RS-485 TRANSCEIVER SHUTDOWN
RS-485 TRANSCEIVER NO-LOAD
A
B
A
B
-40 -20
-40 -20
CURRENT vs. TEMPERATURE
UART SUPPLY CURRENT
1000
vs. BAUD RATE
TEMPERATURE (°C)
TEMPERATURE (°C)
BAUD RATE (bps)
TRANSMITTING
0
0
10k
20
20
B: SRL = OPEN OR V
40
40
100k
DE = GND
60
60
STANDBY
DE = V
80
80
CC
CC
1M
100
100