MAX3140EEI+ Maxim Integrated Products, MAX3140EEI+ Datasheet - Page 32

• 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
Listing 1 is a C-language outline of an interrupt-driven
software driver that interfaces to a MAX3140, providing
an intermediate layer between the bit-manipulation sub-
routine and the familiar PutChar/GetChar subroutines.
Listing 1. Outline for a MAX3140 Software Driver
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Software Driver
The user must supply code for managing the transmit
and receive queues, as well as the low-level hardware
interface itself. The interrupt control hardware must be
initialized before this driver is called.