MAX3111EENI Maxim Integrated Products, MAX3111EENI Datasheet - Page 10

• Manufacturer Part Number: MAX3111EENI
• Description: IC TXRX RS232 SPI INT-CAP 28-DIP
• Manufacturer: Maxim Integrated Products

Specifications of MAX3111EENI

• Features: Transceiver
• Number Of Channels: 1, UART
• Protocol: RS232, RS485
• Voltage - Supply: 3 V ~ 3.6 V
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Cmos: Yes
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

The MAX3110E/MAX3111E contain an SPI/QSPI/MICROWIRE-
compatible UART and an RS-232 transceiver with two
drivers and two receivers. The UART is compatible with
SPI and QSPI for CPOL = 0 and CPHA = 0. The UART
supports data rates up to 230kbaud for standard UART
bit streams as well as IrDA and includes an 8-word
receive FIFO. Also included is a 9-bit-address recogni-
tion interrupt.
The RS-232 transceiver has electrostatic discharge
(ESD) protection on the transmitter outputs and the
receiver inputs. The internal charge-pump capacitors
minimize the number of external components required.
The RS-232 transceivers meet EIA/TIA-232 specifica-
SPI/MICROWIRE-Compatible UART and ±15kV ESD-
Protected RS-232 Transceivers with Internal Capacitors
Figure 1. MAX3110E/MAX3111E Functional Diagram
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______________________________________________________________________________________
R2OUT
R1OUT
T2IN
T1IN
CTS
RTS
C1+
C2+
V
C1-
C2-
RX
TX
X2
X1
CC
Detailed Description
Pr
Pt
Pt
Pr
I/O
9
RX SHIFT REGISTER
TX SHIFT REGISTER
GENERATOR
BAUD-RATE
9
RX BUFFER
TX BUFFER
INTERNAL
INTERNAL
9
Pr
9
9
RX FIFO
9
4
CHARGE
PUMP
INTERRUPT
tions for V
are guaranteed to operate for data rates up to 250kbps.
The UART and RS-232 functions operate as one device
or independently since the two functions share only
supply and ground connections.
The universal asynchronous receiver transmitter
(UART) interfaces the SPI/QSPI/MICROWIRE-compati-
ble synchronous serial data from a microprocessor (µP)
to asynchronous, serial-data communication ports (RS-
232, IrDA). Figure 1 shows the MAX3110E/MAX3111E
functional diagram. Included in the UART function is an
SPI/QSPI/MICROWIRE interface, a baud-rate generator,
and an interrupt generator.
LOGIC
INTERNAL
INTERNAL
CC
9
down to the minimum supply voltage and
MAX3110E/MAX3111E
INTERFACE
SPI
5k
5k
V+
GND
V-
SHDN
SCLK
CS
DIN
IRQ
T2OUT
R2IN
R1IN
DOUT
T1OUT
UART