8-Bit/VLIO UARTs

MaxLinear’s 8-bit UARTs are the industry’s largest UART product family offering devices from 1 to 8 channels and FIFO sizes up to 128 Bytes. Each UART has a parallel 8-bit bus interface. The UART offloads the serialization and de-serialization of the data from the MCU or processor. The enhanced features simplify hardware design and software development. The “Intel” interface has separate address, data, read and write lines. The “Motorola” interface has separate address and data lines, but the read/write lines are shared. The “VLIO” interface has separate read and write lines, but the address and data lines are multiplexed. Almost all of the 8-bit UARTs are compatible with the industry-standard 16550 UARTs, hence, they can use the standard serial port drivers in almost all operating systems.

The 2-channel 8-bit UART family integrates 2 UARTs into a single package and further simplifies the hardware design by eliminating redundant external components. In the “Intel” mode, there is a chip select and interrupt pin per channel. In the “Motorola” mode, there is only 1 chip select and 1 interrupt pin. Most UARTs in this family are software compatible with the industry standard 16550 UART, so they can be used with the standard serial port drivers in most operating systems. Some products in this family also have a parallel port (ST16C452/452PS/552/552A). The parallel ports will work with standard parallel port drivers.

The 4-channel and 8-channel product families integrate 4 and 8 UARTs into a single package. In addition, the XR16L784 and XR16xx98 families also support a single chip select and single interrupt pin in both the “Intel” and “Motorola” mode to simplify the hardware design. These devices also have a global interrupt status register so the software can quickly determine which UART generated the interrupt without having to check the status of all of the individual UART channels. Almost all of these UARTs are based on the industry-standard 16550 UART, and are therefore compatible with standard serial port drivers. However, some driver customization may be required. Assistance for customizing software drivers is available from MaxLinear’s UART technical support team.


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Dual UART with 8 Bytes Transmit and Receive FIFO
Intel
2
1
0.5
na
na
8
8
-
-
2.97 to 5.5
PLCC-44
-
S
-
5.5
VCC
-40 to 85
Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels
Intel
2
1
na
na
na
1
3
-
-
4.5 to 5.5
CDIP-40, PDIP-28, PDIP-40, PLCC-44
-
-
-
-
VCC
VCC
-40 to 85
Dual UART with 16 Bytes Transmit and Receive FIFO
Intel
2
1
0.5
na
na
16
16
-
-
2.97 to 5.5
PLCC-44, LQFP-44
-
S
-
5.5
VCC
-40 to 85
Quad UART with Four Fully Independent Full-Duplex Asynchronous Communication Channels
Intel, Motorola
4
1
na
na
na
3
3
-
-
-
4.5 to 5.5
PLCC-44, PLCC-68
-
-
-
-
VCC
VCC
-40 to 85
High Performance DUART with 64-Byte FIFO
Intel, Motorola
2
na
16
12.5
8
64
64
-
1.62 to 3.63
TQFP-48, QFN-32
S
-
VCC
VCC
-40 to 85
Dual UART with Eight Bytes Transmit and Receive FIFO
Motorola
2
1
0.5
na
na
8
8
-
-
2.97 to 5.5
PDIP-40, PLCC-44, LQFP-44
-
S
-
5.5
VCC
-40 to 85
Dual UART with Two Fully Independent Full Duplex Asynchronous Communications Channels
Motorola
2
1
na
na
na
1
3
-
-
4.5 to 5.5
PDIP-40, PLCC-44
-
-
-
-
VCC
VCC
-40 to 85
Dual UART with 16 Bytes Transmit and Receive FIFO
Motorola
2
1
0.5
na
na
16
16
-
-
2.97 to 5.5
PLCC-44, LQFP-44
-
S
-
5.5
VCC
-40 to 85
2.25V to 3.6V High Performance Octal UART with 64-Byte FIFO
Intel, Motorola
8
na
8
6.25
na
64
64
-
2.25 to 3.63
QFP-100
P
5.5
VCC
-40 to 85
2.25V to 3.6V High Performance Octal UART with 32-Byte FIFO
Intel, Motorola
8
na
15
10
na
32
32
2.25 to 3.63
QFP-100
P
5.5
VCC
-40 to 85
2.25V to 3.6V Quad UART with 64-Byte FIFO
Intel
4
na
16
12.5
na
64
64
-
-
2.25 to 3.63
LQFP-64
-
S
5.5
VCC
-40 to 85
2.25V to 3.6V Quad UART with 64-Byte FIFO
Intel, Motorola
4
na
16
12.5
na
64
64
-
-
2.25 to 3.63
LQFP-64, QFN-48, LQFP-80
-
S
5.5
VCC
-40 to 85
2.25V to 3.6V High Performance Octal UART with 16-Byte FIFO
Intel, Motorola
8
na
15
10
na
16
16
2.25 to 3.63
QFP-100
P
5.5
VCC
-40 to 85
2.25V to 3.6V Quad UART with 32-Byte FIFO
Intel
4
na
16
12.5
na
32
32
-
-
2.25 to 3.63
LQFP-64
-
S
5.5
VCC
-40 to 85
2.25V to 3.6V Quad UART with 32-Byte FIFO
Intel, Motorola
4
na
16
12.5
na
32
32
-
-
2.25 to 3.63
PLCC-68, LQFP-64, QFN-48, LQFP-80
-
S
5.5
VCC
-40 to 85
2.25V to 3.6V Quad UART with 16-Byte FIFO
Intel
4
na
4
3.125
na
16
16
-
-
-
-
-
2.25 to 3.63
-
LQFP-64
-
S
-
5.5
VCC
-40 to 85
2.25V to 3.6V Quad UART with 16-Byte FIFO
Intel, Motorola
4
na
4
3.125
na
16
16
-
-
-
-
-
2.25 to 3.63
-
LQFP-64
-
S
-
5.5
VCC
-40 to 85
High Performance DUART with 64-Byte FIFO
Intel
2
na
8
6.25
na
64
64
-
2.25 to 3.63
TQFP-48, QFN-32
P
5.5
VCC
-40 to 85
High Performance DUART with 16-Byte FIFO
Intel
2
na
16
12.5
na
16
16
-
-
2.25 to 3.63
QFN-32
S
5.5
VCC
-40 to 85
8-bit (Intel/Motorola/VLIO) UART with 128-Byte FIFO and Integrated Level Shifters
Intel, Motorola, VLIO
1
na
25
16
9
128
128
1.62 to 3.63
QFN-32
P
5.5
1.62-3.63
-40 to 85
1.62V to 3.63V UART with 64-Byte FIFO and VLIO Interface
VLIO
1
na
20
16
10
64
64
1.62 to 3.63
QFN-24, QFN-32
P
-
VCC
VCC
-40 to 85
1.62V to 3.63V High Performance UART with 64-Byte FIFO
Intel, Motorola
1
na
16
12.5
7.5
64
64
1.62 to 3.63
QFN-32, TQFP-48
P
-
VCC
VCC
-40 to 85
1.62V to 3.63V Single UART with 64-Byte FIFO
Intel
1
na
16
12.5
7.5
64
64
1.62 to 3.63
QFN-24, QFN-32
P
-
VCC
VCC
-40 to 85
High Performance DUART with 64-Byte FIFO
Intel
2
na
16
12.5
8
64
64
-
1.62 to 3.63
TQFP-48, QFN-32
P
-
VCC
VCC
-40 to 85
1.62V to 3.63V Quad UART with 64-Byte FIFO
Intel, Motorola
4
na
16
12.5
8
64
64
-
-
1.62 to 3.63
QFN-48
-
S
-
VCC
VCC
-40 to 85
1.62V to 3.63V Single UART with 16-Byte FIFO
Intel
1
na
16
12.5
7.5
16
16
1.62 to 3.63
QFN-24, QFN-32
S
-
VCC
VCC
-40 to 85
1.62V TO 3.63V Quad UART WITH 32-Byte FIFO
Intel, Motorola
4
na
16
12.5
8
32
32
-
-
1.62 to 3.63
LQFP-64
-
S
-
VCC
VCC
-40 to 85
High Performance Low Voltage DUART with 16-Byte FIFO
Intel
2
na
16
12.5
8
16
16
-
-
1.62 to 3.63
TQFP-48, QFN-32
S
-
VCC
VCC
-40 to 85
High-Performance 3.3V Octal UART
Intel, Motorola
8
6.25
4
na
na
64
64
-
-
2.97 to 5.5
QFP-100
P
5.5
VCC
-40 to 85
High Performance 5V and 3.3V Quad UART
Intel, Motorola
4
6.25
4
na
na
64
64
-
-
2.97 to 5.5
LQFP-64
P
5.5
VCC
-40 to 85
2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO
Intel, Motorola
1
3
2
1.5
na
16
16
-
-
-
2.25 to 5.5
QFN-24, QFN-32, TQFP-48
-
S
5.5
VCC
-40 to 85
Smallest 2.25 to 5.5V UART with 16-Byte FIFO and Power-Save
Intel
1
3
2
1.5
0.75
16
16
-
-
-
1.62 to 5.5
QFN-24, QFN-32
-
S
5.5
VCC
-40 to 85
Smallest 1.62V to 5.5V UART with 16-Byte FIFO and Power-Save
Intel
2
6.25
4
3
na
64
64
-
-
2.25 to 5.5
PLCC-44
P
5.5
VCC
-40 to 85
High-Performance 2.25V - 5.5V DUART
Intel, Motorola
2
6.25
4
3
na
64
64
-
-
2.25 to 5.5
TQFP-48
P
5.5
VCC
-40 to 85
High-Performance 2.25V - 5.5V DUART
Intel
2
6.25
4
3
na
64
64
-
-
2.25 to 5.5
TQFP-48
P
5.5
VCC
-40 to 85
High-Performance 2.25V - 5.5V DUART
Intel
2
3.125
1.875
1
na
64
64
-
-
-
2.25 to 5.5
PLCC-44, TQFP-48
-
S
5.5
VCC
-40 to 85
Industry Smallest Package UART with 2.25V to 5.5V Operation
Intel, Motorola
2
3.125
1.875
1
na
64
64
-
-
-
2.25 to 5.5
QFN-32, TQFP-48
-
S
5.5
VCC
-40 to 85
Industry Smallest Package UART with 2.25V to 5.5V Operation, Intel/Motorola Data Bus Interfaces Select and Exclusive PowerSave Feature
Intel
2
3.125
1.875
1
na
16
16
-
-
-
2.25 to 5.5
QFN-32, TQFP-48
-
S
5.5
VCC
-40 to 85
Industry Smallest Package UART with 2.25V to 5.5V Operation
Intel
2
1.5
1.2
1
na
1
1
-
-
-
-
-
2.25 to 5.5
-
PLCC-44, TQFP-48
-
-
-
5.5
VCC
-40 to 85
Quad UART with RX/TX FIFO Counters and 128-Byte FIFO
Intel, Motorola
4
2
1.5
na
na
128
128
-
-
2.97 to 5.5
QFP-100
P
5.5
VCC
-40 to 85
Quad UART with RX/TX FIFO Counters and 128-Byte FIFO
Intel, Motorola
4
2
1.5
na
na
128
128
-
-
2.97 to 5.5
LQFP-64
P
5.5
VCC
-40 to 85
Quad UART with RX/TX FIFO Counters and 128-Byte FIFO
Intel, Motorola
4
2
1.5
na
na
128
128
-
-
2.97 to 5.5
PLCC-68, QFP-100, LQFP-64
P
5.5
VCC
-40 to 85
UART with 128-Byte FIFO and Infrared (IrDA) Encoder/Decoder
Intel, PC COM Port
1
2.2
1.3
na
na
128
128
-
-
-
2.97 to 5.5
PLCC-44, TQFP-48
P
5.5
VCC
-40 to 85
Dual UART with TX and RX FIFO Counters, 128-Byte FIFO and Automatic RS-485 Half Duplex Control
Intel
2
3.125
2
na
na
128
128
-
-
2.97 to 5.5
PLCC-44
P
5.5
VCC
-40 to 85
Dual UART with TX and RX FIFO Counters, 128-Bytes FIFO and Automatic RS-485 Half Duplex Control
Intel
2
6.25
4
na
na
128
128
-
-
2.97 to 5.5
PLCC-44, TQFP-48
P
5.5
VCC
-40 to 85
Dual UART with 16-Byte Transmit and Receive FIFOs
Intel
2
4
1.875
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
TQFP-48
-
S
-
5.5
VCC
-40 to 85
Quad UART with 16-Byte FIFOs
Motorola
4
1.5
0.5
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
PLCC-68
-
S
-
-
VCC
VCC
-40 to 85
Quad UART with 64-Byte FIFO and Infrared (IrDA) Encoder/Decoder
Intel, Motorola
4
1.5
0.5
na
na
64
64
-
-
-
2.97 to 5.5
LQFP-64
-
S
-
VCC
VCC
-40 to 85
Quad UART with 64-Byte FIFO and Infrared (IrDA) Encoder/Decoder
Intel, Motorola
4
1.5
0.5
na
na
64
64
-
-
-
2.97 to 5.5
PLCC-68, QFP-100, LQFP-64
-
S
-
VCC
VCC
-40 to 85
UART with 32-Byte FIFOs and Infrared (IrDA) Encoder/Decoder
Intel, PC COM Port
1
3.125
2
na
na
32
32
-
-
-
2.97 to 5.5
PLCC-44, TQFP-48
-
S
5.5
VCC
-40 to 85
Quad UART with 16-Byte FIFOs
Intel, Motorola
4
1.5
0.5
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
PLCC-68, LQFP-64
-
S
-
-
VCC
VCC
-40 to 85
Quad UART with 16-Byte FIFOs
Intel, Motorola
4
1.5
0.5
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
LQFP-64
-
S
-
-
VCC
VCC
-40 to 85
Dual UART With 16-Byte FIFO and Parallel Printer Port
Intel
2
1.5
0.5
na
na
16
16
-
-
-
-
2.97 to 5.5
-
PLCC-68
-
S
-
5.5
VCC
-40 to 85
UART With 16-Byte FIFOs
Intel
1
1.5
1
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
PDIP-40, PLCC-44, TQFP-48
-
S
-
-
VCC
VCC
-40 to 85
Dual UART with Parallel Printer Port
Intel
2
1.5
0.5
na
na
1
1
-
-
-
-
2.97 to 5.5
-
PLCC-68
-
-
-
5.5
VCC
-40 to 85
Dual Universal Asynchronous Receiver and Transmitter (UART)
Intel
2
4
1.8
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
PLCC-44
-
S
-
5.5
VCC
-40 to 85
Dual UART with 16-Byte Transmit and Receive FIFOs
Intel
2
4
1.8
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
PDIP-40, PLCC-44, TQFP-48
-
S
-
5.5
VCC
-40 to 85
Dual UART with Higher Operating Speed and Lower Access Time
Intel
2
1.5
1
na
na
1
1
-
-
-
-
-
2.97 to 5.5
-
PLCC-44
-
-
-
5.5
VCC
-40 to 85
UART with 16-Byte FIFOs
Intel
1
1.5
0.5
na
na
16
16
-
-
-
-
2.97 to 5.5
-
PLCC-28, TQFP-48
-
S
-
-
VCC
VCC
-40 to 85
UART with 16-Byte FIFOs
Intel
1
1.5
0.5
na
na
16
16
-
-
-
-
2.97 to 5.5
-
PLCC-28, TQFP-48
-
S
-
-
VCC
VCC
-40 to 85