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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UART with 16-Byte FIFOs
Intel
1
1.5
0.5
na
na
16
16
-
-
-
-
2.97 to 5.5
-
TQFP-48
-
S
-
-
VCC
VCC
-40 to 85
ST16C2450
Dual UART with Higher Operating Speed and Lower Access Time
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
ST16C2550
Dual UART with 16-Byte Transmit and Receive FIFOs
Dual UART with 16-Byte Transmit and Receive FIFOs
Intel
2
4
1.8
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
PLCC-44, TQFP-48
-
S
-
5.5
VCC
-40 to 85
ST16C2552
Dual Universal Asynchronous Receiver and Transmitter (UART)
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
UART With 16-Byte FIFOs
Intel
1
1.5
1
na
na
16
16
-
-
-
-
-
2.97 to 5.5
-
PLCC-44, TQFP-48
-
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
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
ST16C654
Quad UART with 64-Byte FIFO and Infrared (IrDA) Encoder/Decoder
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
ST16C654D
Quad UART with 64-Byte FIFO and Infrared (IrDA) Encoder/Decoder
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
XR16C2550
Dual UART with 16-Byte Transmit and Receive FIFOs
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
XR16C2850
Dual UART with TX and RX FIFO Counters, 128-Bytes FIFO and Automatic RS-485 Half Duplex Control
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
XR16C2852
Dual UART with TX and RX FIFO Counters, 128-Byte FIFO and Automatic RS-485 Half Duplex Control
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
XR16C854
Quad UART with RX/TX FIFO Counters and 128-Byte FIFO
NRND (Not Recommended for New Designs)
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, LQFP-64
P
5.5
VCC
-40 to 85
XR16C854D
Quad UART with RX/TX FIFO Counters and 128-Byte FIFO
NRND (Not Recommended for New Designs)
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
XR16C864
Quad UART with RX/TX FIFO Counters and 128-Byte FIFO
NRND (Not Recommended for New Designs)
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
XR16L2550
Industry Smallest Package UART with 2.25V to 5.5V Operation
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
XR16L2551
Industry Smallest Package UART with 2.25V to 5.5V Operation, Intel/Motorola Data Bus Interfaces Select and Exclusive PowerSave Feature
Industry Smallest Package UART with 2.25V to 5.5V Operation
Intel, Motorola
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
XR16L2552
Industry Smallest Package UART with 2.25V to 5.5V Operation
High-Performance 2.25V - 5.5V DUART
Intel
2
3.125
1.875
1
na
16
16
-
-
-
2.25 to 5.5
PLCC-44, TQFP-48
-
S
5.5
VCC
-40 to 85
XR16L2750
High-Performance 2.25V - 5.5V DUART
NRND (Not Recommended for New Designs)
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
XR16L2751
High-Performance 2.25V - 5.5V DUART
NRND (Not Recommended for New Designs)
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
XR16L2752
High-Performance 2.25V - 5.5V DUART
NRND (Not Recommended for New Designs)
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
XR16L580
Smallest 2.25 to 5.5V UART with 16-Byte FIFO and Power-Save
2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO
Intel, Motorola
1
3.125
2
1
na
16
16
-
-
-
2.25 to 5.5
QFN-32, TQFP-48
-
S
5.5
VCC
-40 to 85
XR16L784
High Performance 5V and 3.3V Quad UART
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
XR16M2550
High Performance Low Voltage DUART with 16-Byte FIFO
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
S
-
VCC
VCC
-40 to 85
XR16M752
High Performance DUART with 64-Byte FIFO
High Performance DUART with 64-Byte FIFO
Intel
2
na
16
12.5
8
64
64
-
1.62 to 3.63
TQFP-48
P
-
VCC
VCC
-40 to 85
XR16M890
8-bit (Intel/Motorola/VLIO) UART with 128-Byte FIFO and Integrated Level Shifters
NRND (Not Recommended for New Designs)
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
XR16V2550
High Performance DUART with 16-Byte FIFO
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
XR16V554
2.25V to 3.6V Quad UART with 16-Byte FIFO
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
XR16V554D
2.25V to 3.6V Quad UART with 16-Byte FIFO
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
XR16V564
2.25V to 3.6V Quad UART with 32-Byte FIFO
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
QFN-48
-
S
5.5
VCC
-40 to 85
XR16V598
2.25V to 3.6V High Performance Octal UART with 16-Byte FIFO
NRND (Not Recommended for New Designs)
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
XR16V654
2.25V to 3.6V Quad UART with 64-Byte FIFO
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
-
S
5.5
VCC
-40 to 85
XR16V654D
2.25V to 3.6V Quad UART with 64-Byte FIFO
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
XR16V698
2.25V to 3.6V High Performance Octal UART with 32-Byte FIFO
NRND (Not Recommended for New Designs)
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
XR16V798
2.25V to 3.6V High Performance Octal UART with 64-Byte FIFO
NRND (Not Recommended for New Designs)
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
XR68M752
High Performance DUART with 64-Byte FIFO
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