MAX14830 datasheet(2/68 Pages) MAXIM

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Maxim Integrated

Quad Serial UART with 128-Word FIFOs

MAX14830

General Description .. .. .. ... ... .. ... .. ... .. ... ... .. ... ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... . 1

Applications . ... .. ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... .. ... ... .. ... ... .. 1

Features . .. ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. . 1

Ordering Information . ... .. ... .. ... .. ... .. ... ... .. ... ... .. ... .. ... ... ... .. ... .. ... ... .. ... ... .. . 1

Functional Diagram . ... .. ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... ... .. ... .. .. 7

Absolute Maximum Ratings . .. ... ... .. .. ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... ... .. ... .. ... ... . 8

Package Thermal Characteristics.. .. ... ... .. ... ... .. ... .. ... .. ... ... .. ... ... .. ... .. ... ... ... .. ... . 8

DC Electrical Characteristics . ... .. ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... .. ... ... .. ... 8

AC Electrical Characteristics ... ... .. ... ... .. ... .. ... .. ... ... .. ... .. ... ... .. ... ... ... .. ... .. ... .. 10

Test Circuits/Timing Diagrams .. ... ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... .. ... ... .. .. 13

Typical Operating Characteristics . ... .. ... ... .. ... .. ... .. ... .. ... ... .. ... ... .. ... ... .. ... ... .. ... 14

Pin Configuration .. ... ... .. ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... ... .. ... ... .. ... ... .. ... . 15

Pin Description .. .. ... ... .. ... ... .. ... .. ... .. ... ... .. ... ... .. ... .. ... ... ... .. ... .. ... ... .. ... . 15

Detailed Description.. .. ... ... .. ... ... .. ... .. ... .. ... ... .. ... ... .. ... .. ... ... ... .. ... .. ... ... .. 18

Receive and Transmit FIFOs ................................................................... 18

Transmitter Operation ........................................................................ 18

Receiver Operation .......................................................................... 19

Line Noise Indication.........................................................................20

Clocking and Baud-Rate Generation ............................................................ 20

Crystal Oscillator .........................................................................20

External Clock Source ..................................................................... 20

PLL and Predivider ..........................................................................20

Fractional Baud-Rate Generators ............................................................... 21

2x and 4x Rate Modes ....................................................................... 21

Low-Frequency Timer ........................................................................ 22

UART Clock to GPIO......................................................................... 22

Multidrop Mode ............................................................................. 22

Auto Data Filtering in Multidrop Mode ......................................................... 22

Auto Transceiver Direction Control .............................................................. 22

Transmitter Triggering and Synchronization ....................................................... 23

Transmitter Synchronization ................................................................. 23

Intrachip and Interchip Synchronization........................................................ 23

Delayed Triggering........................................................................ 23

Trigger Accuracy ......................................................................... 24

Synchronization Accuracy .................................................................. 24

Auto Transmitter Disable ...................................................................... 24

Echo Suppression ........................................................................... 24

Auto Hardware Flow Control ................................................................... 26

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