CAT5411

© Catalyst Semiconductor, Inc.

3

Doc. No. MD-2114 Rev. I

Characteristics subject to change without notice

DEVICE OPERATION

The CAT5411 is two resistor arrays integrated with

SPI serial interface logic, four 6-bit wiper control

registers and eight 6-bit, non-volatile memory data

registers. Each resistor array contains 63 separate

resistive elements connected in series. The physical

ends of each array are equivalent to the fixed

The tap positions between and at the ends of the

series resistors are connected to the output wiper

tap point for each potentiometer is connected to its

wiper terminal at a time and is determined by the

value of the wiper control register. Data can be read

or written to the wiper control registers or the non-

volatile memory data registers via the SPI bus.

Additional instructions allow data to be transferred

between the wiper control registers and each

respective potentiometer's non-volatile data registers.

Also, the device can be instructed to operate in an

"increment/decrement" mode.

SERIAL BUS PROTOCOL

The CAT5041 supports the SPI bus data transmission

protocol. The synchronous Serial Peripheral Interface

(SPI) helps the CAT5411 to interface directly with

many

of

today's

popular

microcontrollers.

The CAT5041 contains an 8-bit instruction register.

The instruction set and the operation codes are

detailed in the instruction set table 3.

After the device is selected with CS

¯¯¯ going low the first

byte will be received. The part is accessed via the SI

pin, with data being clocked in on the rising edge of

SCK. The first byte contains one of the six op-codes

that define the operation to be performed.

RELIABILITY CHARACTERISTICS

Over recommended operating conditions unless otherwise stated.

Symbol

Parameter

Reference Test Method

Min

Typ

Max

Units

(1)

Endurance

MIL-STD-883, Test Method 1033

1,000,000

Cycles/Byte

TDR

(1)

Data Retention

MIL-STD-883, Test Method 1008

100

Years

(1)

ESD Susceptibility

MIL-STD-883, Test Method 3015

2000

Volts

(1)

Latch-Up

JEDEC Standard 17

100

mA

Notes:

(1) This parameter is tested initially and after a design or process change that affects the parameter.