CAT5251YI-00 ON Semiconductor, CAT5251YI-00 Datasheet - Page 3

• Manufacturer Part Number: CAT5251YI-00
• Manufacturer: ON Semiconductor

Specifications of CAT5251YI-00

• Number Of Elements: 4
• # Of Taps: 256
• Resistance (max): 100KOhm
• Power Supply Requirement: Single
• Interface Type: Serial (SPI)
• Single Supply Voltage (typ): 3.3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (min): 2.5V
• Single Supply Voltage (max): 6V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 24
• Package Type: TSSOP
• Lead Free Status / Rohs Status: Compliant

SERIAL BUS PROTOCOL
The
transmission protocol. The synchronous Serial
Peripheral Interface (SPI) helps the CAT5251 to
interface directly with many of today's popular
microcontrollers. The CAT5251 contains an 8-bit
instruction register. The instruction set and the
operation codes are detailed in Table 3, Instruction
Set on page 8.
After the device is selected with CS
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.
ABSOLUTE MAXIMUM RATINGS
Recommended Operating Conditions
V
Notes:
(1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings
(2) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20ns. Maximum DC
(3) Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to V
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
Parameter
Temperature Under Bias
Storage Temperature
Voltage on any Pin with Respect to V
V
Package Power Dissipation Capability (T
Lead Soldering Temperature (10 s)
Wiper Current
Parameter
Operating Ambient Temperature (Industrial)
CC
CC
= +2.5 V to +6 V
only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this
specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.
voltage on output pins is V
with Respect to Ground
CAT5251
supports
CC
+0.5V, which may overshoot to V
the
¯¯¯ going low the
SPI
SS
(2)(3)
A
bus
(1)
= 25°C)
data
CC
+2.0V for periods of less than 20ns.
3
-2.0 to +V
DEVICE OPERATION
The CAT5251 is four resistor arrays integrated with an
SPI serial interface logic, four 8-bit wiper control
registers and sixteen 8-bit, non-volatile memory data
registers. Each resistor array contains 255 separate
resistive elements connected in series. The physical
ends of each array are equivalent to the fixed terminals
of a mechanical potentiometer (R
are symmetrical and may be interchanged. The tap
positions between and at the ends of the series
resistors are connected to the output wiper terminals
(R
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.
-2.0 to +7.0
-55 to +125
-65 to +150
-40 to +85
W
Ratings
Ratings
) by a CMOS transistor switch. Only one tap point
300
1.0
±6
CC
+2.0
Units
Units
mA
°C
°C
°C
°C
W
V
V
CC
+ 1V.
H
and R
Doc. No. MD-2017 Rev. H
L
). R
CAT5251
H
and R
L