X9251US24-2.7T1 Intersil, X9251US24-2.7T1 Datasheet - Page 11

• Manufacturer Part Number: X9251US24-2.7T1
• Description: IC XDCP QUAD 256TAP 50K 24-SOIC
• Manufacturer: Intersil
• Series: XDCP™r

Specifications of X9251US24-2.7T1

• Taps: 256
• Resistance (ohms): 50K
• Number Of Circuits: 4
• Temperature Coefficient: 300 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Resistance In Ohms: 50K
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
Transfer Wiper Counter Register (WCR) to Data Register (DR)
Transfer Data Register (DR) to Wiper Counter Register (WCR)
Increment/Decrement Wiper Counter Register (WCR)
Read Status Register (SR)
NOTES:
1. “A1 ~ A0”: stands for the device addresses sent by the master.
2. WPx refers to wiper position data in the Counter Register
3. “I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
4. “D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
Falling
Falling
Falling
Falling
Falling
Edge
Edge
Edge
Edge
Edge
CS
CS
CS
CS
CS
0
0
0
0
0
Device Type
Device Type
Device Type
Device Type
Device Type
Identifier
Identifier
Identifier
Identifier
Identifier
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
Addresses
Addresses
Addresses
Addresses
Addresses
0
0
11
Device
Device
0
0
0
Device
Device
Device
A1
A1 A0
A1
A1 A0
A1
A0
A0
A0
1
1
0
1
Instruction
Instruction
0
Instruction
Instruction
Opcode
Opcode
Instruction
Opcode
Opcode
0
1
Opcode
1
0
1
0
1
0
1
0
0
0
1
0
1
RB
RB
RB
X
0
DR and WCR
Addresses
Addresses
DR and WCR
Addresses
Addresses
Addresses
X
RA
WCR
X9251
WCR
RA
0
DR
RA
0
0
0
0
0
0
1
0
0
0
I/D
0
Rising
Edge
CS
Rising
Edge
Rising
0
CS
Edge
CS
I/D
(Sent by X9251 on SO)
(Sent by Master on SI)
Increment/Decrement
0
.
Data Byte
0
HIGH-VOLTAGE
WRITE CYCLE
HIGH-VOLTAGE
WRITE CYCLE
.
0
.
0
.
0
I/D
WIP
I/D
Rising
Edge
Rising
CS
Edge
CS
April 13, 2007
FN8166.5