MCP4251T-502E/SL Microchip Technology, MCP4251T-502E/SL Datasheet - Page 58
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MCP4251T-502E/SL
Manufacturer Part Number
MCP4251T-502E/SL
Description
IC DGTL POT 5K 2CH 14SOIC
Manufacturer
Microchip Technology
Datasheet
1.MCP4131-502EP.pdf
(88 pages)
Specifications of MCP4251T-502E/SL
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Taps
257
Resistance (ohms)
5K
Number Of Circuits
2
Temperature Coefficient
150 ppm/°C Typical
Memory Type
Volatile
Interface
SPI Serial
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Resistance In Ohms
5K
Number Of Pots
Dual
Taps Per Pot
256
Resistance
5 KOhms
Wiper Memory
Volatile
Digital Interface
Serial (SPI)
Operating Supply Voltage
2.5 V, 3.3 V, 5 V
Supply Current
1 mA
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.8 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MCP4251T-502-E/SL
MCP4251T-502-E/SLTR
MCP4251T-502-E/SLTR
MCP4251T-502E/SLTR
MCP4251T-502-E/SLTR
MCP4251T-502-E/SLTR
MCP4251T-502E/SLTR
MCP413X/415X/423X/425X
7.8.2
Continuous Decrements are possible only when writing
to the wiper registers.
Figure 7-9
for three continuous writes. The writes do not need to
be to the same volatile memory address.
When executing an continuous Decrement commands,
the selected wiper will be altered from n to n-1 for each
Decrement command received. The wiper value will
decrement from the wipers Full-Scale value (100h on
8-bit devices and 80h on 7-bit devices). Above the
wipers Full-Scale value (8-bit =101h to 1FFh,
7-bit = 81h to FFh), the decrement command is
disabled. If the Wiper register has a Zero Scale value
(000h), then the wiper value will not decrement. See
Table 7-4
Command vs. the current volatile wiper value.
FIGURE 7-9:
DS22060B-page 58
SDI
SDO
A
D
3
1
1
1
1
for additional information on the Decrement
Note 1: Only functions when writing the volatile wiper registers (AD3:AD0) 0h and 1h.
(DECR COMMAND (n-1) )
shows a continuous Decrement sequence
CONTINUOUS DECREMENTS
A
D
2
1
1
1
1
COMMAND BYTE
2: Valid Address/Command combination.
3: Invalid Address/Command combination.
4: If an Error Condition occurs (CMDERR = L), all following SDO bits will be low until the CMDERR
D
A
1
1
1
1
1
condition is cleared (the CS pin is forced to the inactive state).
D
A
0
1
1
1
1
Continuous Decrement Command - SDI and SDO States.
1
1
1
1
1
0
1 1* 1
1
1
1
X
0
1
1
X
0
1
1
D
A
3
1
0
1
1
(DECR COMMAND (n-1) )
D
A
2
1
0
1
1
COMMAND BYTE
D
A
1
1
0
1
1
A
D
0
1
0
1
1
1
1
0
1
1
0
1 1* 1
0
1
1
Decrement commands can be sent repeatedly without
raising CS until a desired condition is met. The value in
the Volatile Wiper register can be read using a Read
Command.
When executing a continuous command string, The
Decrement command can be followed by any other
valid command.
The wiper terminal will move after the command has
been received (8th clock).
After the wiper is decremented to the desired position,
the CS pin should be forced to V
“unexpected” transitions (on the SCK pin do not cause
the wiper setting to change). Driving the CS pin to V
should occur as soon as possible (within device
specifications) after the last desired decrement occurs.
X
0
0
1
X
0
0
1
D
A
3
1
0
0
1
(DECR COMMAND (n-1) )
A
D
2
1
0
0
1
COMMAND BYTE
A
D
1
1
0
0
1
A
D
0
1
0
0
1
© 2008 Microchip Technology Inc.
1
1
0
0
1
1 1* 1 Note 1, 2
1
0
0
0
X
0
0
0
IH
X
0 Note 3, 4
0 Note 3, 4
0 Note 3, 4
to ensure that
IH