CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1. Absolute linearity is utilized to determine actual wiper resistance vs expected resistance = (V
H(n)
(actual) - V
H(n)
(expected)) = ±1 Ml Maximum.
n = 1 .. 29 only.
2. Relative linearity is a measure of the error in step size between taps = V
H(n+1)
- [V
H(n)
+ Ml] = ±0.5 Ml, n = 1 .. 29 only.
3. 1 Ml = Minimum Increment = R
TOT
/31.
4. Typical values are for T
A
= +25°C and nominal supply voltage.
5. Limits established by characterization and are not production tested.
6. When performing multiple write operations, V
CC
must not decrease by more than 150mV from its initial value.
7. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.
Potentiometer Characteristics
Over recommended operating conditions, unless otherwise stated.
SYMBOL
R
TOT
PARAMETER
End-to-End Resistance
TEST CONDITIONS/NOTES
W option
U option
V
R
R
H
, R
L
Terminal Voltages
Power Rating
Noise
R
W
I
W
Wiper Resistance
Wiper Current
Resolution
Absolute Linearity (Note 1)
Relative Linearity (Note 2)
R
TOTAL
Temperature Coefficient
C
H
/C
L
/C
W
Potentiometer Capacitances
V
H(n)(actual)
- V
H(n)(expected)
V
H(n+1)
- [V
H(n) + MI
]
(Note 5)
See “Circuit #2 SPICE Macro Model” on
page 4
±35
10/10/25
R
TOTAL
=
50kΩ (Note 5)
Ref: 1kHz (Note 5)
((Note 5)
(Notes 5)
3
±1
±0.5
-120
1100
0.6
MIN
(Note 7)
9.375
37.5
0
TYP
(Note 4)
12.5
50
MAX
(Note 7)
15.625
62.5
V
CC
1
UNIT
kΩ
kΩ
V
mW
(Note 6)
dBV
(Note 6)
Ω
mA
%
MI
(Note 3)
MI
(Note 3)
ppm/°C
pF
(Note 5)
3
FN8188.2
February 1, 2008
X93256
DC Operating Characteristics
SYMBOL
I
CC1
PARAMETER
VCC Active Current (Increment)
Over recommended operating conditions, unless otherwise stated.
TEST CONDITIONS
CS = V
IL
, U/D = V
IL
or V
IH
and
INC = 0.4V @ max. t
CYC
V
CC
= 3V
CS = V
IL
, U/D = V
IL
or V
IH
and
INC = 0.4V @ max. t
CYC
V
CC
= 5V
I
CC2
VCC Active Current (Store)
(EEPROM Store)
CS = V
IH
, U/D = V
IL
or V
IH
and
INC = V
IH
@ max. t
WR
V
CC
= 3V
CS = V
IH
, U/D = V
IL
or V
IH
and
INC = V
IH
@ max. t
WR
V
CC
= 5V
I
SB
Standby Supply Current
CS = V
CC
- 0.3V, U/D and INC = V
SS
or
V
CC
- 0.3V V
CC
= 3V
CS = V
CC
- 0.3V, U/D and INC = V
SS
or
V
CC
- 0.3V V
CC
= 5V
I
LI
I
LI
I
LI
I
LI
V
IH
V
IL
C
IN
(Note 6)
CS input Leakage Current
CS input Leakage Current
CS input Leakage Current
INC, U/D Input Leakage Current
CS, INC, U/D input HIGH Voltage
CS, INC, U/D input LOW Voltage
CS, INC, U/D Input Capacitance
V
CC
= 3V, V
IN
= V
SS
, T
A
= +25°C,
f = 1MHz (Note 5)
V
IN
= V
CC
V
CC
= 3V, CS = 0
V
CC
= 5V, CS = 0
V
IN
= V
SS
to V
CC
V
CC
x 0.7
-0.5
60
120
100
200
MIN
(Note 7)
TYP
(Note 4)
50
200
MAX
(Note 7)
250
300
600
1400
1
4
±1
150
250
±1
V
CC
+ 0.5
V
CC
x 0.1
10
µA
µA
µA
µA
µA
µA
µA
µA
V
V
pF
UNIT
µA
Endurance and Data Retention
PARAMETER
Minimum endurance
Data retention
MIN
200,000
100
UNIT
Data changes per bit
Years
AC Conditions of Test
Input pulse levels
Input rise and fall times
Input reference levels
0V to 3V
10ns
1.5V
Test Circuit #1
TEST POINT
V
H
/R
H
Circuit #2 SPICE Macro Model
R
TOTAL
R
H
C
H
C
W
25pF
10pF
C
L
10pF
R
L
AC Operating Characteristics
Over recommended operating conditions, unless otherwise specified. In the table, CS, INC, U/D, R
H
and
R
L
are used to refer to either CS
1
or CS
2
, etc.
SYMBOL
t
Cl
t
lD
t
DI
t
lL
t
lH
CS to INC Setup
INC HIGH to U/D Change
U/D to INC Setup
INC LOW Period
INC HIGH Period
PARAMETER
MIN
(Note 7)
100
100
100
1
1
TYP
(Note 4)
MAX
(Note 7)
UNIT
ns
ns
ns
µs
µs
4
FN8188.2
February 1, 2008
X93256
AC Operating Characteristics
Over recommended operating conditions, unless otherwise specified. In the table, CS, INC, U/D, R
H
and
R
L
are used to refer to either CS
1
or CS
2
, etc.
(Continued)
SYMBOL
t
lC
t
CPH
t
CPH
t
CYC
t
R
, t
F
(Note 5)
t
R
V
CC
(Note 5)
t
WR
PARAMETER
INC Inactive to CS Inactive
CS Deselect Time (No store)
CS Deselect Time (Store)
INC Cycle Time
INC Input Rise and Fall time
VCC Power-up Rate
Store Cycle
0.2
5
MIN
(Note 7)
1
250
10
2
500
50
10
TYP
(Note 4)
MAX
(Note 7)
UNIT
µs
ns
ms
µs
µs
V/ms
ms
AC Timing
CS
t
CYC
t
CI
INC
t
IL
t
IH
t
IC
(STORE)
t
CPH
90%
10%
90%
t
ID
t
DI
t
F
t
R
U/D
Note: CS, INC, U/D, R
H
and R
L
are used to refer
to either CS
1
or CS
2
, etc.
Power-up and Power-down Requirements
There are no restrictions on the power-up or power-down
conditions of V
CC
and the voltages applied to the
potentiometer pins provided that V
CC
is always more
positive than or equal to V
H
and V
L
, i.e., V
CC
≥
V
H,
V
L
. The
V
CC
ramp rate specification is always in effect.
Up/Down (U/D)
The U/D input controls the direction of a single
potentiometer’s wiper movement and whether the counter is
incremented or decremented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC will
move the wiper and either increment or decrement the
pertaining potentiometer’s counter in the direction indicated
by the logic level on the pertaining potentiometer’s U/D
input.
Pin Descriptions
In the text, CS, INC, U/D, R
H
, R
W
, and R
L
are used to refer
to either CS
1
or CS
2
, etc. Note: These signals can be
applied independently or at the same time.
R
H
and R
L
The R
H
and R
L
pins of the X93256 are equivalent to the
fixed terminals of a mechanical potentiometer. The minimum
voltage is V
SS
and the maximum is V
CC
. The terminology of
R
H
and R
L
references the relative position of the terminal in
relation to wiper movement direction selected by the U/D
input per potentiometer.
Chip Select (CS)
A potentiometer is selected when the pertaining CS input is
LOW. Its current counter value is stored in nonvolatile memory
when the pertaining CS is returned HIGH while the pertaining
INC input is also HIGH. After the store operation is complete
the affected potentiometer will be placed in the low power
standby mode until the potentiometer is selected once again.
R
W
The R
W
pin of the X93256 is the wiper terminal of the
potentiometer, which is equivalent to the movable terminal of
a mechanical potentiometer.
5
Principles of Operation
There are multiple sections for each potentiometer in the
X93256: an input control, a counter and decode section; the
nonvolatile memory; and a resistor array. Each input control
Due to project requirements, the single-port network transformer H1102NL needs to be replaced with a four-port transformer. Pulse's HX1259NL was selected. The internal structure of H1102NL is as follo...
[Ask if you don't understand] Part of the block diagram of the servo motor position control [1] How to understand position feedforward? Is the following understanding OK? For example, the motor needs ...
Well, maybe you know, I had a lot of trouble with M25P80. I think I wrote the timing right. I just don't know how to operate FLASH chips. For example, I don't understand what it means to erase before ...
Generally speaking, when the phone is powered on without a SIM card inserted, a dialog box prompting "No SIM card" will appear. If no operation is performed, this dialog box will not close. However, i...
[size=4][font=微软雅黑]Let’s first announce the participating projects: First is [color=#000]cz380921140’s project:[/color][/font][/size][b][font=微软雅黑][size=4]【Participating】Running Snake Based on LaunchP...
[i=s] This post was last edited by Xiaoan on 2014-8-1 17:09 [/i] Don't trust the oscilloscope too much. I thought it should output the yellow block (the sunken part in the picture, composed of thousan...
introduction
Since the beginning of the 21st century, the world of information has changed rapidly. Maybe a high-tech product will be released today and a better similar product will be releas...[Details]
1. Introduction
This design was made for participating in an electronic design competition. It effectively solved the problem of the operation and control of an electric car on a seesaw. The s...[Details]
With the advent of increasingly powerful processors, image sensors, memory, and other semiconductor devices, as well as the algorithms that enable them, computer vision can be implemented in a wide...[Details]
A standard cell
is an electrochemical
cell
used as a voltage reference standard in many electrical standards laboratories
. If properly maintained, standard cells are very stable. The ...[Details]
1. With the development of modern industry and the continuous improvement of automation, some medium and large control systems have been greatly facilitated, which not only makes control easier, bu...[Details]
The automotive lighting and signal control system is responsible for controlling the vehicle's lighting, signal lights, electric horns, reversing and brake buzzers. Traditional automotive lighting...[Details]
The typical fault troubleshooting listed below is for reference of maintenance personnel.
When the computer is turned on, the indicator light is off and there is no screen display
Mainte...[Details]
The potentiometer is an adjustable electronic component. The main functions of the potentiometer in the circuit are as follows:
1. Used as a voltage divider
A potentiometer is a continuou...[Details]
As a simple and practical input device, buttons have been used in various microcontroller application systems and are ubiquitous. However, the buttons used in different practical occasions are also...[Details]
As people's requirements for safety and comfort in the process of driving cars continue to increase, automotive radars are widely used in the car's adaptive cruise system, collision avoidance syste...[Details]
The serial interface real-time clock chip DS1302 launched by Dallas Company in the United States can trickle charge the backup battery of the clock chip. Due to the main features of the chip such a...[Details]
introduction
LEDs continue to gain popularity in automotive applications, thanks to their long lifespan and the flexibility they offer for body styling and interior design. Some may be surpris...[Details]
Every time I go home and walk up the stairs, I am always scared. The corridor lights are often broken, and no one changes the bulbs, or they are not smart enough and need to be operated manually. E...[Details]
At present, with the diversification of portable products and the almost harsh requirements for audio and video parts, the power consumption requirements of the whole machine have been raised to a ...[Details]
The capacity of a battery depends on the amount of charge and discharge, in addition to some factors of the battery itself. Obviously, if the charge and discharge of the battery can be recorded all...[Details]
PCB Design
京公网安备 11010802033920号
EEWORLD
