Datasheet X9313ZMM, X9313ZMI3, X9313ZMI, X9313ZM3, X9313ZM Datasheet (XICOR)

APPLICATION NOTES

AVAILABLE

AN42 • AN44–48 • AN50 • AN52 • AN53 • AN71 • AN73

Terminal Voltage ±5V, 32 Taps

X9313

E2POT™ Nonvolatile Digital Potentiometer

X9313

FEATURES

• Low Power CMOS

—V
—Active Current, 3mA Max
—Standby Current, 500µA Max

= 3V to 5.5V

CC

• 31 Resistive Elements

—Temperature Compensated
—±20% End to End Resistance Range
— –5V to +5V Range

• 32 Wiper Tap Points

—Wiper Positioned via Three-Wire Interface
—Similar to TTL Up/Down Counter
—Wiper Position Stored in Nonvolatile

Memory and Recalled on Power-Up

• 100 Year Wiper Position Data Retention

• X9313Z = 1KΩ

• X9313W = 10KΩ

• Packages

—8-Lead MSOP
—8-Lead PDIP
—8-Lead SOIC

FUNCTIONAL DIAGRAM

DESCRIPTION

The Xicor X9313 is a solid state nonvolatile potentiom­eter and is ideal for digitally controlled resistance
trimming.

The X9313 is a resistor array composed of 31 resistive
elements. Between each element and at either end are
tap points accessible to the wiper element. The position of
the wiper element is controlled by the CS, U/D, and INC
inputs. The position of the wiper can be stored in nonvola­tile memory and then be recalled upon a subsequent
power-up operation.

The resolution of the X9313 is equal to the maximum
resistance value divided by 31. As an example, for the
X9313W (10KΩ) each tap point represents 323Ω.

All Xicor nonvolatile memories are designed and tested
for applications requiring extended endurance and data
retention.

U/D
INC

CS

V

CC

GND

E2POT™ is a trademark of Xicor, Inc.

©Xicor, Inc. 1994, 1995, 1996 Patents Pending Characteristics subject to change without notice
3866-1.5 6/12/96 T5/C1/D8 NS

5-BIT
UP/DOWN
COUNTER

5-BIT

NONVOLATILE

MEMORY

STORE AND

RECALL

CONTROL

CIRCUITRY

ONE

OF

THIRTY -

TWO

DECODER

1

31

30

29

28

V

H

TRANSFER

GATES

2

1

0

RESISTOR

ARRAY

V

L

V

W

3866 FHD F01

X9313

PIN DESCRIPTIONS
VH and V

L

The high (VH) and low (VL) terminals of the X9313 are
equivalent to the fixed terminals of a mechanical potenti­ometer. The minimum voltage is –5V and the maximum is
+5V. It should be noted that the terminology of VL and V
references the relative position of the terminal in relation
to wiper movement direction selected by the U/D input and
not the voltage potential on the terminal.

V

W

Vw is the wiper terminal, equivalent to the movable
terminal of a mechanical potentiometer. The position
of the wiper within the array is determined by the
control inputs. The wiper terminal series resistance is
typically 40Ω.

Up/Down (U/D)

The U/D input controls the direction of the 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 counter in the direction indicated by the logic level on
the U/D input.

Chip Select (CS)

The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory
when CS is returned HIGH while the INC input is also
HIGH. After the store operation is complete the X9313
will be placed in the low power standby mode until the
device is selected once again.

PIN CONFIGURATION

H

PIN NAMES

Symbol Description

V

H

V

W

V

L

V

SS

V

CC

U/D Up/Down Input

INC Increment Input
CS Chip Select Input

INC
U/D

V

V

V

V
SS

V
SS

V

H

H

W

L

8-LEAD DIP/SOIC

1
2

X9313

3
4

8-LEAD MSOP

1
2

X9313

3
4

8
7
6
5

8
7
6
5

High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage

V

CC

CS
V

L

V

W

U/D
INC
V

CC

CS

3866 ILL F02.2

3866 PGM T01

2

X9313

DEVICE OPERATION

There are three sections of the X9313: the input control,
counter and decode section; the nonvolatile memory;
and the resistor array. The input control section
operates just like an up/down counter. The output of this
counter is decoded to turn on a single electronic switch
connecting a point on the resistor array to the wiper
output. Under the proper conditions the contents of the
counter can be stored in nonvolatile memory and
retained for future use. The resistor array is comprised
of 31 individual resistors connected in series. At either
end of the array and between each resistor is an
electronic switch that transfers the potential at that point
to the wiper.

The INC, U/D and CS inputs control the movement of the
wiper along the resistor array. With CS set LOW the
X9313 is selected and enabled to respond to the
U/D and INC inputs. HIGH to LOW transitions on INC will
increment or decrement (depending on the state of the
U/D input) a seven bit counter. The output of this counter
is decoded to select one of thirty two wiper positions
along the resistive array.

The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap around
when clocked to either extreme.

The value of the counter is stored in nonvolatile memory
whenever CS transistions HIGH while the INC input is
also HIGH.

When the X9313 is powered-down, the last counter
position stored will be maintained in the nonvolatile
memory. When power is restored, the contents of the
memory are recalled and the counter is reset to the value
last stored.

Operation Notes

The system may select the X9313, move the wiper and
deselect the device without having to store the latest
wiper position in nonvolatile memory. The wiper move­ment is performed as described above; once the new
position is reached, the system would the keep INC
LOW while taking CS HIGH. The new wiper position
would be maintained until changed by the system or
until a power-up/down cycle recalled the previously
stored data.

This would allow the system to always power-up to a
preset value stored in nonvolatile memory; then during
system operation minor adjustments could be made.
The adjustments might be based on user preference,
system parameter changes due to temperature drift,
etc...

The state of U/D may be changed while CS remains
LOW. This allows the host system to enable the X9313
and then move the wiper up and down until the proper
trim is attained.

TIW/R

TOTAL

The electronic switches on the X9313 operate in a
“make before break” mode when the wiper changes tap
positions. If the wiper is moved several positions mul­tiple taps are connected to the wiper for tIW (INC to V
change). The R

value for the device can tempo-

TOTAL

rarily be reduced by a significant amount if the wiper is
moved several positions.

R

with VCC Removed

TOTAL

The end to end resistance of the array will fluctuate once
VCC is removed.

SYMBOL TABLE

W

WAVEFORM

3

INPUTS

Must be
steady

May change
from LOW
to HIGH

May change
from HIGH
to LOW

Don’t Care:
Changes
Allowed

N/A

OUTPUTS

Will be
steady

Will change
from LOW
to HIGH

Will change
from HIGH
to LOW

Changing:
State Not
Known

Center Line
is High
Impedance

X9313

ABSOLUTE MAXIMUM RATINGS*

Temperature under Bias .................. –65°C to +135°C

Storage Temperature ....................... –65°C to +150°C

Voltage on CS, INC, U/D and V

with Respect to V

SS

Voltage on VH and VL Referenced to V

CC

...............................

SS

–1V to +7V

∆V = |VH–VL|

X9313Z .............................................................4V

X9313W, X9313U, X9313T ............................10V

*COMMENT

Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and the functional operation
of the device at these or any other conditions above
those listed in the operational sections of this specifica­tion is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device

reliability.

Lead Temperature (Soldering 10 seconds)....... 300°C

Wiper Current.....................................................±1mA

ANALOG CHARACTERISTICS
Electrical Characteristics

End-to-End Resistance Tolerance ..................... ±20%

Power Rating at 25°C

X9313Z .......................................................16mW

X9313W...................................................... 10mW

Wiper Current............................................ ±1mA Max.

Typical Wiper Resistance......................... 40Ω at 1mA

Typical Noise..........................< –120dB/ Hz Ref: 1V

Temperature Coefficient

(–40°C to +85°C)

X9313Z.......................................+600 ppm/°C Typical

X9313W, X9313U, X9313T........+300 ppm/°C Typical

Ratiometric Temperature Coefficient ............ ±20 ppm

Wiper Adjustability

Unlimited Wiper Adjustment

Wiper Position Store Operations ............... 10,000

Resolution

Resistance ............................................................. 3%

Linearity

Absolute Linearity
Relative Linearity

(1)

........................................

(3)

..................................... ±0.2 Ml

±1.0 Ml

(2)
(2)

Data Changes

Physical Characteristics

Marking Includes

Manufacturer’s Trademark
Resistance Value or Code
Date Code

Test Circuit #1 Test Circuit #2

(Non-Store operation)

V

H

TEST POINT

V

W

V

L

3866 FHD F04 3866 FHD F05

Notes: (1) Absolute Linearity is utilized to determine actual wiper voltage versus expected voltage

= (V

(actual) – V

w(n)

(2) 1 Ml = Minimum Increment = R
(3) Relative Linearity is a measure of the error in step size between taps = V

(expected)) = ±1 Ml Maximum.

w(n)

TOT

/31.

4

W(n+1)

– [V

w(n)

V

H

TEST POINT

V

W

FORCE

V

L

+ Ml] = +0.2 Ml.

CURRENT

X9313

RECOMMENDED OPERATING CONDITIONS

Temperature Min. Max.

Commercial 0°C +70°C
Industrial –40°C +85°C
Military –55°C +125°C

3866 PGM T03.1

Supply Voltage Limits

X9313 5V ±10%

X9313-3 3V to 5.5V

3866 PGM T04.1

D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.)

Limits

Symbol Parameter Min. Typ.

I

I

CC

SB

VCC Active Current 1 3 mA CS = VIL, U/D = VIL or VIH and

Standby Supply Current 200 500 µA CS = VCC – 0.3V, U/D and INC =

(4)

Max. Units Test Conditions

INC = 0.4V/2.4V @ max. t

CYC

VSS or VCC – 0.3V

I

LI

CS, INC, U/D Input ±10 µAVIN = V

SS

to V

CC

Leakage Current

V

IH

CS, INC, U/D Input 2 VCC + 1 V
HIGH Voltage

V

IL

CS, INC, U/D Input –1 0.8 V
LOW Voltage

R

W

V

VH

V

VL

C

IN

Wiper Resistence 40 100 Ω Max. Wiper Current ±1mA
VH Terminal Voltage –5 +5 V
VL Terminal Voltage –5 +5 V

(5)

CS, INC, U/D Input 10 pF VCC = 5V, VIN = VSS,
Capacitance TA = 25°C, f = 1MHz

3866 PGM T05.3

STANDARD PARTS

Part Number Maximum Resistance Wiper Increments Minimum Resistance

X9313Z 1KΩ 32.3Ω 40Ω

X9313W 10KΩ 323Ω 40Ω

X9313U 50KΩ 2381Ω 40Ω
X9313T 100KΩ 3226Ω 40Ω

Notes: (4) Typical values are for TA = 25°C and nominal supply voltage.

(5) This parameter is periodically sampled and not 100% tested.

5

3866 PGM T08.1

X9313

A.C. CONDITIONS OF TEST

Input Pulse Levels 0V to 3V
Input Rise and Fall Times 10ns
Input Reference Levels 1.5V

3866 PGM T05.1

MODE SELECTION

CS INC U/D Mode

L H Wiper Up
L L Wiper Down

H X Store Wiper Position

H X X Standby

L X No Store, Return to

Standby

3866 PGM T06

A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified)

Limits

Symbol Parameter Min. Typ.

t

Cl

t

lD

t

DI

t

lL

t

lH

t

lC

t

CPH

t

IW

t

CYC

t

R, tF

t

PU

tR V

(7)

(7)

CC

(7)

CS to INC Setup 100 ns
INC HIGH to U/D Change 100 ns
U/D to INC Setup 2.9 µs
INC LOW Period 1 µs
INC HIGH Period 1 µs
INC Inactive to CS Inactive 1 µs
CS Deselect Time 20 ms
INC to Vw Change 100 500 µs
INC Cycle Time 4 µs
INC Input Rise and Fall Time 500 µs

Power up to Wiper Stable 500 µs
VCC Power-up Rate 0.2 50 mV/µs

(6)

Max. Units

3866 PGM T07.3

A.C. Timing

CS

t

CYC

t

CI

INC

U/D

t

IW

V

W

Notes: (6) Typical values are for TA = 25°C and nominal supply voltage.

(7) This parameter is periodically sampled and not 100% tested.
(8) MI in the A.C. timing diagram refers to the minimum incremental change in the VW output due to a change in the wiper position.

t

IL

t

ID

t

IH

t

IC

t

DI

MI

6

(8)

t

CPH

t

F

90% 90%

10%

t

R

3866 FHD F03

X9313

PACKAGING INFORMATION

8-LEAD MINIATURE SMALL OUTLINE GULL WING PACKAGE TYPE M

0.012 + 0.006 / -0.002
(0.30 + 0.15 / -0.05)

0.118 ± 0.002
(3.00 ± 0.05)

0.030 (0.76)

0.118 ± 0.002
(3.00 ± 0.05)

0.0256 (0.65) TYP

R 0.014 (0.36)

0.0216 (0.55)

0.036 (0.91)

0.032 (0.81)

0.040 ± 0.002
(1.02 ± 0.05)

0.007 (0.18)

0.005 (0.13)

NOTE:

1. ALL DIMENSIONS IN INCHES AND (MILLIMETERS)

7° TYP

0.008 (0.20)

0.004 (0.10)

0.150 (3.81)

0.193 (4.90)

REF.
REF.

3003 ILL 01

7

X9313

PACKAGING INFORMATION

8-LEAD PLASTIC DUAL IN-LINE PACKAGE TYPE P

0.430 (10.92)

0.360 (9.14)

0.260 (6.60)

0.240 (6.10)

PIN 1 INDEX

PIN 1

0.300

(7.62) REF.

0.060 (1.52)

0.020 (0.51)

HALF SHOULDER WIDTH ON

ALL END PINS OPTIONAL

SEATING

PLANE

0.150 (3.81)

0.125 (3.18)

0.015 (0.38)
MAX.

TYP. 0.010 (0.25)

0.110 (2.79)

0.090 (2.29)

0.325 (8.25)

0.300 (7.62)

0.065 (1.65)

0.045 (1.14)

0.020 (0.51)

0.016 (0.41)

NOTE:

1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)

2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH

0.145 (3.68)

0.128 (3.25)

0.025 (0.64)

0.015 (0.38)

0°

15°

3926 FHD F01

8

X9313

PACKAGING INFORMATION

8-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S

PIN 1 INDEX

(4X) 7°

0.050 (1.27)

0.010 (0.25)

0.020 (0.50)

X 45°

PIN 1

0.014 (0.35)

0.019 (0.49)

0.188 (4.78)

0.197 (5.00)

0.150 (3.80)

0.158 (4.00)

0.004 (0.19)

0.010 (0.25)

0.228 (5.80)

0.244 (6.20)

0.053 (1.35)

0.069 (1.75)

0.050" TYPICAL

0° – 8°

0.0075 (0.19)

0.010 (0.25)

0.016 (0.410)

0.037 (0.937)

0.250"

FOOTPRINT

NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)

3926 FHD F22.1

9

0.050"
TYPICAL

0.030"

TYPICAL

8 PLACES

X9313

ORDERING INFORMATION

X9313X X X

X

VCC Range

Blank = 4.5V to 5.5V
3 = 3V to 5.5V

Temperature Range

Blank = Commercial = 0°C to +70°C
I = Industrial = –40°C to +85°C
M = Military = –55°C to +125°C

Package

M = 8-Lead MSOP
P = 8-Lead Plastic DIP
S = 8-Lead SOIC

End to End Resistance

Z = 1KΩ
W = 10KΩ
U = 50KΩ
T = 100KΩ

LIMITED WARRANTY

Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty,
express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement.
Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and
prices at any time and without notice.

Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, licenses are
implied.

U.S. PATENTS

Xicor products are covered by one or more of the following U.S. Patents: 4,263,664; 4,274,012; 4,300,212; 4,314,265; 4,326,134; 4,393,481; 4,404,475;
4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846; 4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829, 482; 4,874, 967; 4,883, 976. Foreign patents and
additional patents pending.

LIFE RELATED POLICY

In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error
detection and correction, redundancy and back-up features to prevent such an occurence.

Xicor's products are not authorized for use in critical components in life support devices or systems.

1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose
failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant
injury to the user.

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or effectiveness.

10