DS1809U-050 datasheet, PDF - EEWORLD Datasheet

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DS1809U-050: DescriptionSPECIALTY ANALOG CIRCUIT, PDSO8, 0.118 INCH, MICRO, SOP-8; CategoryAnalog mixed-signal IC The signal circuit; File Size781KB，10 Pages; ManufacturerRochester Electronics; Websitehttps://www.rocelec.com/

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DS1809U-050 Overview

SPECIALTY ANALOG CIRCUIT, PDSO8, 0.118 INCH, MICRO, SOP-8

DS1809U-050 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Rochester Electronics
Parts packaging code	SOIC
package instruction	TSSOP,
Contacts	8
Reach Compliance Code	unknown
Is Samacsys	N
Analog Integrated Circuits - Other Types	ANALOG CIRCUIT
JESD-30 code	S-PDSO-G8
JESD-609 code	e0
length	3 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
Certification status	COMMERCIAL
Maximum seat height	1.1 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	4.5 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	20
width	3 mm
Base Number Matches	1

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DS1809

The DS1809 is available in standard 10 k, 50 k, and 100 kresistor versions. The DS1809 is

provided as an industrial temperature grade part only. Available packaging for the DS1809 include an 8-

lead (300-mil) DIP an 8-lead (150-mil) SOIC, and an 8-lead (118-mil)

SOP.

BLOCK DIAGRAM

Figure 1

OPERATION

The DS1809 Dallastat is a digitally controlled, nonvolatile potentiometer. A block diagram of the

DS1809 is shown in Figure 1. The DS1809 is a linear potentiometer providing 64-uniform wiper

positions over the entire resistor range including the end-terminals. All three potentiometer terminals of

the device are accessible. These terminals include R

, R

, and R

. R

and R

are the end-terminals of the

potentiometer. These terminals will have a constant resistance between them as defined by the

potentiometer value chosen: 10 k, 50 k, or the 100 kversion. Functionally, R

and R

are

interchangeable. The wiper terminal, R

, is the multiplexed terminal and can be set to one of the 64 total

positions that exist on the resistor ladder including the R

and R

terminals.

Control of the wiper (R

) position setting is accomplished via the two inputs UC and DC. The UC and

DC control inputs, when active, determine the direction on the resistor array that the wiper position will

move. The UC (up control) control input is used to move the wiper position towards the R

terminal. The

DC (down control) control input is used to move wiper position towards the R

terminal.

The control inputs UC and DC are active low inputs that interpret input pulse widths as the means of

controlling wiper movement. Internally, these inputs are pulled up to V

via a 100 kresistance. A

transition from a high-to-low on these inputs is considered the beginning of pulse input activity.

A single pulse on the UC or DC input is defined as being greater than 1 millisecond but lasting no longer

that ½ second. This type pulse input will cause the wiper position of the Dallastat to move one position.

Multiple pulse inputs (repetitive pulse inputs) can be used to step through each wiper position of the

device. The requirement for a repetitive pulse train on the UC or DC inputs is that pulses must be

separated by a minimum high time of 1 millisecond. If this is not the case the Dallastat will ignore that

pulse input.

A continuous pulse input (“push and hold”) is defined as lasting longer that ½ second. A continuous pulse

input will cause the wiper position to move one position every 100 milliseconds following the initial ½-

2 of 9

DS1809

second hold time. The total time to transcend the entire potentiometer given a continuous pulse input is

provided by the equation:

½(second) + 62 X 100 ms = 6.7 (seconds)

If the wiper position of the DS1809 is incremented to an end-position, it will stay at that position until the

device receives an opposite direction input pulse command over the UC or DC inputs. For example, if the

wiper position is incremented to the R

terminal using the UC input control, it will stay at that position

until UC is first deactivated, and then the DC input is activated to move the wiper position towards the R

terminal.

The UC and DC control inputs are designed to support simple pushbutton inputs or CPU generated

inputs. Figure 2 illustrates the requirements for pushbutton generated controls. For manual pushbutton

controls all that is required are the desired pushbuttons to implement contact closure. No external

debounce or timing circuitry is needed to support the pushbutton operation.

Applications using CPU generated controls must power the UC and DC control pins in a high state to

avoid any inadvertent wiper position movement. To help prevent inadvertent wiper position movement

during a power-up, the DS1809 locks out the control port inputs for a minimum time of 10 ms.

WIPER STORAGE

As stated earlier, the DS1809 provides for two methods of nonvolatile wiper storage using internal

EEPROM memory cells. These two methods include an autostore configuration and a command initiated

storage operation, both of which utilize the STR input pin. The EEPROM cell array of the DS1809 is

designed to accept greater than 50k writes.

AUTOSTORAGE

The autostore configuration is designed to provide wiper position storage as the part powers down;

writing the current wiper position into memory. The configuration for initiating the automatic storage

capability of the DS1809 is shown in Figure 3. As shown in this configuration, two external devices are

required to insure proper wiper storage. This includes a Schottky diode and a 10-uf capacitor. The

automatic store configuration will cause the DS1809 to initiate storage of wiper position when power

) to the device is removed. The 10-uF capacitor and Schottky diode are used to provide supplemental

power for wiper storage.

COMMAND-INITIATED WIPER STORAGE

The DS1809 will also support a command-initiated wiper storage operation during powered conditions.

For command initiated storage the STR pin should be held in a low state on power-up; otherwise the part

will assume an autostore configuration. As shown in Figure 5, a low-to-high pulse lasting at least 1

s

the STR input will cause the DS1809 to initiate the storage of the current wiper position into EEPROM

when V

is present.

3 of 9

DS1809U-050 Related Products

	DS1809U-050	DS1809-010	DS1809U-010	DS1809U-100	DS1809Z-010	RNC50J2943BRB14	DS1809Z-100	DS1809-050	DS1809-100
Description	SPECIALTY ANALOG CIRCUIT, PDSO8, 0.118 INCH, MICRO, SOP-8	SPECIALTY ANALOG CIRCUIT, PDIP8, 0.300 INCH, PLASTIC, DIP-8	SPECIALTY ANALOG CIRCUIT, PDSO8, 0.118 INCH, MICRO, SOP-8	SPECIALTY ANALOG CIRCUIT, PDSO8, 0.118 INCH, MICRO, SOP-8	SPECIALTY ANALOG CIRCUIT, PDSO8, 0.150 INCH, SOIC-8	RESISTOR, METAL FILM, 0.05 W, 0.1 %, 25 ppm, 294000 ohm, THROUGH HOLE MOUNT, AXIAL LEADED	SPECIALTY ANALOG CIRCUIT, PDSO8, 0.150 INCH, SOIC-8	SPECIALTY ANALOG CIRCUIT, PDIP8, 0.300 INCH, PLASTIC, DIP-8	SPECIALTY ANALOG CIRCUIT, PDIP8, 0.300 INCH, PLASTIC, DIP-8
Is it lead-free?	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible
package instruction	TSSOP,	DIP,	TSSOP,	TSSOP,	SOP,	Axial,	SOP,	DIP,	DIP,
Reach Compliance Code	unknown	unknow	unknown	unknown	unknown	unknown	unknown	unknown	unknown
JESD-609 code	e0	e0	e0	e0	e0	e0	e0	e0	e0
Number of terminals	8	8	8	8	8	2	8	8	8
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	175 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-65 °C	-40 °C	-40 °C	-40 °C
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	IN-LINE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE	Axial	SMALL OUTLINE	IN-LINE	IN-LINE
surface mount	YES	NO	YES	YES	YES	NO	YES	NO	NO
Terminal surface	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	Tin/Lead (Sn/Pb)	TIN LEAD	TIN LEAD	TIN LEAD
Maker	Rochester Electronics	-	Rochester Electronics	Rochester Electronics	Rochester Electronics	-	Rochester Electronics	Rochester Electronics	Rochester Electronics
Parts packaging code	SOIC	DIP	SOIC	SOIC	SOIC	-	SOIC	DIP	DIP
Contacts	8	8	8	8	8	-	8	8	8
Is Samacsys	N	-	N	N	N	-	N	-	-
Analog Integrated Circuits - Other Types	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	-	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT
JESD-30 code	S-PDSO-G8	R-PDIP-T8	S-PDSO-G8	S-PDSO-G8	R-PDSO-G8	-	R-PDSO-G8	R-PDIP-T8	R-PDIP-T8
length	3 mm	9.375 mm	3 mm	3 mm	4.9 mm	-	4.9 mm	9.375 mm	9.375 mm
Humidity sensitivity level	1	1	1	1	1	-	1	1	1
Number of functions	1	1	1	1	1	-	1	1	1
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	TSSOP	DIP	TSSOP	TSSOP	SOP	-	SOP	DIP	DIP
Package shape	SQUARE	RECTANGULAR	SQUARE	SQUARE	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR
Peak Reflow Temperature (Celsius)	240	240	240	240	245	-	245	240	240
Certification status	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	-	COMMERCIAL	COMMERCIAL	COMMERCIAL
Maximum seat height	1.1 mm	4.572 mm	1.1 mm	1.1 mm	1.75 mm	-	1.75 mm	4.572 mm	4.572 mm
Maximum supply voltage (Vsup)	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	-	5.5 V	5.5 V	5.5 V
Minimum supply voltage (Vsup)	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	-	4.5 V	4.5 V	4.5 V
Nominal supply voltage (Vsup)	5 V	5 V	5 V	5 V	5 V	-	5 V	5 V	5 V
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	-	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	GULL WING	THROUGH-HOLE	GULL WING	GULL WING	GULL WING	-	GULL WING	THROUGH-HOLE	THROUGH-HOLE
Terminal pitch	0.65 mm	2.54 mm	0.65 mm	0.65 mm	1.27 mm	-	1.27 mm	2.54 mm	2.54 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	-	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	20	20	20	20	NOT SPECIFIED	-	NOT SPECIFIED	20	20
width	3 mm	7.62 mm	3 mm	3 mm	3.9 mm	-	3.9 mm	7.62 mm	7.62 mm
Base Number Matches	1	1	1	1	1	-	1	-	-

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