Rainbow-electronics DS1869 Instrukcja Użytkownika Pobierz pdf (Strona 1)

1 of 8 112099

FEATURES

 Replaces mechanical variable resistors

 Operates from 3V or 5V supplies

 Electronic interface provided for digital as

well as manual control

 Internal pull-ups with debounce for easy

interfacing to mechanical push buttons

 Wiper position is maintained in the absence of

power

 Low cost alternative to mechanical controls

 Applications include volume, tone, contrast,

brightness, and dimmer control

 8-pin SOIC and 8-pin DIP packages are

available

 Standard resistance values for Dallastat

- DS1869-10 ~ 10 kΩ

- DS1869-50 ~ 50 kΩ

- DS1869-100 ~ 100 kΩ

 Operating temperature range:

- Industrial: -40°C to +85°C

 3V to 8V differential supply operational range

PIN ASSIGNMENT

PIN DESCRIPTION

- High Terminal of Potentiometer

- Wiper Terminal of Potentiometer

- Low Terminal of Potentiometer

-V, +V - Voltage Supply Inputs

UC - Up Contact Input

D - Digital Input

DC - Down Contact Input

DESCRIPTION

The DS1869 Dallastat

is a digital rheostat or potentiometer. This device provides 64 possible uniform

tap points over the entire resistive range. The standard resistive ranges are 10 kΩ, 50 kΩ, and 100 kΩ.

The Dallastat can be controlled by either a switch contact closure input or a digital source input such as a

CPU. The DS1869 operates from 3V or 5V supplies. Wiper position is maintained in the absence of

power through the use of a EEPROM memory cell array. The EEPROM cell array will withstand more

than 50,000 writes.

The DS1869 is offered in two standard IC packages which include an 8-pin 300-mil DIP and an 8-pin

208-mil SOIC. The DS1869 can be configured to operate using a single pushbutton, dual pushbutton or

digital source input by varying power-on conditions. This is illustrated in Figures 1 and 2. The DS1869

pinouts allow access to both ends of the potentiometer R

, R

, and the wiper, R

. Control inputs include

the digital source input, D, the up contact input, UC, and the down contact input, DC. Other pins include

the positive, +V, and negative, -V, supply inputs. The DS1869 is specified to operate from -40°C to

+85°C.

DS1869

3V Dallastat

Electronic

Digital Rheostat

www.dalsemi.com

8-Pin DIP (300-mil)

See Mech. Drawings Section

(

)

(

)

V-

8-Pin SOIC (208-mil)

See Mech. Drawin

s Section

(

)

(

)

V-

1 2 3 4 5 6 7 8

Podsumowanie treści

Strona 1 - Digital Rheostat

1 of 8 112099FEATURES Replaces mechanical variable resistors Operates from 3V or 5V supplies Electronic interface provided for digital aswell as ma

Strona 2 - OPERATION

DS18692 of 8OPERATIONThe DS1869 can be configured to operate from a single contact closure, dual contact closure, or a digitalsource input. Figures 1

Strona 3 - (TYPICAL EXAMPLE) Figure 2A

DS18693 of 8In dual pushbutton mode, each direction is controlled by the up contact (UC) and down contact (DC)inputs, respectively. No wait states are

Strona 4 - NONVOLATILE WIPER SETTINGS

DS18694 of 8DS1869 DUAL PORT CONFIGURATION (TYPICAL EXAMPLE) Figure 2BThe DS1869 is provided with two supply inputs -V and +V. The maximum voltage dif

Strona 5

DS18695 of 8FLOWCHART: ONE-BUTTON OPERATIONAND ELECTRICAL CONTROL Figure 3CONTACT OPEN AND CONTACT CLOSURE TIMING IS 1 SECOND ± 15%

Strona 6

DS18696 of 8FLOWCHART: TWO-BUTTON OPERATION Figure 4CONTACT OPEN AND CONTACT CLOSURE TIMING IS 1 SECOND ± 15%

Strona 7

DS18697 of 8ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to -V -V -0.5V +8.0VOperating Temperature -40°C to +85°CStorage Temperature -55°C

Strona 8 - TIMING DIAGRAMS Figure 5

DS18698 of 8TIMING DIAGRAMS Figure 5NOTES:1. All inputs; UC, DC, and D are internally pulled up with a typical resistance of 100 kΩ.2. Input logic lev

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Rainbow-electronics DS1869 Instrukcja Użytkownika Strona 1

Przeglądaj online lub pobierz Instrukcja Użytkownika dla Sprzęt komputerowy Rainbow-electronics DS1869. Rainbow Electronics DS1869 User Manual Instrukcja obsługi

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Rainbow-electronics DS1869 Instrukcja Użytkownika Strona 1

Przeglądaj online lub pobierz Instrukcja Użytkownika dla Sprzęt komputerowy Rainbow-electronics DS1869. Rainbow Electronics DS1869 User Manual Instrukcja obsługi

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