DS2405_07 Datasheet, PDF (1/15 Pages) Dallas Semiconductor – Addressable Switch

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FEATURES
ƒ Open-drain PIO pin is controlled by
matching 64-bit, laser-engraved registration
number associated with each device
ƒ Logic level of open drain output can be
determined over 1-Wire^® bus for closed-loop
control
ƒ PIO pin sink capability is greater than 4mA
at 0.4V
ƒ Multiple DS2405s can be identified on a
common 1-Wire bus and be turned on or off
independent of other devices on the bus
ƒ Unique, factory-lasered and tested 64-bit
registration number (8-bit family code +48-
bit serial number +8-bit CRC tester) assures
absolute identity because no two parts are
alike
ƒ Built-in multidrop controller ensures
compatibility with other MicroLAN products
ƒ Reduces control, address, data, and power to
a single data pin
ƒ Directly connects to a single port pin of a
microprocessor and communicates at up to
16.3kbits/s
ƒ 8-bit family code specifies DS2405
communications requirements to reader
ƒ 8-bit cyclic redundancy check ensures error-
free selection
ƒ Zero standby power required
ƒ Low cost TO-92, SOT-223, or 6-pin TSOC
surface mount package
ƒ 1-Wire communication operates over a wide
voltage range of 2.8V to 6.0V from -40°C to
+85°C
DS2405
Addressable Switch
PIN ASSIGNMENT
TO-92
DS2405
TSOC PACKAGE
GND
NC
DATA
NC
PIO
NC
TOP VIEW
3.7 X 4.0 X 1.5
123
123
BOTTOM VIEW
See Mech.
Drawings Section
TOP VIEW
NOTE: The leads of TO-92 packages on tape-and-reel are
formed to approximately 100 mils (2.54 mm) spacing. For
details refer to drawing 56-G0006-003.
PIN DESCRIPTION TSOC
Pin 1 - Ground
Pin 1 - Ground
Pin 2 - Data
Pin 2 - Data
Pin 3 - PIO
Pin 3 - PIO
Pin 4 - Ground
Pin 4-6 -No Connect
1-Wire is a registered trademark of Dallas Semiconductor.
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