DS2405
Addressable Switch
www.dalsemi.com
FEATURES
摟
Open drain PIO pin is controlled by
matching 64-bit, laser-engraved registration
number associated with each device
摟
Logic level of open drain output can be
determined over 1-Wire bus for closed-loop
control
摟
PIO pin sink capability is greater than 4 mA
at 0.4V
摟
Multiple DS2405鈥?can be identified on a
s
common 1-Wire bus and be turned on or off
independent of other devices on the bus
摟
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
摟
Built-in multidrop controller ensures
compatibility with other MicroLAN products
摟
Reduces control, address, data, and power to
a single data pin
摟
Directly connects to a single port pin of a
microprocessor and communicates at up to
16.3 kbits/s
摟
8-bit family code specifies DS2405
communications requirements to reader
摟
8-bit cyclic redundancy check ensures error-
free selection
摟
Zero standby power required
摟
Low cost TO-92, SOT-223, or 6-pin TSOC
surface mount package
摟
1-Wire communication operates over a wide
voltage range of 2.8V to 6.0V from -40擄C to
+85擄C
PIN ASSIGNMENT
TSOC PACKAGE
TO-92
DS2405
GND
DATA
PIO
NC
NC
NC
TOP VIEW
3.7 X 4.0 X 1.5
1 2 3
1 2 3
TOP VIEW
BOTTOM VIEW
See Mech.
Drawings Section
PIN DESCRIPTION TSOC
Pin 1
Pin 2
Pin 3
Pin 4
- Ground
- Data
- PIO
- Ground
Pin 1
Pin 2
Pin 3
Pin 4-6
- Ground
- Data
- PIO
-No Connect
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