DS9097U
Universal 1-Wire® COM Port Adapter
www.dalsemi.com
FEATURES
PACKAGE OUTLINE
DB-09 version
ꢀ True-ground interface to an RS232 COM Port
for reading and writing 1-Wire devices
ꢀ Works with bipolar as well as unipolar logic
signals
RJ-11 pin 1
ꢀ Compatible to COM ports of (±)5V to (±)12V
(DB-9 version only) or (±)6V to (±)12V
(DB-25 version)
ꢀ Supports reading and writing at regular and
Overdrive speeds
SIDE VIEW
REAR VIEW
DB-25 version
ꢀ Provides strong pull-up to 5V for Tempera-
ture-, Crypto- and EEPROM 1-Wire devices
ꢀ Programs 1-Wire EPROM devices (DB-25
version with external 12V power supply only)
ꢀ Communicates at data rates of 9.6 (default),
19.2, 57.6 and 115.2 kbits/s
ꢀ Standard DB-9 or DB-25 female connector
and 6-lead RJ-11 connector for easy attach-
ment of standard 1-Wire cables and probes
ꢀ Includes DS2502 identification chip
(DS9097U-009 only)
RJ-11 pin 1
2.1mm
power jack
- contact
+ contact
SIDE VIEW
REAR VIEW
SCHEMATIC (for illustration)
DB-9 version
PIN ASSIGNMENT
RS232
COM Port
DS9097U-009
only
RJ-11
DB-25: TXD (2), RXD (3), DTR (20), RTS (4),
PC-Ground (7); all other pins not connected
DB-9: TXD (3), RXD (2), DTR (4), RTS (7),
PC-Ground (5); all other pins not connected
5V
Reg.
6
5
RTS
DTR
RXD
TXD
GND
4 1-W
3 GND
2
4
6
8
7
ID
Chip
DS
2480B
5
2
NOTE:
1
The external supply for the DS9097U-E25 must
provide well regulated 12V @ 10 mA minimum,
center = GND, outer ring = V+ (Newark
Electronics Stock No. 84F2081, Allied
Electronics Stock No. 928-9895, Stancor Model
STA-300R, or equivalent)
1
DB-25 version
Power Jack
RS232
COM Port
RJ-11
5V
Reg.
6
RTS
DTR
RXD
TXD
GND
5
9V
ORDERING INFORMATION
4 1-W
3 GND
2
1
4
6
DS9097U-009
DS9097U-S09
DS9097U-E25
DB-9, with DS2502 ID chip
DB-9, no ID chip
DB-25, with EPROM write
8
7
DS
5
2
2480B
1
1 of 2
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