DS9097U
Universal 1-Wire
廬
COM Port Adapter
www.dalsemi.com
FEATURES
True-ground interface to an RS232 COM Port
for reading and writing 1-Wire devices
Works with bipolar as well as unipolar logic
signals
Compatible to COM ports of (鹵)5V to (鹵)12V
(DB-9 version only) or (鹵)6V to (鹵)12V
(DB-25 version)
Supports reading and writing at regular and
Overdrive speeds
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)
PACKAGE OUTLINE
DB-09 version
RJ-11 pin 1
SIDE VIEW
REAR VIEW
DB-25 version
RJ-11 pin 1
2.1mm
power jack
- contact
+ contact
SIDE VIEW
REAR VIEW
SCHEMATIC
(for illustration)
DB-9 version
RS232
COM Port
RTS
DTR
RXD
TXD
GND
5V
Reg.
4
8
7
6
PIN ASSIGNMENT
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
DS9097U-009
only
RJ-11
6
5
4 1-W
3 GND
2
1
NOTE:
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)
DS
5
2480B
1
ID
Chip
2
DB-25 version
RS232
COM Port
RTS
DTR
RXD
TXD
GND
5V
Reg.
4
8
7
6
Power Jack
RJ-11
9V
ORDERING INFORMATION
DS9097U-009
DS9097U-S09
DS9097U-E25
DB-9, with DS2502 ID chip
DB-9, no ID chip
DB-25, with EPROM write
1 of 2
DS
5
2480B
1
2
6
5
4 1-W
3 GND
2
1
091100
1
2
