DS9097U_11 Datasheet, PDF (1/3 Pages) Maxim Integrated Products – Universal 1-Wire COM Port Adapter Provides Strong Pullup to 5V for Temperature

19-4874; Rev 6/11
DS9097U
Universal 1-Wire COM Port Adapter
FEATURES
 True-Ground Interface to an RS-232 COM Port
for Reading and Writing 1-Wire^® Devices
 Works with Bipolar as well as Unipolar Logic
Signals
 Compatible to COM port of (±)5V to (±)12V
(DB9 Version Only) or (±)6V to (±)12V (DB25
Version)
 Supports Reading and Writing at Standard and
Overdrive Speeds
 Provides Strong Pullup to 5V for Temperature
and EEPROM 1-Wire Devices
 Programs 1-Wire EPROM Devices (DB-25
Version with External 12V Power Supply Only)
 Communicates at Data Rates of 9.6kbps
(default), 19.2kbps, 57.6kbps, and 115.2kbps
 Standard DB9 or DB25 Female Connector and
6-Lead RJ11 Connector for Easy Attachment
of Standard 1-Wire Cables and Probes
 Includes DS2502 Identification Chip
(DS9097U-009 Only)
PIN ASSIGNMENT
DB9: TXD (3), RXD (2), DTR (4), RTS (7), PC-Ground
(5); all other pins not connected
DB25: TXD (2), RXD (3), DTR (20), RTS (4), PC-
Ground (7); all other pins not connected
Note 1: The external supply for the DS9097U-E25
must provide well-regulated 12V at 10mA minimum,
center = GND, outer ring = V+ (Newark Electronics
Stock No. 84F2081, Allied Electronics Stock No. 928-
9895, Stancor Model STA-300R, or equivalent).
Note 2: The color of the DS9097U plastic case can
vary.
ORDERING INFORMATION
PACKAGE OUTLINE
DB9 VERSION
RJ11 PIN 1
SIDE VIEW
DB25 VERSION
REAR VIEW
RJ11 PIN 1
SIDE VIEW
2.1mm
POWER JACK
- CONTACT
+ CONTACT
REAR VIEW
SCHEMATIC (FOR ILLUSTRATION)
DB9 VERSION
RS-232
COM PORT
RTS
DTR
RXD
TXD
GND
DS9097U-009
ONLY
5V
REG
46
8
DS2480B ₅
7
2
1
ID
CHIP
RJ11
6
5
4 1-W
3 GND
2
1
PART
TYPE
DS9097U-009#
DB9, with DS2502 ID chip
DS9097U-S09#
DB9, no ID chip
DS9097U-E25#
DB25, with EPROM write
#Denotes a RoHS-compliant device that may include lead(Pb) that
is exempt under the RoHS requirements.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
DB25 VERSION
RS-232
POWER JACK
COM PORT
RJ-11
5V
6
RTS
DTR
RXD
TXD
GND
REG
9V
46
8
DS2480B ₅
7
2
5
4 1-W
3 GND
2
1
1
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