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DS2490X Datasheet

  • DS2490X

  • USB to 1-Wire Bridge Chip(468.41 k)

  • 50頁

  • ETC

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DS2490
USB to 1-Wire Bridge Chip
www.maxim-ic.com
FEATURES
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
Communicates at regular and overdrive 1-
Wire
廬
speeds
Supports 12V EPROM programming and stiff
5V pullup for EEPROM, sensors, and crypto
iButton
廬
Slew rate controlled 1-Wire timing and active
pullup to accommodate long 1-Wire network
lines and reduce radiation
Programmable 1-Wire timing and driver
characteristics accommodate a wide range of
1-Wire network configurations
Low- to high-level command types, including
macros, for generating 1-Wire communication
Crystal oscillator timebase provides precision
timed 1-Wire waveforms
High-speed 12Mbps Universal Serial Bus
(USB) interface
Integrated USB-compliant transceiver
Supports USB remote wake-up from a 1-Wire
device event to resume a suspended host
system
0
o
C to +70
o
C operating temperature range
PIN ASSIGNMENT
24-Pin SO
Top View
(300-mil)
PMOD
NC
NC
NC
VB
SUSO
D-
D+
NC
1-WIRE
NC
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VD
NC
NC
NC
XO
XI
NC
VPP
NC
NC
NC
NC
Flip-Chip Package, Top View
A4
B4
C4
D4
E4
F4
G4
NC
A3
NC
B3
SUSO\
C3
D-
GND
E3
NC
F3
NC
G3
4.4 mm
NC
A2
PMOD
B2
VB
C2
D+
E2
1W
F2
NC
G2
NC
A1
VDD
B1
NC
C1
D1
NC
E1
NC
F1
NC
G1
NC
NC
XO
XI
7.1 mm
VPP
NC
NC
ORDERING INFORMATION
PART NUMBER
DS2490S
DS2490S/T&R
DS2490X
PACKAGE DESCRIPTION
24-pin SO
Tape & Reel of DS2490S
Flip-Chip Package, Tape & Reel
DESCRIPTION
The DS2490 is a bridge chip that enables communication between a USB host system and a 1-Wire bus.
It provides regular, overdrive, and flexible 1-Wire communication speeds and a full-speed 12Mbps
connection to USB. USB vendor-specific commands defined in this specification are used to control the
DS2490 and communicate with attached 1-Wire devices. A functional block diagram of the DS2490 is
shown in Figure 1.
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