DS2490Y Maxim Integrated Products, DS2490Y Datasheet - Page 2

• Manufacturer Part Number: DS2490Y
• Description: IC BRIDGE CLIP USB TO 1-W 24SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS2490Y

• Applications: USB
• Interface: 1-Wire
• Voltage - Supply: 3 V ~ 5.5 V
• Package / Case: 24-SOIC (7.5mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SIGNAL SUMMARY Table 1
RELATED DOCUMENTS
This specification uses terms from and references or complies with the Universal Serial Bus Specification
v1.1, which may be obtained from the USB Implementers Forum website: www.usb.org. The USB
specification is considered to be part of the DS2490 specification.
DOCUMENT ORGANIZATION
The remainder of this document is organized into the following major sections:
SIGNAL NAME
VD
VD2
VB
D+
D-
1-Wire
PMOD
XI
XO
GND
NC
SECTION
OVERVIEW
1-WIRE I/F CONTROLLER
USB COMMUNICATION
MODE COMMANDS
CONTROL COMMANDS
COMMUNICATION COMMANDS
DEVICE FEEDBACK
USB TRANSCEIVER
OSCILLATOR
SUSPEND OUTPUT
SUSO
TYPE
PWR
PWR
PWR
PWR
I/O
I/O
I/O
O
O
I
I
Power supply input for digital and 1-Wire functions. Range: 5.0  10%
are not tied together inside the package).
Power supply input for USB functions. Range: 3.3V  10% supply
regulated from USB supplied VBUS.
USB data—non-inverted of differential data pair.
USB data—inverted signal of differential data pair.
1-Wire input/output.
controller. When HIGH the USB is in an active non-suspended state,
when LOW the USB has entered a suspended state. This is an open drain
output and requires an external pullup.
Crystal input. Use a 12.0 MHz, fundamental-mode, parallel-resonant
crystal. A 12.0MHz CMOS clock source may also be used.
FUNCTION
Second VD supply, must be tied to VD externally to the IC (the two pins
Reserved for future use. Must be tied to GND.
Suspend Output—buffered USB suspend-state output from USB device
Crystal output. Connect to other side of crystal 1 if used.
Ground reference and ground return for 1-Wire bus.
No connect. For factory use or reserved, do not connect to these pins.
SUMMARY
Device functional summary and application examples
Edge control and timing diagrams of 1-Wire signals
Configuration model, core and vendor-specific command
Commands used to configure 1-Wire interface operational
Commands used to control 1-Wire communication
Commands used to communicate with an attached 1-Wire
Technique to obtain device status information
Transceiver connection requirements
Oscillator connection requirements
SUSO signal operation and purpose
summaries
characteristics
command processing
device
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