DS2490Y Maxim Integrated Products, DS2490Y Datasheet - Page 16

• 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

Flexible Speed Write-1 Low Time Codes Table 9
DSOW0 RECOVERY TIME—This command is used to select the Data Sample Offset (t
recovery (t
possible. The parameter codes to select the desired or required recovery time are as listed in Table 10.
The numbers in the table represent nominal values. The nominal DSO/W0R time for Regular speed is
16s, for Overdrive speed the Data Sample Offset is 1s and the Write-0 Recovery Time is 3s. The
DS2490 decodes the three LSBs of the DSO/W0R code. Sending a code other than the defined values in
Table 10 will result in undefined behavior. The DS2490 DSO/W0R power-up default value for Flexible
speed is 18
Flexible Speed DSO/ W0R Time Codes Table 10
Power-on Default Mode Values
Table 11 summarizes the power-up default values for the various DS2490 mode registers. Note that the
power-up default communication speed is regular and several of the values listed in Table 11 are specific
to Flexible speed operation. To change a value the appropriate Mode or Communication command must
be sent to the device.
0x8..0xF
0x8..0xF
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Code
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
W0R

s.
) time (DSO/W0R) for 1-Wire bus Flexible Speed operation; eight DSO/W0R times are
Nominal DSO/W0R Time
Nominal Write-1 Low Time
reserved
reserved
10s
12s
14s
16s
18s
20s
22s
24s
10s
11s
4s
5s
6s
7s
8s
9s
16 of 50
DSO
) / Write-0