Rainbow Electronics DS2705 - Manual (Page 3)

DS2705: SHA-1 Authentication Master
3 of 18
AC ELECTRICAL CHARACTERISTICS: MASTER 1-Wire INTERFACE
(2.5V £ V
DD
£ 5.5V, T
A
= -20 °C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STANDARD BUS TIMING
Time Slot t
MSLOT
(Note 10) 90 ms
Recovery Time t
MREC
(Note 10) 7.5 10 12.5 ms
Write-0 Low Time t
MLOW0
(Note 10) 88.5 ms
Write-1 Low Time t
MLOW1
(Note 10) 1.05 1.5 2.25 ms
Read-Data Sample Window t
MRDV
(Note 10) 4.0 5.5 7.0 ms
Reset-Time Low t
MRSTL
(Note 10) 510 680 850 ms
Presence-Detect High t
MPDH
(Note 10) 2 75 ms
Presence-Detect Low t
MPDL
(Note 10) 2 400 ms
OVERDRIVE BUS TIMING
Time Slot t
MSLOT
(Note 10) 12 ms
Recovery Time t
MREC
(Note 10) 1 2 2.5 ms
Write-0 Low Time t
MLOW0
(Note 10) 10.5 ms
Write-1 Low Time t
MLOW1
(Note 10) 0.35 0.5 0.65 ms
Read-Data Sample Window t
MRDV
(Note 10) 1.1 1.5 1.9 ms
Reset-Time Low t
MRSTL
(Note 10) 53 70 88 ms
Presence-Detect High t
MPDH
(Note 10) 2 7 ms
Presence-Detect Low t
MPDL
(Note 10) 2 41 ms