Owner's manual

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