Rainbow Electronics DS2705 User 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