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DS1996L-F5+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
DS1996
16 of 19
READ/WRITE TIMING DIAGRAM Figure 11 (cont’d)
Write-Zero Time Slot
Regular Speed Overdrive Speed
60 µs ≤ t
LOW0
< t
SLOT
< 120 µs 6 µs ≤ t
LOW0
< t
SLOT
< 16 µs
1 µs ≤ t
REC
< ∞ 1 µs ≤ t
REC
< ∞
Read-Data Time Slot
Regular Speed Overdrive Speed
60 µs ≤ t
SLOT
< 120 µs 6 µs ≤ t
SLOT
< 16 µs
1 µs ≤ t
LOWR
< 15 µs 1 µs ≤ t
LOWR
< 2 µs
0 ≤ t
RELEASE
< 45 µs 0 ≤ t
RELEASE
< 4 µs
1 µs ≤ t
REC
< ∞ 1 µs ≤ t
REC
< ∞
t
RDV
= 15 µs t
RDV
= 2 µs
t
SU
< 1 µs t
SU
< 1 µs
RESISTOR
MASTER
DS1996
DS1996
17 of 19
PHYSICAL SPECIFICATIONS
Size See mechanical drawing
Weight 3.3 grams (F5 package)
Humidity 90% RH at 50°C
Altitude 10,000 feet
Expected Service Life 10 years at 25°C
ABSOLUTE MAXIMUM RATINGS*
Voltage on any Pin Relative to Ground -0.5V to +7.0V
Operating Temperature -40°C to +70°C
Storage Temperature -40°C to +70°C
∗ This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
DC ELECTRICAL CHARACTERISTICS (V
PUP
=2.8V to 6.0V, -40°C to +70°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Logic 1
V
IH
2.2
V
CC
+0.3
V
1, 7
Logic 0
V
IL
-0.3
+0.3
V
1
Output Logic Low @ 4 mA
V
OL
0.4
V
1
Input Load Current
I
L
5
µA
2
CAPACITANCE (T
A
= 25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
I/O (1-Wire)
C
IN/OUT
100
800
pF
5
AC ELECTRICAL CHARACTERISTICS: REGULAR SPEED (-40°C to 70°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Time Slot
t
SLOT
60
120
µs
Write 1 Low Time
t
LOW1
1
15
µs
Write 0 Low Time
t
LOW0
60
120
µs
Read Data Valid
t
RDV
exactly 15
µs
Release Time
t
RELEASE
0
15
45
µs
Read Data Setup
t
SU
1
µs
4
Recovery Time
t
REC
1
µs
Reset Time High
t
RSTH
480
µs
3
Reset Time Low
t
RSTL
480
µs
6
Presence Detect High
t
PDH
15
60
µs
Presence Detect Low
t
PDL
60
240
µs
DS1996
18 of 19
AC ELECTRICAL CHARACTERISTICS: OVERDRIVE SPEED (-40°C to 70°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Time Slot
t
SLOT
6
16
µs
Write 1 Low Time
t
LOW1
1
2
µs
Write 0 Low Time
t
LOW0
6
16
µs
Read Data Valid
t
RDV
exactly 2
µs
Release Time
t
RELEASE
0
1.5
4
µs
Read Data Setup
t
SU
1
µs
4
Recovery Time
t
REC
1
µs
Reset Time High
t
RSTH
48
µs
3
Reset Time Low
t
RSTL
48
80
µs
Presence Detect High
t
PDH
2
6
µs
Presence Detect Low
t
PDL
7
24
µs
NOTES:
1. All voltages are referenced to ground.
2. Input load is to ground.
3. An additional reset or communication sequence cannot begin until the reset high time has expired.
4. Read data setup time refers to the time the host must pull the 1-Wire bus low to read a bit. Data is
guaranteed to be valid within 1 µs of this falling edge.
5. Capacitance on the data contact could be 800 pF when power is first applied. If a 5 kΩ resistor is used
to pullup the data line to V
CC
, 5 ms after power has been applied, the parasite capacitance will not
affect normal communications.
6. The reset low time (t
RSTL
) should be restricted to a maximum of 960 µs, to allow interrupt signaling,
otherwise, it could mask or conceal interrupt pulses.
7. V
IH
is a function of the external pullup resistor and the V
CC
power supply.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

DS1996L-F5+

Mfr. #:
Buy DS1996L-F5+
Manufacturer:
Maxim Integrated
Description:
iButtons & Accessories 64Kb Memory iButton
Lifecycle:
New from this manufacturer.
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