Datasheet

© 2009 Microchip Technology Inc. DS22152B-page 9
MCP40D17/18/19
1.1 I
2
C Mode Timing Waveforms and Requirements
FIGURE 1-1: I
2
C Bus Start/Stop Bits Timing Waveforms.
TABLE 1-1: I
2
C BUS START/STOP BITS REQUIREMENTS
FIGURE 1-2: I
2
C Bus Data Timing.
I
2
C AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature –40°C ≤ T
A ≤ +125°C (Extended)
Operating Voltage V
DD
range is described in Section 2.0 “Typical
Performance Curves”
Param.
No.
Symbol Characteristic Min Max Units Conditions
F
SCL
Standard Mode 0 100 kHz C
b
= 400 pF, 1.8V - 5.5V
Fast Mode 0 400 kHz C
b
= 400 pF, 2.7V - 5.5V
D102 Cb Bus capacitive
loading
100 kHz mode — 400 pF
400 kHz mode — 400 pF
90 T
SU:STA START condition 100 kHz mode 4700 — ns Only relevant for repeated
START condition
Setup time 400 kHz mode 600 — ns
91 T
HD:STA START condition 100 kHz mode 4000 — ns After this period the first
clock pulse is generated
Hold time 400 kHz mode 600 — ns
92 T
SU:STO STOP condition 100 kHz mode 4000 — ns
Setup time 400 kHz mode 600 — ns
93 T
HD:STO STOP condition 100 kHz mode 4000 — ns
Hold time 400 kHz mode 600 — ns
91
93
SCL
SDA
START
Condition
STOP
Condition
90
92
Note 1: Refer to specification D102 (Cb) for load conditions.
90
91 92
100
101
103
106
107
109
109
110
102
SCL
SDA
In
SDA
Out