Datasheet

© 2008 Microchip Technology Inc. DS22103A-page 35
MCP23018/MCP23S18
2.2 AC CHARACTERISTICS
FIGURE 2-1: LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS
FIGURE 2-2: RESET
AND DEVICE RESET TIMER TIMING
TABLE 2-1: RESET
AND DEVICE RESET TIMER REQUIREMENTS
AC Characteristics Standard Operating Conditions (unless otherwise specified)
1.8V ≤ V
DD ≤ 5.5V at -40°C ≤ TA ≤ +125°C.
Parameter
No. Sym Characteristic Min Typ
(2)
Max Units Conditions
30 T
RSTL RESET Pulse Width (low) 1 — — µs VDD = 5.0V
32 T
HLD Device active after reset high — 0 — µs VDD = 5.0V
31 T
POR POR at device power up — 20 — µs VDD = 5.0V
34 Tio
Z Output Hi-impedance from
RESET Low
— — 1 µs
Note 1: This parameter is characterized, not 100% tested.
2: Data in the Typical (“Typ”) column is at 5V, +25°C, unless otherwise stated.
135 pF
1kΩ
VDD
SCL and
SDA pin
MCP23018
50 pF
Pin
VDD
RESET
Internal
RESET
34
Output pin
32
30
31