SH3100 Datasheet, PDF (53/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

SH3100
POWER MANAGEMENT
Pad Specifications (continued)
Dual Drive Digital Bidirectional: INT
This is a bi-directional digital pad with optional High or Low output drive strengths. It includes a Schmitt input stage.
The pin may be used either as the Interrupt output or as a general-purpose I/O (GPIO).
Low drive strength is implemented as a pull-up or pull-down impedance to allow the pin to be overdriven by an external
source if required. Supply is VDD and the pad includes diode protection to VDD and GND.
High Drive
Low Drive
Input mode
Timing
Parameter
Vout High (VDD > 3.3 V, Ioh = 4 mA)
Vout Low (VDD > 3.3 V, Iol = 4 mA)
Vout High (VDD > 1.7 V, Ioh = 1 mA)
Vout Low (VDD > 1.7 V, Iol = 1 mA)
Rout High (Weak pull-up to VDD)
Rout Low (Weak pull-down to GND)
Vin High
Vin Low
Input pin capacitance
Input hysteresis
Pad rise time (10 pF load)
Pad fall time (10 pF load)
Symbol
V_OH1
V_OL1
V_OH2
V_OL2
R_OH
R_OL
V_IH
V_IL
C_IN
V_HY
Tr
Tf
Min
VDD – 0.4
0
VDD – 0.25
0
17
17
VDD - 0.4
50
Max
VDD
0.4
VDD
0.25
23
23
0.4
20
500
10
10
Units
V
V
kΩ
kΩ
V
V
pF
mV
ns
ns
Note: If the INT pin is programmed as a GPIO input (default
state), it must be tied high (VDD) or low (GND) to ensure that a
floating input does not cause excessive current consumption
in the digital input stage.
© 2006 Semtech Corp.
53
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