SH3100 Datasheet, PDF (52/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

SH3100
POWER MANAGEMENT
Pad Specifications (continued)
Dual Supply Digital Output: CLK0 & CLK1
Digital output pad able to drive clock outputs at up to 33.5MHz powered from either the VDD or VBAK supplies.
Includes diode protection to GND.
Parameter
V_OUT High (Vdd > 3.3V, Ioh = 4mA)
V_OUT Low (Vdd > 3.3V, Iol = 4mA)
V_OUT High (Vdd > 1.7V, Ioh = 1mA)
V_OUT Low (Vdd > 1.7V, Iol = 1mA)
Pad Rise time (10 pF load, 10 – 90%)
Pad Rall time (10 pF load, 10 – 90%)
Symbol
V_OH1
V_OL1
V_OH2
V_OL2
T_r
T_f
Min
Vdd – 0.4
0
Vdd – 0.25
0
Max
Vdd
0.4
Vdd
0.25
15
15
Note: VDD may be either VDD or VBAK depending on supply
selected. VDD is always VBAK when driving out 32.768 kHz in
battery backup mode.
Units
V
V
V
V
ns
ns
Asymmetric Drive Digital Output: NRST
Asymmetric digital output pad with hard pull-down and weak pull-up. This is used to provide the active low reset output
to the microcontroller. The weak pull-up is implemented as a resistance to VDD and allows the NRST pin to be pulled
low if required by an external device. Includes diode protection to VDD and GND.
Parameter
Rout High (Weak pull-up to VDD)
Vout Low (VDD > 3.3 V, Iol = 4 mA)
Vout Low (VDD < 1.7 V, Iol = 1 mA)
Pad rise time (20 pF load)
Pad fall time (20 pF load)
Symbol
Min
Typ
Max
Units
R_OH
17
20
23
kΩ
V_OL1
0
0.4
V
V_OL2
0
0.2
V
T_r
300
ns
T_f
15
ns
© 2006 Semtech Corp.
52
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