Datasheet

LTC2930
5
2930fa
C
RT
(F)
RESET TIMEOUT PERIOD t
RST
(s)
2930 G10
10
1
100m
10m
1m
100μ
10μ
10p 100p 1n 100n 1μ10n
T
A
= 25°C
V1 OR V2 (V)
0
I
SINK
(mA)
9
12
15
4
2930 G11
6
3
0
1
2
3
5
T
A
= 25°C
V
OL
= 0.4V
V
OL
= 0.2V
I
SINK
(mA)
0
V
OL
(mV)
300
400
500
8
2930 G12
200
100
0
2
4
6
10
V1 = 5V
V2 = 3V
125°C
85°C
25°C
–40°C
V2 (V)
2.0
0
PULL-UP CURRENT (μA)
3
6
9
12
18
2.5
3.0 3.5 4.0
2930 G13
4.5 5.0
15
T
A
= 25°C
V
RT25
V
RT30
V
RT33
TYPICAL PERFORMANCE CHARACTERISTICS
Reset Timeout Period vs C
RT
Voltage Output Low
vs Output Sink Current (RST)
RST Pull-Up Current vs V2
I
SINK
vs Supply Voltage (RST)
PIN FUNCTIONS
V5 (Pin 1): Adjustable Voltage Input 5. High impedance
comparator input with 0.5V typical threshold. See
Applications Information for details. Tie to V1 if unused.
V3 (Pin 2): Voltage Input 3. Select from 2.5V, 1.8V, 1.5V,
or ADJ. See Applications Information for details. Tie to
V1 if unused.
V1 (Pin 3): Voltage Input 1. Select from 5V or 3.3V. See
Applications Information for details. The greater of V1 or
V2 is also V
CC
for the device. Bypass this pin to ground
with a 0.1μF (or greater) capacitor.
CRT (Pin 4): Reset Timeout Capacitor. Attach an external
capacitor (C
RT
) to GND to set a reset timeout of 2ms/nF.
Leaving the pin open generates a minimum delay of
approximately 25μs. A 47nF capacitor generates a 94ms
reset delay time.
RST (Pin 5): Reset Output. Logic output with weak 6μA
pull-up to V2. Pulls low when any voltage input is below
the reset threshold and held low for the confi gured delay
time after all voltage inputs are above threshold. Use an
external pull-up to pull greater than V2. Leave open if
unused.