Datasheet
LTC2904/LTC2905
6
29045fd
RST PULL-DOWN CURRENT, I
RST
(mA)
0
RST OUTPUT VOLTAGE LOW, V
OL
(V)
20
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
29045 G19
10 50 604030
25oC
85oC
–40oC
V1 = 5V
V2 = 3V
S1 = S2 = TOL = V1
NO PULL-UP R
RST PULL-DOWN CURRENT, I
RST
(mA)
0
RST OUTPUT VOLTAGE LOW, V
OL
(V)
20
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
29045 G20
10 50 604030
25oC
85oC
–40oC
V1 = 5V
V2 = 3.3V
S1 = S2 = TOL = V1
NO PULL-UP R
SUPPLY VOLTAGE, V
CC
(V)
2.0
RST PULL-UP CURRENT, I
RST
(MA)
4.0
–18
–16
–14
–12
–10
–8
–6
–4
–2
0
29045 G21
3.0 5.0
2.5
4.5
3.5
V
RT25
V
RT33
V
RT50
TOL = GND
SUPPLY VOLTAGE, V
CC
(V)
2.0
4.0
29045 G22
3.0 5.0
2.5
4.5
3.5
RST PULL-UP CURRENT, I
RST
(MA)
–16
–14
–12
–10
–8
–6
–4
–2
0
TOL = V1
V
RT25
V
RT33
V
RT50
OUTPUT SOURCE CURRENT, I
RST
(MA)
–12
RST OUTPUT VOLTAGE HIGH, V
OH
(V)
3.0
2.5
2.0
1.5
1.0
0.5
–10
–8 –6 –4
29045 G23
–2 0
V1 = 3.3V
V2 = 1.8V
S1 = TOL =V1
S2 = OPEN
NO PULL-UP R
25oC
85oC
–40oC
OUTPUT SOURCE CURRENT, I
RST
(MA)
–7
RST OUTPUT VOLTAGE HIGH, V
OH
(V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
–1
–8 –6 –3–4–5
29045 G24
–2 0
V1 = 3.3V
V2 = 1.5V
S1 = TOL = V1
S2 = OPEN
NO PULL-UP R
25oC
85oC
–40oC
RST Pull-Up Current (I
RST
)
vs Supply Voltage (V
CC
)
RST Output Voltage High (V
OH
)
vs RST Output Source Current (I
RST
)
RST Output Voltage High (V
OH
)
vs RST Output Source Current (I
RST
)
RST Output Voltage Low (V
OL
)
vs RST Pull-Down Current (I
RST
)
RST Output Voltage Low (V
OL
)
vs RST Pull-Down Current (I
RST
)
RST Pull-Up Current (I
RST
)
vs Supply Voltage (V
CC
)
TYPICAL PERFORMANCE CHARACTERISTICS
Specifi cations are at T
A
= 25°C unless otherwise noted.
V1 (V)
0
RST OUTPUT VOLTAGE (V)
5
4
3
2
1
0
–1
1234
29045 G16
5
V2 = S1 = S2 = TOL = V1
10pF CAPACITOR AT RST
SUPPLY VOLTAGE, V
CC
(V)
0
RST PULL-DOWN CURRENT, I
RST
(mA)
5
4
3
2
1
0
4
29045 G17
123 5
RST AT 150mV
RST AT 50mV
V2 = S1 = S2 = TOL = V1
NO PULL-UP R
SUPPLY VOLTAGE, V
CC
(V)
0
RST PULL-DOWN CURRENT, I
RST
(mA)
5
4
3
2
1
0
4
29045 G18
123 5
RST AT 150mV
RST AT 50mV
S1
= V2 = V1
TOL = S2 = GND
NO PULL-UP R
RST Output Voltage vs V1
RST Pull-Down Current (I
RST
)
vs Supply Voltage (V
CC
)
RST Pull-Down Current (I
RST
)
vs Supply Voltage (V
CC
)