LTC2935
3
2935fa
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
V
CC
Input Supply Voltage
l
5.5 V
I
CC
V
CC
Input Supply Current
l
225 500 1000 nA
Reset Thresholds (LTC2935-1/LTC2935-2)
V
RTF1
Reset Threshold 1 (V
CC
Falling) S2 = Low : S1 = Low : S0 = Low
l
3.251 3.300 3.349 V
V
RTF2
Reset Threshold 2 (V
CC
Falling) S2 = Low : S1 = Low : S0 = High
l
3.103 3.150 3.197 V
V
RTF3
Reset Threshold 3 (V
CC
Falling) S2 = Low : S1 = High : S0 = High
l
2.955 3.000 3.045 V
V
RTF4
Reset Threshold 4 (V
CC
Falling) S2 = Low : S1 = High : S0 = Low
l
2.808 2.850 2.892 V
V
RTF5
Reset Threshold 5 (V
CC
Falling) S2 = High : S1 = High : S0 = Low
l
2.660 2.700 2.740 V
V
RTF6
Reset Threshold 6 (V
CC
Falling) S2 = High : S1 = Low : S0 = Low
l
2.512 2.550 2.588 V
V
RTF7
Reset Threshold 7 (V
CC
Falling) S2 = High : S1 = Low : S0 = High
l
2.364 2.400 2.436 V
V
RTF8
Reset Threshold 8 (V
CC
Falling) S2 = High : S1 = High : S0 = High
l
2.217 2.250 2.283 V
ΔV
RTF
Reset Threshold Differential V
RTF(N+1)
– V
RTF(N)
(Note 3)
l
142 150 158 mV
V
RT(HYST)
Reset Threshold Hysteresis (V
CC
Rising) Relative to Any Selected Reset Threshold
l
4.5 5 6 %
t
UVR
Undervoltage Detect to RST Falling V
CC
Below Threshold by 1% (Note 3) 1 ms
Reset Thresholds (LTC2935-3/LTC2935-4)
V
RTF1
Reset Threshold 1 (V
CC
Falling) S2 = Low : S1 = Low : S0 = Low
l
2.404 2.440 2.476 V
V
RTF2
Reset Threshold 2 (V
CC
Falling) S2 = Low : S1 = Low : S0 = High
l
2.286 2.320 2.354 V
V
RTF3
Reset Threshold 3 (V
CC
Falling) S2 = Low : S1 = High : S0 = High
l
2.167 2.200 2.233 V
V
RTF4
Reset Threshold 4 (V
CC
Falling) S2 = Low : S1 = High : S0 = Low
l
2.049 2.080 2.111 V
V
RTF5
Reset Threshold 5 (V
CC
Falling) S2 = High : S1 = High : S0 = Low
l
1.931 1.960 1.989 V
V
RTF6
Reset Threshold 6 (V
CC
Falling) S2 = High : S1 = Low : S0 = Low
l
1.813 1.840 1.867 V
V
RTF7
Reset Threshold 7 (V
CC
Falling) S2 = High : S1 = Low : S0 = High
l
1.695 1.720 1.745 V
V
RTF8
Reset Threshold 8 (V
CC
Falling) S2 = High : S1 = High : S0 = High
l
1.576 1.600 1.624 V
ΔV
RTF
Reset Threshold Differential V
RTF(N+1)
– V
RTF(N)
(Note 3)
l
112 120 128 mV
V
RT(HYST)
Reset Threshold Hysteresis (V
CC
Rising) Relative to Any Selected Reset Threshold
l
4.5 5 6 %
t
UVR
Undervoltage Detect to RST Falling V
CC
Below Threshold by 1% (Note 3) 1 ms
Power-Fail Thresholds (LTC2935-1/LTC2935-2)
ΔV
PFT
Power-Fail Threshold Differential V
PFT(N)
– V
RTF(N)
Any Selected Reset Threshold (V
CC
Falling)
l
100 150 200 mV
V
PFT(HYST)
Power-Fail Threshold Hysteresis Relative to Any Selected Power-Fail Threshold
(V
CC
Rising)
l
2 2.5 3.5 %
t
UVP
Undervoltage Detect to PFO Falling V
CC
Below Threshold by 1% (Note 3) 1 ms
Power-Fail Thresholds (LTC2935-3/LTC2935-4)
ΔV
PFT
Power-Fail Threshold Differential V
PFT(N)
– V
RTF(N)
Any Selected Reset Threshold (V
CC
Falling)
l
70 120 170 mV
V
PFT(HYST)
Power-Fail Threshold Hysteresis Relative to Any Selected Power-Fail Threshold
(V
CC
Rising)
l
2 2.5 3 %
t
UVP
Undervoltage Detect to PFO Falling V
CC
Below Threshold by 1% (Note 3) 1 ms
Control Inputs: MR, S2, S1, S0
V
IN(TH)
Control Input Threshold S2, S1, S0
MR
l
l
0.3 • V
CC
0.4
0.7 • V
CC
1.4
V
V
t
PW
Input Pulse Width MR
l
20 μs
t
PD
Propagation Delay to RST Falling Manual Reset Falling
l
2520 μs
R
PU
Internal Pull-Up Resistance MR
l
600 900 1200 kΩ
I
LK
Input Leakage Current S2, S1, S0 = V
CC
or GND
l
±1 ±10 nA
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
CC
= 3.6V, unless otherwise noted. (Note 2)