LTC2902-2CGN Linear Technology, LTC2902-2CGN Datasheet - Page 7

• Manufacturer Part Number: LTC2902-2CGN
• Description: IC MON SUPP QD W/RST&SEL 16-SSOP
• Manufacturer: Linear Technology
• Type: Multi-Voltage Supervisorr

Specifications of LTC2902-2CGN

• Number Of Voltages Monitored: 4
• Output: Push-Pull, Totem Pole
• Reset: Active Low
• Reset Timeout: 5 ms Minimum
• Voltage - Threshold: 16 Selectable Threshold Combinations
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S
COMP3 (Pin 1): Comparator Output 3. Nondelayed, active
high logic output with weak pull-up to V2. Pulls high when
V3 is above reset threshold. May be pulled greater than V2
using external pull-up.
COMP1 (Pin 2): Comparator Output 1. Nondelayed, active
high logic output with weak pull-up to V2. Pulls high when
V1 is above reset threshold. May be pulled greater than V2
using external pull-up.
V3 (Pin 3): Voltage Input 3. Select from 2.5V, 1.8V, 1.5V
or ADJ. See Table 1 for details.
U
U
20
18
16
14
12
10
20
18
16
14
12
10
0
8
6
4
2
8
6
0
4
2
1
COMPX Pull-Up Current
vs V2 (COMPX Held at 0V)
2
RST Pull-Up Current vs V2
(LTC2902-1)
U
T
T
V
A
A
RT25
= 25 C
1.5
= 25 C
2.5
V
RT30
2
V
W
RT33
3
2.5
V2 (V)
V2 (V)
U
3.5
3
3.5
4
4
4.5
4.5
2902 G21
2902 G23
5
5
V1 (Pin 4): Voltage Input 1. Select from 5V or 3.3V. See
Table 1 for details. The greater of (V1, V2) is also V
the chip. Bypass this pin to ground with a 0.1 F (or
greater) capacitor.
CRT (Pin 5): Reset Delay Time Programming Pin. Attach
an external capacitor (C
of 4.6ms/nF. Leaving the pin open generates a minimum
delay of approximately 50 s. A 47nF capacitor will gener-
ate a 216ms reset delay time.
250
200
150
100
50
0
6
5
4
3
2
1
0
10
2
COMPX Propagation Delay vs
Input Overdrive Above Threshold
RST Pull-Up Current vs V2
(LTC2902-2)
INPUT OVERDRIVE ABOVE THRESHOLD (mV)
T
V
A
RT25
= 25 C
2.5
V
RT30
V
RT33
3
V2 (V)
RT
100
3.5
V1, V2
V3, V4
) to GND to set a reset delay time
4
T
A
4.5
= 25 C
2902 G22
2902 G24
1000
5
LTC2902
CC
7
2902f
for