TC1279 Microchip Technology, TC1279 Datasheet - Page 5

• Manufacturer Part Number: TC1279
• Description: (TC1278) 3-Pin Reset Monitors for 5V Systems
• Manufacturer: Microchip Technology

3.2
The TC1278/TC1279 provides accurate V
ing and reset timing during power-up, power-down,
and brownout/sag conditions, and rejects negative-
going transients (glitches) on the power supply line.
Figure 3-5 shows the maximum transient duration vs.
maximum negative excursion (overdrive) for glitch
rejection. Any combination of duration and overdrive
that lays under the curve will not generate a reset
signal. Combinations above the curve are detected as
a brownout or power-down. Transient immunity can be
improved by adding a capacitor in close proximity to the
V
©
CC
2002 Microchip Technology Inc.
pin of the TC1278/TC1279.
V
CC
Transient Rejection
CC
monitor-
FIGURE 3-5:
5
4
3
2
1
0
V
1
CC
T
RESET COMPARATOR OVERDRIVE,
A
TC1278/TC1279
°C
[
V
MAXIMUM TRANSIENT
DURATION VS.
OVERDRIVE FOR GLITCH
REJECTION AT 25°C
5
CCTP
Duration
- V
TC1278/9
CC
]
100
Overdrive
(mV)
DS21384B-page 5
V
CCTP
1000