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TC1271ALBVRCTR View Datasheet(PDF) - Microchip Technology

Part NameTC1271ALBVRCTR Microchip
Microchip Technology Microchip
DescriptionVoltage Supervisor with Manual Reset Input


TC1271ALBVRCTR Datasheet PDF : 40 Pages
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TC1270A/70AN/71A
1.1.2 TIMING DIAGRAMS AND SPECIFICATIONS
FIGURE 1-2:
MR
MR PIN AND RESET PIN WAVEFORM
tMR
RST
tMRNI
tRST
tMD
RST
FIGURE 1-3:
DEVICE VOLTAGE AND RESET PIN (ACTIVE LOW) WAVEFORM
VTRIP
VTRIP(MAX)
VTRIP(MIN)
VDD
1V
tRST
tRD
tRST
RST(1)
RST
VDD < 1V is outside the device operating specification. The RST (or RST) output state is unknown while VDD < 1V.
Note 1: The TC1270AN requires an external pull-up resistor.
TABLE 1-1: RESET AND DEVICE RESET TIMER REQUIREMENTS
Electrical Characteristics: Unless otherwise noted, VDD = 5V for L/M versions, VDD = 3.3V for T/S versions,
VDD = 3V for R version, TA = -40°C to +125°C. Typical values are at TA = +25°C.
Parameter
Sym
Min Typ(1) Max Units
Test Conditions
VDD to Reset Delay
Reset Active
Timeout
Period
TC127XAxBVyy (3)
TC127XAxCVyy (3)
TC127XAxVyy (3)
tRD
tRST
50
1.09 2.19 4.38
17.5
35
70
140
280
560
µs VDD = VTRIP(MAX) to
VTRIP(MIN) –125 mV
ms VDD = VTRIP(MAX)
ms VDD = VTRIP(MAX)
ms VDD = VTRIP(MAX)
MR Minimum Pulse Width
tMR
10
µs
MR Noise Immunity
tMRNI
0.1
µs
MR to Reset Propagation Delay
tMD
0.2
µs
Note 1: Unless otherwise stated, data in the Typical (“Typ”) column is at 5V, +25°C.
2: RST output for TC1270A, RST output for TC1271A.
3: TC127XA refers to either the TC1270A, TC1270AN or TC1271A device. “x” indicated the selected Voltage
Trip Point, while “yy” indicates the package code.
© 2007 Microchip Technology Inc.
DS22035B-page 5
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General Description
For many of today’s microcontroller applications, care must be taken to prevent low-power conditions that can
cause many different system problems. The most common causes are brown-out conditions, where the system supply drops below the operating level momentarily. The second most common cause is when a slowly decaying power supply causes the microcontroller to begin executing instructions without sufficient voltage to sustain volatile memory (RAM), thus producing indeterminate results.

Features:
• Precision voltage monitor
- 2.63V, 2.93V, 3.08V, 4.38V and 4.63V trip points (Typical)
• Manual Reset input
• Reset Time-out Delay:
- Standard: 280 ms (Typical)
- Optional: 2.19 ms, and 35 ms (Typical)
• Power Consumption ≤15 µA max
• No glitches on outputs during power-up
• Active Low Output Options:
- Push-Pull Output and Open-Drain Output
• Active High Output Option:
- Push-Pull Output
• Replacement for (Specification compatible with):
- TC1270, TC1271
- TCM811, TCM812
• Fully static design
• Low voltage operation (1.0V)
• ESD protection:
- ≥4 kV Human Body Model (HBM)
- ≥400V Machine Model (MM)
• Extended (E) Temperature range:
-40°C to +125°C
• Package Options:
- 4-lead SOT-143
- 5-lead SOT-23
- Pb-free Device

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