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PDF V6155 Data sheet ( Hoja de datos )
| Número de pieza | V6155 | |
| Descripción | Extremely Accurate Power Surveillance | |
| Fabricantes | EM Microelectronic | |
| Logotipo |  |
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EM MICROELECTRONIC-MARIN SA
V6155
Extremely Accurate Power Surveillance,
Software Monitoring and Sleep Mode Detection
Features
n Can-bus sleep mode detector
n Standby mode, maximum current 50 mA
n Reset output guaranteed for VDD voltage
down to 1.2 V
n Comparator for voltage monitoring,voltage reference
1.275 V
n ± 1.2% voltage reference accuracy at +25 °C
n ± 2.5% voltage reference accuracy from
−40 to +85 °C (3 to 5.5 V)
n Programmable reset voltage monitoring
n Programmable power-on reset (POR) delay
n Watchdog with programmable time windows
guarantees a minimum time and a maximum time
between software clearing of the watchdog
n Time base accuracy ± 10%
n System enable output offers added security
n TTL / CMOS compatible
n -40 to +85 °C temperature range
n On request extended temperature range,
−40 to +125 °C
n DIP8 and SO8 packages
Description
The V6155 offers a high level of integration by voltage
monitoring and software monitoring in an 8 lead
package. A comparator monitors the voltage applied at
the VIN input comparing it with an internal 1.275 V
reference. The power-on reset function is initialized after
VIN reaches 1.275 V and takes the reset output inactive
after TPOR depending of external resistance. The reset
output goes active low when the VIN voltage is less than
1.275 V. The RES and EN outputs are guaranteed to be
in a correct state for a supply voltage as low as 1.2 V.
The watchdog function monitors software cycle time and
execution. If software clears the watchdog too quickly
(incorrect cycle time) or too slowly (incorrect execution),
it will cause the system to be reset. The system enable
output prevents critical control functions being activated
until software has successfully cleared the watchdog
three times. Such a security could be used to prevent
motor controls being energized on repeated resets of a
faulty system. If the microcontroller does not work that
means no signal on the TCL input the V6155 goes in a
standby mode (CAN-bus sleep detector).
Applications
n Automotive systems
n Cellular telephones
n Security systems
n Battery powered products
n High efficiency linear power supplies
n Industrial electronics
Typical Operating Configuration
VDD
V6155
R VIN
TCL
VSS
RES
EN
100 nF
GND
Pin Assignment
DIP8 / SO8
Fig. 1
EN
RES
TCL
VSS
V6155
VIN
R
VDD
NC
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Fig. 2
1
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Combined Voltage and Timer Reaction
VIN
VREF
TPOR=TWD
TOW
TCL
TCW+TOW
RES
TCW
EN
- Watchdog timer reset
12
TtoCoLearly
3
3 coErNregctoeTsCLacstievrevilcoew
Block Diagram
V6155
Condition:
VOUTPUT ≥ 3 V
TRI
TRIR
After 3 reset pulse periods
switch to R internal
Fig. 8
Enable
Logic
EN
VIN
R
R1 ≅ 1 MΩ
Voltage
Reference
VREF Comparator
−
+
Switch
Current
Controlled
Oscillator
Controller
Reset
Control
Timer
TCL
RES
Open drain
output RES
Fig. 9
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TWD Coefficient versus REXT at TA = +25 °C
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
0.88
0.86
10
REXT Coefficient versus TWD at TA = +25 °C
1.16
1.14
1.12
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
10
100
REXT [kΩ]
100
TWD [ms]
DataSheet4 U .com
V6155
1000
Fig. 20
1000
Fig. 21
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet V6155.PDF ] | |
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