- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄231479 > V6319MSP3B+ 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 PDF資料下載
參數(shù)資料
| 型號(hào)： | V6319MSP3B+ |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | GREEN, SOT-23, 3 PIN |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 708K |
| 代理商： | V6319MSP3B+ |
R
V6309
V6319
Copyright 2006, EM Microelectronic-Marin SA
03/06 – rev.G
4
www.emmicroelectronic.com
Application Information
Negative-Going VDD Transients
In addition to issuing a reset to the microprocessor during
power-up, power-down and brownout conditions, the
V6309/V6319 are relatively immune to short duration
negative-doing VDD transients (glitches).
Fig. 8 shows
typical transient duration vs. Reset comparator overdrive,
for which the V6309/V6319 do not generate a reset pulse.
The graph was generated using a negative-going pulse
applied to VDD, starting 0.5V above the actual reset
threshold and ending below it by the magnitude indicated
(reset comparator overdrive).
The graph indicates the
maximum pulse width a negative-going VDD transient can
have without causing a reset pulse. As the magnitude of
the transient increases (goes farther below the reset
threshold), the maximum allowable pulse width decreases.
Typically, for the V6309L and V6319M, a VDD transient that
goes 100V below the reset threshold and lasts 20s or less
will not cause a reset pulse. A 0.1F bypass capacitor
mounted as close as possible to the VDD pin provides
additional transient immunity.
Max. Transient Duration without causing a Reset Pulse
versus Reset Comparator Overdrive
Fig .9
Ensuring a Valid Reset Output down to VDD = 0V
When VDD falls below 1V, the V6309 RESET output no
longer sinks current, it becomes an open circuit.
Therefore, high-impedance CMOS logic inputs connected
to RESET can drift to undetermined voltages.
This
presents no problem in most applications, since most P
and other circuitry is inoperative with VDD below 1V.
However, in applications where
RESET must be valid
down to 0V, adding a pull-down resistor to
RESET causes
any stray leakage currents to flow to ground, holding
RESET low (Fig. 10). R1's value is not critical; 100 k
is
large enough not to load
RESET and small enough to pull
RESET to ground. A 100 k
pull-up resistor to VDD is also
recommended for the V6319, if RESET is required to
remain valid for VDD < 1V.
RESET Valid for VDD = Ground Circuit
VDD
VSS
RES
V6309
100 k
Fig. 10
Interfacing to Ps with Bidirectional Reset Pins
Microprocessors with bidirectional reset pins (such as the
Motorola 68HC11 series) can connect to the V6309 reset
output. If, for example, the V6309
RESET output is
asserted high and the P wants to pull it low, indeterminate
logic levels may result. To correct this, connect a 4.7 k
resistor between the V6309
RESET and the P reset I/O
(Fig. 11). Buffer the V6309
RESET output to other system
components.
Interfacing to Ps with Bidirectional Reset I/O
VDD
VSS
V6309
P
Buffer
4.7 kO
Buffer RES to
other system
components
RES
Fig. 11
Benefits of Highly Accurate Reset Threshold
Most P supervisor ICs have reset threshold voltages
between 5% and 10% below the value of nominal supply
voltages. This ensures a reset will not occur within 5% of
the nominal supply, but will occur when the supply is 10%
below nominal. When using ICs rated at only the nominal
supply ±5%, this leaves a zone of uncertainty where the
supply is between 5% and 10% low, and where the reset
may or may not be asserted.
The V6209/T and V6319/T use highly accurate circuitry to
ensure that reset is asserted close to the 5% limit, and long
before the supply has declined to 10% below nominal.
4.7k
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| V24A5C400AS | 1-OUTPUT 400 W DC-DC REG PWR SUPPLY MODULE |
| V24A5H400AS | 1-OUTPUT 400 W DC-DC REG PWR SUPPLY MODULE |
| V24A5M400AN3 | 1-OUTPUT 400 W DC-DC REG PWR SUPPLY MODULE |
| VI-ARM-M1S | 1-OUTPUT 500 W AC-DC REG PWR SUPPLY MODULE |
| VI-882627 | 1-OUTPUT 200 W DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| V6319RSP3B | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:3-Pin Microprocessor Reset Circuit |
| V6319SSP3B | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:3-Pin Microprocessor Reset Circuit |
| V6319TSP3B | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:3-Pin Microprocessor Reset Circuit |
| V631B20H-00000-000 | 制造商:Carling Technologies 功能描述:V-SERIES ROCKER SWITCH - Bulk |
| V631D11B-1RR00-000 | 制造商:Carling Technologies 功能描述:V-SERIES ROCKER SWITCH - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。