參數(shù)資料
型號(hào)： X40020S14-C
廠商： INTERSIL CORP
元件分類： 電源管理
英文描述： Dual Voltage Monitor with Intergrated CPU Supervisor
中文描述： 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14
封裝： 0.150 INCH, SOIC-14
文件頁(yè)數(shù)： 6/24頁(yè)
文件大?。?/td> 346K
代理商： X40020S14-C
6
FN8112.0
March 28, 2005
Resetting the V
TRIPx
Voltage
To reset a V
TRIPx
voltage, apply the programming volt-
age (Vp) to the WDO pin before a START condition is
set up on SDA. Next, issue on the SDA pin the Slave
Address A0h followed by the Byte Address 03h for
V
TRIP1
and 0Bh for V
TRIP2
, followed by 00h for the Data
Byte in order to reset V
TRIPx
. The STOP bit following a
valid write operation initiates the programming
sequence. Pin WDO must then be brought LOW to
complete the operation.
After being reset, the value of V
TRIPx
becomes a nominal
value of 1.7V or lesser.
Note:
This operation does not corrupt the registers.
System Battery Switch
As long as V
CC
exceeds the low voltage detect thresh-
old V
TRIP
, V
OUT
is connected to V
CC
through a 5
(typi-
cal) switch. When the V
CC
has fallen below V1
TRIP
,
then V
CC
is applied to V
OUT
if V
CC
is or equal to or
greater than V
BATT
- 0.03V. When V
CC
drops to less
than V
BATT
- 0.03V, then V
OUT
is connected to V
BATT
through an 80
(typical) switch. V
OUT
typically supplies
the system static RAM voltage, so the switchover circuit
operates to protect the contents of the static RAM dur-
ing a power failure. Typically, when V
CC
has failed, the
SRAMs go into a lower power state and draw much less
current than in their active mode. When V
CC
returns,
V
OUT
switches back to V
CC
when V
CC
exceeds V
BATT
+
0.03V. There is a 60mV hysteresis around this battery
switch threshold to prevent oscillations between sup-
plies.
While V
CC
is connected to V
OUT
the BATT-ON pin is
pulled LOW. The signal can drive an external PNP tran-
sistor to provide additional current to the external circuits
during normal operation.
Operation
The device is in normal operation with V
CC
as long as
V
CC
> V
TRIP1
. It switches to the battery backup mode
when V
CC
goes away.
Control Register
The Control Register provides the user a mechanism for
changing the Block Lock and Watchdog Timer settings.
The Block Lock and Watchdog Timer bits are nonvolatile
and do not change when power is removed.
The Control Register is accessed with a special pream-
ble in the slave byte (1011) and is located at address
1FFh. It can only be modified by performing a byte write
operation directly to the address of the register and only
one data byte is allowed for each register write operation.
Prior to writing to the Control Register, the WEL and
RWEL bits must be set using a two step process, with
the whole sequence requiring 3 steps. See "Writing to
the Control Registers" on page 8.
The user must issue a stop, after sending this byte to the
register, to initiate the nonvolatile cycle that stores WD1,
WD0, PUP1, and PUP0. The X40020 will not acknowl-
edge any data bytes written after the first byte is entered.
The state of the Control Register can be read at any time
by performing a random read at address 01Fh, using the
special preamble. Only one byte is read by each register
read operation. The master should supply a stop condi-
tion to be consistent with the bus protocol, but a stop is
not required to end this operation.
RWEL: Register Write Enable Latch (Volatile)
The RWEL bit must be set to “1” prior to a write to the
Control Register.
Figure 5. Sample V
TRIP
Reset Circuit
Condition
V
CC
> V
TRIP1
V
CC
> V
TRIP1
&
V
BATT
= 0
0
≤
V
CC
≤
V
TRIP1
and V
CC
< V
BATT
Mode of Operation
Normal Operation
Normal Operation without battery
backup capability
Battery Backup mode; RESET
signal is asserted. No communica-
tion to the device is allowed.
7
6
5
4
0
3
0
2
1
0
PUP1 WD1
WD0
RWEL WEL PUP0
1
6
2
7
14
13
9
8
X40020
V
TRIP1
Adj.
V
P
RESET
4.7K
SDA
SCL
μC
Adjust
Run
V2FAIL
V
TRIP2
Adj.
X40020, 40021
相關(guān)PDF資料
PDF描述
X40020S14I-A Dual Voltage Monitor with Intergrated CPU Supervisor
X40020S14I-B Dual Voltage Monitor with Intergrated CPU Supervisor
X40020S14I-C Dual Voltage Monitor with Intergrated CPU Supervisor
X40020V14-A DIODE, STANDARD, 165A, 400V, STUD; Voltage, Vrrm:400V; Current, If av:165A; Case style:E14; Current, Ifs max:2500A; Diode type:Standard recovery; Polarity, diode:Stud Anode; Thread size:M12; Voltage, forward at If:1.5V RoHS Compliant: Yes
X40020V14-B DIODE, STUD 165A 1200VDIODE, STUD 165A 1200V; Voltage, Vrrm:1200V; Current, If av:165A; Current, Ifs max:2500A; Voltage, forward at If:1.5V; Case style:E14; Thread size:M12; Diode type:Standard recovery; Polarity, diode:Stud C
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
X40020S14-CT1 功能描述:IC VOLTAGE MONITOR DUAL 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:- 復(fù)位:低有效 復(fù)位超時(shí):最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
X40020S14IA 制造商:Rochester Electronics LLC 功能描述:- Bulk
X40020S14I-A 功能描述:IC VOLTAGE MONITOR DUAL 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:- 復(fù)位:低有效 復(fù)位超時(shí):最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
X40020S14I-AT1 功能描述:IC VOLTAGE MONITOR DUAL 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:- 復(fù)位:低有效 復(fù)位超時(shí):最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
X40020S14I-B 功能描述:IC VOLTAGE MONITOR DUAL 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:- 復(fù)位:低有效 復(fù)位超時(shí):最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
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