參數(shù)資料
型號： MAX794
廠商： Maxim Integrated Products, Inc.
英文描述： 3.0V/3.3V Adjustable Microprocessor Supervisory Circuits(具有可調(diào)閾值監(jiān)控器、芯片使能和支持備用電池的復位器)
中文描述： 3.0V/3.3V可調(diào)、微處理器監(jiān)控電路
文件頁數(shù)： 4/20頁
文件大?。?/td> 211K
代理商： MAX794
M
3.0V /3.3V Adjustable Mic roproc essor
S upervisory Circ uits
4
_______________________________________________________________________________________
CONDITIONS
V
OL
V
V
OL
V
I
SINK
= 3.2mA, V
CC
= V
RST
max
MAX79_E, V
BATT
= V
CC
= 1.2V, I
SINK
= 200μA
BATT ON Output
Voltage Low
MAX79_C, V
BATT
= V
CC
= 1.0V, I
SINK
= 40μA
0.2V
CC
RESET Output Voltage Low
UNITS
MIN
TYP
0.13
MAX
0.3
SYMBOL
PARAMETER
V
IL
V
t
MR
t
MD
ns
ns
μA
MAX793/MAX794 only
MAX793/MAX794 only
V
RST
max < V
CC
< 5.5V
MR Pulse Width
MR-to-Reset Delay
MR Pull-Up Current
CHIP-ENABLE GATING
100
50
75
All Inputs Including PFO
(Note 10)
MANUAL RESET INPUT
0.3V
CC
V
IH
0.7V
CC
0.17
0.3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.17V to 5.5V for the MAX793T/MAX795T, V
CC
= 3.02V to 5.5V for the MAX793S/MAX795S, V
CC
= 2.72V to 5.5V for the
MAX793R/MAX794/MAX795R, V
BATT
= 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
MAX793/MAX794 only, MR = 0V
25
70
250
250
ns
V
CC
= V
RST
max, Figure 9
Enable mode, V
CC
= V
RST
max
CE IN-to-CE OUT
Propagation Delay
Disable mode
2
7
CE IN-to-CE OUT
Resistance
V
OH
V
OL
V
V
CC
= V
RST
max, I
OUT
= 1.6mA,
V
CE IN
= 0V
V
CC
= V
RST
max, I
OUT
= -1mA,
V
CE IN
= V
CC
CE OUT Drive from CE IN
0.2V
CC
0.8V
CC
nA
46
I
LEAK
±10
CE IN Leakage Current
Note 1:
V
CC
supply current, logic input leakage, watchdog functionality (MAX793/MAX794), MR functionality (MAX793/MAX794),
PFI functionality (MAX793/MAX794), state of RESET and RESET (MAX793/MAX794) tested at V
BATT
= 3.6V and V
CC
= 5.5V.
The state of RESET is tested at V
CC
= V
CC
min.
Note 2:
Tested at V
BATT
= 3.6V, V
CC
= 3.5V and 0V. The battery current will rise to 10μA over a narrow transition window around
V
CC
= 1.9V.
Note 3:
Leakage current into the battery is tested under the worst-case conditions at V
CC
= 5.5V, V
BATT
= 1.8V and V
CC
= 1.5V,
V
BATT
= 1.0V.
Note 4:
Guaranteed by design.
Note 5:
When V
SW
> V
CC
> V
BATT
, OUT remains connected to V
CC
until V
CC
drops below V
BATT
. The V
CC
-to-V
BATT
comparator
has a small 15mV typical hysteresis to prevent oscillation. For V
CC
< 1.75V (typical), OUT switches to BATT regardless of
V
BATT
.
Note 6:
When V
BATT
> V
CC
> V
SW
, OUT remains connected to V
CC
until V
CC
drops below the battery switch threshold (V
SW
).
Note 7:
OUT switches from BATT to V
CC
when V
CC
rises above the reset threshold, if V
BATT
> V
RST
. In this case, switchover back
to V
CC
occurs at the exact voltage that causes reset to be asserted, however switchover occurs 200ms prior to reset. If
V
BATT
< V
RST
, OUT switches from BATT to V
CC
when V
CC
exceeds V
BATT
.
Note 8:
The reset threshold tolerance is wider for V
CC
rising than for V
CC
falling to accommodate the 10mV typical hysteresis,
which prevents internal oscillation.
Note 9:
The leakage current into or out of the RESET pin is tested with RESET not asserted (RESET output high impedance).
Note 10:
PFO is normally an output, but is used as an input when activating the battery freshness seal.
μs
10
Reset to CE OUT High Delay
CE OUT Output Voltage
High (reset active)
WATCHDOG (MAX793/MAX794 only)
t
WD
sec
ns
0V < V
CC
< 5.5V
Watchdog Timeout Period
WDI Pulse Width
I
OH
= 500μA, V
CC
< 2.3V
μA
1.00
1.00
1.60
2.25
-1
0.01
1
WDI Input Current
V
V
OH
0.8V
BATT
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參數(shù)描述
MAX794CPE 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX794CPE+ 功能描述:監(jiān)控電路 3/3.3/AdjV MPU Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX794CSE 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX794CSE+ 功能描述:監(jiān)控電路 3/3.3/AdjV MPU Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX794CSE+T 功能描述:監(jiān)控電路 3/3.3/AdjV MPU Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
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