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參數(shù)資料
| 型號： | MAX6738XKTD7-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Low-Power Dual-/Triple-Voltage SC70 UP Supervisory Circuits |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | EIAJ, SC-70, 5 PIN |
| 文件頁數(shù)： | 13/16頁 |
| 文件大小： | 209K |
| 代理商： | MAX6738XKTD7-T |
M
Low-Power Dual-/Triple-Voltage SC70 μP
Supervisory Circuits
______________________________________________________________________________________
13
Functional Diagram
V
CC
1
V
CC
2
RSTIN/PFI
V
CC
1
V
CC
1
V
CC
1
RESET
TIMEOUT
PERIOD
V
CC
2
POK1
RESET
RESET
OUTPUT
0.488V
1.23V
MR
PULLUP
MR
MAX6736–
MAX6745
PFO
DELAY
The MAX6741/MAX6744 offer a V
CC
1 POK (POK1) ideal
for V
CC
1-to-V
CC
2 sequencing. POK1 remains low as
long as V
CC
1 is below its V
TH
1 threshold. When V
CC
1
exceeds V
TH
1 for the POK1 timeout period (t
POKP
), the
open-drain POK1 output is deasserted. The POK1 output
can then enable the V
CC
2 power supply (use an external
POK1 pullup resistor).
RESET
is deasserted when both
V
CC
1 and V
CC
2 remain above their selected thresholds
for the reset timeout period (t
RP
). The POK1 output can
be used for I/O before core or core before I/O sequenc-
ing, depending on the selected V
CC
1/V
CC
2 thresholds.
See the
Typical Application Circuit
and Figure 1.
Monitoring a Negative Voltage
The power-fail comparator can be used to monitor a
negative supply voltage using the circuit shown in
Figure 4. When the negative supply is valid,
PFO
is low.
When the negative supply voltage drops,
PFO
goes
high. The circuit
’
s accuracy is affected by the PFI
threshold tolerance, V
CC
, R1, and R2.
Transient Immunity
The MAX6736
–
MAX6745 supervisors are relatively
immune to short-duration falling V
CC
transients (glitch-
es). It is usually undesirable to reset the μP when V
CC
experiences only small glitches. The
Typical Operating
Characteristics
show Maximum V
CC
1/V
CC
2 Transient
Duration vs. Reset Threshold Overdrive, for which reset
pulses are not generated. The graph shows the maxi-
mum pulse width that a falling V
CC
transient might typi-
cally have without causing a reset pulse to be issued.
As the amplitude of the transient increases, the maxi-
mum allowable pulse width decreases. A 0.1μF bypass
capacitor mounted close to the V
CC
pin provides addi-
tional transient immunity.
Chip Information
TRANSISTOR COUNT: 249
PROCESS: BiCMOS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6738XKVD3 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER DUAL-/TRIPLE-VOLTAGE SC70 MICROPROC - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX6738XKVD3+ | 制造商:Maxim Integrated Products 功能描述:MAXIM MAX6738XKVD3+ PROCESSOR SUPERVISORS - Boxed Product (Development Kits) 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:Maxim MAX6738XKVD3+ Processor Supervisors |
| MAX6738XKVD3+T | 功能描述:監(jiān)控電路 Fixed, R/C Adj A-Low O-Drain 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6738XKVD3-T | 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6738XKVD7 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER DUAL-/TRIPLE-VOLTAGE SC70 - Rail/Tube |
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