参数资料
型号: STM6778YHWB6E
厂商: STMICROELECTRONICS
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6
封装: LEAD FREE, MO-178CAA, SOT-23, 6 PIN
文件页数: 28/29页
文件大小: 246K
代理商: STM6778YHWB6E
Summary description
STM6717/6718/6719/6720/STM6777/6778/6779/6780
VCC1. It can be driven from a TTL or CMOS logic line, or with open drain/collector outputs,
or connected to VSS through a switch. If unused, leave this pin open or connect it to VCC1.
Connect a normally open momentary switch from MR to VSS; external debounce circuitry is
not required. (If MR is driven from long cables or if the device is used in noisy environments,
connecting a 0.1F capacitor from MR to VSS provides additional noise immunity.
Manual Reset Delay Input (MRC) - STM6777/78/79/80)
This pin is either left open or connected to VSS via a capacitor. By selecting the appropriate
capacitor, the manual reset process, initiated by pressing the push-button Manual Reset
Input, can be delayed by any value from 6s or more (see Table 7 on page 21).
Primary Supply Voltage Monitoring Input (VCC1)
It also is the input for the primary reset threshold monitor. Available fixed (customer-
selectable, factory-programmed) reset thresholds include 4.63V to 1.58V.
Secondary Supply Voltage Monitoring Input (VCC2)
This function is available on the STM6717/18/19/20/77/78. Fixed (customer-selectable,
factory-programmed) reset thresholds include 3.08V to 0.79V.
Adjustable Reset Comparator Input (RSTIN; STM6719/20/79/80)
This is a high impedance input. RST is driven low when the voltage at the RSTIN pin falls
below 0.626V (internal reference voltage at this comparator). The monitored voltage reset
threshold is set with an external resistor-divider network.
Table 3.
Pin functions
Pin
Name
Function
STM6717
STM6718
STM6719
STM6720
STM6777
STM6778
STM6779
STM6780
1111
RST
Active-low reset output
3333
MR
Push-button reset input
––54
MRC
Manual reset delay input
5666
VCC1 Primary supply voltage input
444–
VCC2 Secondary supply voltage input
–5–5
RSTIN Adjustable reset comparator input
2222
VSS
Ground
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