STM6778 _ ST 代理商WOSENDONGLI 代理意法STM6778

STM6778 漏极开路微处理器复位

The STM6717/STM6718/STM6719/STM6720 and STM6777/STM6778/STM6779/STM6780 supervisors are a family of low voltage/low supply current processor (Micro or DSP) supervisors, designed to monitor two (or three) system power supply voltages. They are targeted at applications such as Set-Top Boxes (STBs), portable, battery-powered systems, networking, and communication systems.

All device options have a push-button-type manual reset input (MR). The STM6777/78/79/80 also includes an option which enables the user to delay the start of the Manual Reset process from 6μs (MRC pin left open) or more with external capacitor. The delay is implemented by connecting the appropriately sized capacitor between the MRC pin and VSS (typical 4s delay with a 3.3μF capacitor, see Table 7 on page 21).

Two of the three supplies monitored (VCC1 and VCC2) have fixed (customer-selectable, factory-trimmed) thresholds (VRST1 and VRST2). The third voltage is monitored using an externally adjustable RSTIN threshold (0.626V internal reference).

If any of the three monitored voltages drop below its factory-trimmed or adjustable thresholds, or if MR is asserted to logic low, a RST is asserted (driven low). Once asserted, RST is maintained at Low for a minimum delay period (trec) after ALL supplies rise above their respective thresholds and MR returns to High. These devices are guaranteed to be in the correct reset output logic state when VCC1 and/or VCC2 is greater than 0.8V.

These devices are available in a standard 5-pin or 6-pin SOT23 packages (see Table 1 on page 1).

STM6778 订购型号

Ordering Model	Package	Voltage Reset 1(VRST1)	Voltage Reset 2(VRST2)	Operating Temperature	Operating Temperature
		typ	typ	min	max
		V	V	°C	°C
STM6778SFWB6F	SOT 23 - 6L	2.925	1.05	-40	85
STM6778SVWB6F	SOT 23 - 6L	2.925	1.575	-40	85
STM6778SYWB6F	SOT 23 - 6L	2.925	2.188	-40	85
STM6778TGWB6F	SOT 23 - 6L	3.075	1.11	-40	85
STM6778TWWB6F	SOT 23 - 6L	3.075	1.665	-40	85
STM6778TZWB6F	SOT 23 - 6L	3.075	2.313	-40	85

STM6778 特性:

Primary supply (VCC1) monitor. Fixed (factoryprogrammed) reset thresholds: 4.63V to 1.58V
Secondary supply (VCC2) monitor (STM6717/18/19/20/77/78).
Fixed (factory-programmed) reset thresholds: 3.08V to 0.79V
Tertiary supply monitor (using externally adjustable rstin):
0.626V internal reference
RST outputs (push-pull or open drain); state guaranteed IF VCC1 OR VCC2 ≥ 0.8V
Reset delay time (trec) on power-up: 210ms, 900ms (typ)
Manual reset input (MR)
Optional delayed manual reset input (MRC) with external capacitor (STM6777/78/79/80)
Low supply current - 11μA (typ), VCC1 = VCC2 = 3.6V
Operating temperature: –40°C to 85°C (industrial grade)

STM6778 漏极开路微处理器复位

STM6778 订购型号

STM6778 特性:

STM6778 技术支持与电子电路设计开发资源下载