STM6780 datasheet(10/30 Pages) STMICROELECTRONICS

tên linh kiện	STM6780

Giải thích chi tiết về linh kiện	Dual/triple ultra-low voltage supervisors

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Operation

STM6717/6718/6719/6720/STM6777/6778/6779/6780

10/30

Doc ID 11469 Rev 8

2

Operation

2.1

Applications information

1.

Interfacing to processors with bi-directional reset pins

Most processors with bi-directional reset pins can interface directly to the open drain

RST outputs (STM6717/19/77/79). Systems simultaneously requiring a push-pull RST

output and a bi-directional reset interface can be in logic contention. To prevent this

contention, connect a 4.7 k

Ω resistor between RST and the processor’s reset I/O as

shown in Figure 11.

2.

Ensuring a valid RST output down to VCC =0 V

The STM67xx supervisors are guaranteed to be in the correct RST output logic state

when VCC1 and/or VCC2 is greater than 0.8 V. In applications which require valid reset

levels down to VCC = 0, a pull-down resistor to active-low outputs (push-pull only, see

Figure 12) will ensure that the reset line is valid while the reset output can no longer

sink or source current. This scheme does NOT work with the open drain outputs of the

STM6717/19/77/79.

The resistor value used is not critical, but it must be large enough not to load the reset

output when VCC is above the reset threshold. For most applications, 100 kΩ is

adequate.

Figure 11.

STM67xx interface to processor with bi-directional reset pins

Figure 12.

Ensuring RST valid to VCC = 0 (active-low, push-pull outputs)

AI10425

VCC1

VCC2

VSS

VCC1

STM67xx

RST

To other

system

components

4.7k

Ω

VCC2

VSS

Processor

RESET

AI10426

VCC1

VSS

STM67xx

RST

R1

Số phần tương tự - STM6780

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	STM6780	351Kb / 25P	Dual/Triple Ultra-Low Voltage Supervisors with Push-Button Reset (with Delay Option)
	STM6780	251Kb / 29P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
	STM6780	664Kb / 30P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
	STM6780	643Kb / 30P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
	STM6780	643Kb / 30P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)

More results

Mô tả tương tự - STM6780

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	STM6718SFWY6F	643Kb / 30P	Dual/triple ultra-low voltage supervisors
	STM6717	351Kb / 25P	Dual/Triple Ultra-Low Voltage Supervisors with Push-Button Reset (with Delay Option)
	STM6779YWB6F	643Kb / 30P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
	STM6717TWWY6F	643Kb / 30P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
	STM6717	664Kb / 30P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
	STM6717	251Kb / 29P	Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
Maxim Integrated Produc...	MAX16134	661Kb / 23P	Low-Voltage, Precision, Single/Dual/Triple/Quad-Voltage 關P Supervisors Rev 0; 11/16
	MAX6880	422Kb / 19P	Dual-/Triple-Voltage, Power-Supply Sequencers/Supervisors Rev 1; 10/05
	MAX6717UKSVD3-T	720Kb / 19P	Dual/Triple Ultra-Low-Voltage SOT23 Rev 5; 12/05
	MAX6877	307Kb / 24P	Dual-/Triple-Voltage, Power-Supply Trackers/Sequencers/Supervisors Rev 0; 7/05

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