G674 G675 台湾致新代理商 GMT 复位芯片系列 延迟时间可调
Microprocessor Reset IC

Part Number	Vin (V)min.	Vin (V) max.	Detecting Voltage (V)	ICD source(uA)	VTCD(V)	Isupply(uA)	Note	Package
G674/5	0.8	5.5	2.0/2.2/2.4	0	0.5	35	G674H/L Push-Pull High/Low Output G675L Open-Drain Output TCD (ms) = 6,740 × CD (uF)	SOT-23-5/ TDFN2X2-6

 

General Description
The  G674/G675  are  microprocessor  (μP)  supervisory  circuits  used  to  monitor  the  power  supplies  in  μP  and  digital  systems.  They  provide  excellent  circuit  reliability  and  low  cost  and  adjustments  when  used  with  +2.5V,  +3.0V powered circuits.

These circuits perform a single function: they assert a reset signal  whenever  the  VCC  supply  voltage  declines  below  a  preset  threshold,  with  hysteresis  keeping  it  asserted  for  time  delay  determined  by  externally  programmable  time  delay generator after VCC has risen above the reset thresh-old. Reset thresholds suitable for operation with a variety of supply voltages are available.

The  G675L  has  an  open-drain  output  stage,  while  the  G674  have  push-pull  outputs.  The  G675L’s  open-drain  RESEToutput  requires  a  pull-up  resistor  that  can  be  connected to a voltage higher than VCC. The G674L have an  active-low  RESEToutput,  while  the  G674H  has  an  active-high  RESET  output.  The  reset  comparator  is  de-signed  to  ignore  fast  transients  on  VCC,  and  the  outputs  are  guaranteed  to  be  in  the  correct  logic  state  for  VCCdown to 0.8V.

Low supply current makes the G674/G675 ideal for use in portable  equipment.  The  G674/G675  are  available  in  5-pin SOT-23-5 and 6 pin TDFN2X2packages.

Features
„Precision Monitoring of +2.5V and +3V Power-Supply Voltages
„Fully Specified Over Temperature „
Available in Three Output Configurations
Push-Pull RESET Output (G674L)
Push-Pull RESET Output (G674H)
Open-Drain RESET Output (G675L)„
Externally Programmable Time Delay Generator „
14μA Supply Current „
Guaranteed Reset Valid to VCC = 0.8V „
Power Supply Transient Immunity „
5 pin SOT-23-5 and 6 pin TDFN2X2 Packages
„2% Threshold Accuracy

Applications „
Computers
„Controllers
„Intelligent Instruments
„Critical μP and μC Power Monitoring „
Portable / Battery-Powered Equipment „
Automotive

Ordering Information

ORDER NUMBER	TEMP. RANGE	PACKAGE (Green)
G674HxxxT1U	~40°C to 105°C	SOT-23-5
G674LxxxT1U	~40°C to 105°C	SOT-23-5
G675LxxxT1U	~40°C to 105°C	SOT-23-5
G674HxxxRB1U	~40°C to 105°C	TDFN2X2-6
G674LxxxRB1U	~40°C to 105°C	TDFN2X2-6
G675LxxxRB1U	~40°C to 105°C	TDFN2X2-6

* xxx specifies the threshold voltage.  
e.g. 240 denotes the 2.4V threshold voltage.

Pin  Configuration                                                                                                                                        Typical  Application  Circuit

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