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台湾致新G674 G675
G674 G675 台湾致新代理商 GMT 重置系列 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
