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ICL7667 Datasheet(PDF) 4 Page - Intersil Corporation |
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ICL7667 Datasheet(HTML) 4 Page - Intersil Corporation |
4 / 8 page 4 FN2853.5 April 4, 2006 Detailed Description The ICL7667 is a dual high-power CMOS inverter whose inputs respond to TTL levels while the outputs can swing as high as 15V. Its high output current enables it to rapidly charge and discharge the gate capacitance of power MOSFETs, minimizing the switching losses in switchmode power supplies. Since the output stage is CMOS, the output will swing to within millivolts of both ground and VCC without any external parts or extra power supplies as required by the DS0026/56 family. Although most specifications are at VCC = 15V, the propagation delays and specifications are almost independent of VCC. In addition to power MOS drivers, the ICL7667 is well suited for other applications such as bus, control signal, and clock drivers on large memory of microprocessor boards, where the load capacitance is large and low propagation delays are required. Other potential applications include peripheral power drivers and charge-pump voltage inverters. Input Stage The input stage is a large N-Channel FET with a P-channel constant-current source. This circuit has a threshold of about 1.5V, relatively independent of the VCC voltage. This means that the inputs will be directly compatible with TTL over the entire 4.5V - 15V VCC range. Being CMOS, the inputs draw less than 1 µA of current over the entire input voltage range of ground to VCC. The quiescent current or no load supply current of the ICL7667 is affected by the input voltage, going to nearly zero when the inputs are at the 0 logic level and rising to 7mA maximum when both inputs are at the 1 logic level. A small amount of hysteresis, about 50mV to 100mV at the input, is generated by positive feedback around the second stage. Output Stage The ICL7667 output is a high-power CMOS inverter, swinging between ground and VCC. At VCC = 15V, the output impedance of the inverter is typically 7 Ω. The high FIGURE 5. ICC vs FREQUENCY FIGURE 6. NO LOAD ICC vs FREQUENCY FIGURE 7. DELAY AND FALL TIMES vs VCC FIGURE 8. RISE TIME vs VCC Typical Performance Curves (Continued) FREQUENCY (Hz) VCC = 15V VCC = 5V CL = 1nF 100 10 1 100 µA 10K 100K 1M 10M 100 10 1 100mA 10k 100k 1M 10M VCC = 15V VCC = 5V CL = 10pF FREQUENCY (Hz) tf tD1 VCC (V) CL = 1nF 50 40 30 20 10 0 510 15 VCC (V) tr = TD2 CL = 10pF 50 40 30 20 10 0 510 15 ICL7667 |
Similar Part No. - ICL7667_06 |
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Similar Description - ICL7667_06 |
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