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74HC5555D-T 数据表(PDF) 2 Page - NXP Semiconductors |
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74HC5555D-T 数据表(HTML) 2 Page - NXP Semiconductors |
2 / 23 page September 1993 2 Philips Semiconductors Product specification Programmable delay timer with oscillator 74HC/HCT5555 FEATURES • Positive and negative edge triggered • Retriggerable or non-retriggerable • Programmable delay minimum: 100 ns maximum: depends on input frequency and division ratio • Divide-by range of 2 to 224 • Direct reset terminates output pulse • Very low power consumption in triggered start mode • 3 oscillator operating modes: – RC oscillator – Crystal oscillator – External oscillator • Device is unaffected by variations in temperature and VCC when using an external oscillator • Automatic power-ON reset • Schmitt trigger action on both trigger inputs • Direct drive for a power transistor • Low power consumption in active mode with respect to TTL type timers • High precision due to digital timing • Output capability: 20 mA • ICC category: MSI. APPLICATIONS • Motor control • Attic fan timers • Delay circuits • Automotive applications • Precision timing • Domestic appliances. GENERAL DESCRIPTION The 74HC/HCT5555 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT5555 are precision programmable delay timers which consist of: • 24-stage binary counter • integrated oscillator (using external timing components) • retriggerable/non-retriggerable monostable • automatic power-ON reset • output control logic • oscillator control logic • overriding asynchronous master reset (MR). QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns. Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW): PD = CPD x VCC2 x fi + Σ(CL x VCC2 x fo) where: fi = input frequency in MHz fo = output frequency in MHz Σ(CL x VCC2 x fo) = sum of outputs. CL = output load capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC − 1.5 V. ORDERING INFORMATION SYMBOL PARAMETER CONDITIONS TYP. UNIT tPHL/tPLH propagation delay CL = 15 pF; VCC = 5 V A, B to Q/Q24 24 ns MR to Q/Q19 20 ns RS to Q/Q26 28 ns CI input capacitance 3.5 3.5 pF CPD power dissipation capacitance per buffer notes 1 and 2 23 36 pF EXTENDED TYPE NUMBER PACKAGE PINS PIN POSITION MATERIAL CODE 74HC/HCT5555N 16 DIL plastic SOT38Z 74HC/HCT5555D 16 SO16 plastic SOT109A |
类似零件编号 - 74HC5555D-T |
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类似说明 - 74HC5555D-T |
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