XD7555 DIP8 / XL7555 SOP8 CMOS RC timers

PublishTime：2021-05-19

The XD/XL7555 and 7556 are CMOS RC timers providing significantly improved performance over the standard 555NE and 355 timers, while at the same time being direct replacements for those devices in most applications. Improved parameters include low supply current, wide operating supply voltage range, low Threshold, Trigger and Reset currents, no crowbarring of the supply current during output transitions, higher frequency performance and no requirement to decouple Control Voltage for stable operation.
Specifically, the XD/XL7555 and 7556 are stable controllers capable of producing accurate time delays or frequencies. The 7556 is a dual XD/XL7555, with the two timers operating independently of each other, sharing only V+ and GND. In the one shot mode, the pulse width of each circuit is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled by two external resistors and one capacitor. Unlike the regular bipolar 555NE devices, the Control Voltage terminal need not be decoupled with a capacitor. The circuits are triggered and reset on falling (negative) waveforms, and the output inverter can source or sink currents large enough to drive TTL loads, or provide minimal offsets to drive CMOS loads.
●Features:
■ Exact equivalent in most cases for 555NE or XD555
■ Low supply current:
▲ XD/XL7555: 60μA
▲ 7556: 120μA
■ Extremely low input currents: 20pA
■ High speed operation: 1MHz
■ Guaranteed supply voltage range: 2V to 18V
■ Temperature stability: 0.005%/°C at +25°C
■ Normal reset function - no crowbarring of supply during output transition
■ Can be used with higher impedance timing elements than regular 555/556 for longer RC time constants
■ Timing from microseconds through hours
■ Operates in both astable and monostable modes
■ Adjustable duty cycle
■ High output source/sink driver can drive TTL/CMOS
■ Outputs have very low offsets, HIGH and LOW
■ Pb-free (RoHS Compliant)

Brand of Product：	XINLUDA
Part#：	XD7555 、 XL7555 、 XD555 More Part#
Product Category：	CMOS RC timers More
Application：	[ Precision timing ][ Pulse generation ][ Sequential timing ][ Time delay generation ][ Pulse width modulation ][ Pulse position modulation ][ Missing pulse detector ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	DIP8;SOP8
Language：	English Chinese Chinese and English Japanese
Date of Creation：
Version Number：
Data Encoding：
Data Size：	856 KB

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