CD4093BM96

Current - Output High, Low:	3.4mA, 3.4mA
Base Part Number:	4093
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Max Propagation Delay @ V, Max CL:	130ns @ 15V, 50pF
Logic Level - High:	3.6 V ~ 10.8 V
Logic Level - Low:	0.9 V ~ 4 V
Series:	4000B
Current - Quiescent (Max):	4µA
Voltage - Supply:	3 V ~ 18 V
Features:	--
Number of Inputs:	2
Number of Circuits:	4
Logic Type:	NAND Gate
Part Status:	Active
Packaging:	Tape & Reel (TR)

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CD4093BM96 is a set of four independent, 2-input NAND Schmitt Trigger Gates, each of which accepts standard TTL input levels and provide true complementary outputs. These devices feature very tight timing specifications which are independent of voltage, temperature and processing. They are used extensively in circuits requiring very sharp transitions and good noise immunity (e.g. computers, keyboards, timers and PLL’s).

Application Field

CD4093BM96 is mainly applied in low power applications including logic buffers, timing circuits, memory elements and logic gate applications. Since it is a two input NAND Schmitt Trigger, it can produce a predictable slow change in output when connected to an external capacitor and driven by a slow changing input voltage. This gate may also be used as a bistable multivibrator, where the state of the device will remain the same until the other input changes. This feature is particularly useful in PLL applications such as voltage controlled oscillators (VCOs) making it an ideal choice for applications needing reliable high performance output.

Working Principle

The CD4093BM96 gates operate in the same way as any two input NAND gate: if both inputs are high, then the output will be low. However, due to the Schmitt trigger circuitry contained in this device, the input has a hysteresis (voltage different between logic 1 and 0) of about 0.4V. This hysteresis makes the gate immune to noise that often plagues conventional NAND gates. The output of the CD4093BM96 will remain at its most recent stable state until an input changes: an input change of more than 0.4V will cause the output to change. This level of hysteresis considerably reduces the noise pickup as compared to a normal NAND gate.Another feature of this device is that the output will go high if both the input and the output are low: in other words, the output acts as an open collector output. This is useful in ensuring that the output voltage will not exceed the power supply voltage, which can be important in some applications such as when controlling the output current of an LED (Light Emitting Diode).

Conclusion

In conclusion, the CD4093BM96 is a versatile, low power two input NAND Schmitt Trigger Gate with excellent noise immunity and sharp, predictable transitions. It can be used in countless applications in PLLs, memories, and logic gate systems. Its tight timing specifications and open collector output make it a unique and cost effective choice for modern design challenges.

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