MC14551BF

Switch Time (Ton, Toff) (Max):	--
Base Part Number:	MC14551B
Supplier Device Package:	16-SOEIAJ
Package / Case:	16-SOIC (0.209", 5.30mm Width)
Operating Temperature:	-55°C ~ 125°C (TA)
Crosstalk:	--
Current - Leakage (IS(off)) (Max):	100nA
Channel Capacitance (CS(off), CD(off)):	5pF
Charge Injection:	--
-3db Bandwidth:	17MHz
Series:	--
Voltage - Supply, Dual (V±):	--
Voltage - Supply, Single (V+):	3 V ~ 18 V
Channel-to-Channel Matching (ΔRon):	10 Ohm
On-State Resistance (Max):	280 Ohm
Number of Circuits:	4
Multiplexer/Demultiplexer Circuit:	2:1
Switch Circuit:	SPDT
Part Status:	Obsolete
Packaging:	Tube

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Introduction

MC14551BF is a high performance, low power and low voltage analog switch and demultiplexer. It is an open-collector buffer device with an enable/disable control input. The MC14551BF is supervised by an integrated overvoltage protection circuit and a power-down control input. When the power-down input is enabled the device will cut off its output stage, protecting it from over-voltage. MC14551BF is designed for use in applications that require multiplexing, buffering and/or demultiplexing of analog signals.

Application Field

The MC14551BF is an ideal choice for analog switch, multiplexer and demultiplexer applications. It can be used in many applications such as multi-channel communication systems, low-noise, low-power portable medical systems, industrial control systems and various consumer products such as smart phone, GPS or digital cameras. The MC14551BF is suitable for minimizing the number of pins, while controlling several external signals with a single dedicated control line. The device can also be used in data acquisition systems and test instrumentation, where it can be used to switch, multiplex and demultiplex analog signals in both high voltage and low voltage environments. The MC14551BF is also well-suited for applications such as audio signal routing, transducer and sensor multiplexing and instrumentation designs.

Working Principle

The MC14551BF is a four-channel multiplexer and demultiplexer. It is a dual-in, dual-out device with four channels and two control lines. The device is compatible with TTL, CMOS and PMOS logic, and is equipped with an integrated overvoltage protection circuit. It works in a dynamic mode, in which the four available channels are multiplexed and demultiplexed with every input signal cycle. The MC14551BF also has a power-down control input that allows it to be enabled or disabled by maintaining a logic 0 at the VDD pin. The device can also be enabled or disabled externally by controlling the ENABLE pin. The device is capable of operating at a wide voltage range between 2.7V and 5.5V, and is protected by an integrated overvoltage protection circuit. It is also protected from transient overvoltage with a POR (Power-On Reset) output signal, which is generated for any voltage exceeding the maximum safe limit (about 6.5V). The device performs multiplexing and demultiplexing of analog signals in four channels, with separate control lines for each channel. It also has an enable/disable control input (ENABLE) which provides selectable access to the input channels.

Conclusion

The MC14551BF is an ideal choice for analog switch, multiplexer and demultiplexer applications. It is a four-channel multiplexer and demultiplexer, compatible with TTL, CMOS and PMOS logic, and protected by an integrated overvoltage protection circuit. It is capable of operating at a wide voltage range between 2.7V and 5.5V, and protected from transient overvoltage with a POR (Power-On Reset) output signal. The device can be enabled or disabled externally by controlling the ENABLE pin, and can be used in many applications such as multi-channel communication systems, low-noise, low-power portable medical systems, industrial control systems and various consumer products.

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