CD4009 CMOS Hex inverting Buffer/Converter IC

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CD4009 Hex Inverter/Buffer is a part of the CD4000 IC series. It is also characterized for usage as a buffer for driving TTL inputs. The CD4009UB and CD4010B types are supplied in 16-lead hermetic dual-in-line ceramic packages. They offer many different features such as ESD protection & thermal overload protection.

What is a Hex Buffer?

A Hex buffer is a basic logic gate that passes its input, unchanged, to its output. Its behavior is the opposite of a NOT gate. The main purpose of a buffer is to regenerate the input, usually using a strong high and a strong low. A buffer has one input and one output; its output is always equal to its input. Buffers are also used to increase the propagation delay of circuits by driving the large capacitive loads.

CD4009 Pinout

Pin No	Pin Name	Description
1	Vcc	Input Supply
2	G = A’	Buffer Operation G = A’
3	A	Input pin A
4	H = B’	Buffer Operation H = B’
5	B	Input Pin B
6	I = C’	Buffer Operation I = C’
7	C	Input Pin C
8	Vss	Ground Pin
9	D	Input Pin D
10	J = D’	Buffer Operation J = D’
11	E	Input Pin E
12	K = E’	Buffer Operation K = E’
13	NC	Not used
14	F	Input Pin F
15	L = F’	Buffer Operation L = F’
16	VDD	Chip Supply Voltage