74163.md

74163: 4-bit synchronous binary counter

• Number of elements: 1
• Inputs per element: 4
• Outputs per element: 4
• Bits: 4
• DIP: 16-pin

Description

TODO

Inputs and outputs

Label	Description	Signal
CE	synchronous clear enable	active low
CLK	clock	positive edge
CEP	count enable parallel input	active high
CET	count enable trickle input	active high
LE	load enable input	active low
Dn	data inputs	active high
Qn	data outputs	active high
TC	terminal count output	active high

Function table

Mode	CE	CLK	CEP	CET	LE	Dn	Qn	TC
Reset	L	/	X	X	X	X	L	L
Parallel load	H	/	X	X	l	l	L	L
Parallel load	H	/	X	X	l	h	H	t
Count	H	/	h	h	h	X	count	t
Hold	H	X	l	X	h	X	qn	L
Hold	H	X	X	l	h	X	qn	L

• H: HIGH voltage level
• L: LOW voltage level
• h: HIGH voltage level one setup time prior to the clock positive edge
• l: LOW voltage level one setup time prior to clock positive edge
• q: state of corresponding output one setup time prior to the clock positive edge
• t: HIGH when CET is HIGH and the counter is at terminal count (HHHH)
• X: Don't care
• /: positive edge

Pin layout

TODO

	Pin	Pin
CE	1	16	VCC
CLK	2	15	TC
D1	3	14	Q1
D2	4	13	Q2
D3	5	12	Q3
D4	6	11	Q4
CEP	7	10	CET
GND	8	9	LE

Datasheets

• CD74HC163 by Texas Instruments
• 74HC163, 74HCT163 by Nexperia