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74HC(T)163: "Presettable synchronous 4-bit binary counter; synchronous

The 74HC163; 74HCT163 is a synchronous presettable binary counter with an internal look-head carry. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (CP). The outputs (Q0 to Q3) of the counters may be preset to a HIGH or LOW. A LOW at the parallel enable input (PE) disables the counting action. It causes the data at the data inputs (D0 to D3) to be loaded into the counter on the positive-going edge of the clock. Preset takes place regardless of the levels at count enable inputs (CEP and CET). A LOW at the master reset input (MR) sets Q0 to Q3 LOW after the next positive-going transition on the clock input (CP). This action occurs regardless of the levels at input pins PE, CET and CEP. This synchronous reset feature enables the designer to modify the maximum count with only one external NAND gate. The look-ahead carry simplifies serial cascading of the counters. Both CEP and CET must be HIGH to count. The CET input is fed forward to enable the terminal count output (TC). The TC output thus enabled will produce a HIGH output pulse of a duration approximately equal to a HIGH output of Q0. This pulse can be used to enable the next cascaded stage. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

The CP to TC propagation delay and CEP to CP set-up time determine the maximum clock frequency for the cascaded counters according to the following formula:

fmax= (1) / (tP (max)(CP to TC) + tSU(CEP to CP) )

74HC_T_163: Product Block Diagram

Outline 3d SOT338-1

Data Sheets (1)

Application Notes (2)

Users Guides (1)

Selector Guides (2)

Package Information (3)

Packing (1)

Supporting Information (4)

SPICE model

• hc Spice model (REV 1.0) ZIP HC 5/7/2013

Ordering Information

Package Information

Product ID	Package Description	Outline Version	Reflow/Wave Soldering	Packing	Product Status	Part NumberOrdering code(12NC)	Marking	Chemical Content	RoHS / Pb Free / RHF	LeadFree Conversion Date	EFR	IFR(FIT)	MTBF(hour)	MSL	MSL LF
74HCT163D		SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 CECC	Active	74HCT163D,653 (9337 150 20653)	74HCT163D	74HCT163D		week 6, 2004	84.9	6.62	1.51E8	1	1
				Bulk Pack, CECC	Active	74HCT163D,652 (9337 150 20652)	74HCT163D	74HCT163D		week 6, 2004	84.9	6.62	1.51E8	1	1
74HCT163PW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	74HCT163PW,118 (9351 883 40118)	HCT163	74HCT163PW		week 10, 2005	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74HCT163PW,112 (9351 883 40112)	HCT163	74HCT163PW		week 10, 2005	84.9	6.62	1.51E8	1	1
74HCT163DB		SOT338-1	SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	74HCT163DB,118 (9351 873 40118)	HCT163	74HCT163DB		week 12, 2005	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74HCT163DB,112 (9351 873 40112)	HCT163	74HCT163DB		week 12, 2005	84.9	6.62	1.51E8	1	1
74HC163PW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	74HC163PW,118 (9351 873 50118)	HC163	74HC163PW		week 10, 2005	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74HC163PW,112 (9351 873 50112)	HC163	74HC163PW		week 10, 2005	84.9	6.62	1.51E8	1	1
74HC163D		SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 CECC	Active	74HC163D,653 (9337 145 40653)	74HC163D	74HC163D		week 6, 2004	84.9	6.62	1.51E8	1	1
				Bulk Pack, CECC	Active	74HC163D,652 (9337 145 40652)	74HC163D	74HC163D		week 6, 2004	84.9	6.62	1.51E8	1	1
74HC163DB		SOT338-1	SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	74HC163DB,118 (9351 873 30118)	HC163	74HC163DB		week 12, 2005	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74HC163DB,112 (9351 873 30112)	HC163	74HC163DB		week 12, 2005	84.9	6.62	1.51E8	1	1