Datasheet > 74LVC163BQ

74LVC163BQ

更新时间： 2024-09-15 11:13:07

品牌	Logo	应用领域
安世 - NEXPERIA		/
页数	文件大小	规格书
18页	290K
描述
Presettable synchronous 4-bit binary counter; synchronous resetProduction

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74LVC163BQ 数据手册

74LVC163

Presettable synchronous 4-bit binary counter; synchronous

reset

Rev. 7 — 19 April 2021

Product data sheet

1. General description

The 74LVC163 is a synchronous presettable binary counter which features an internal look-ahead

carry and can be used for high-speed counting. Synchronous operation is provided by having all

flip-flops clocked simultaneously on the positive-going edge of the clock (pin CP). The outputs (pins

Q0 to Q3) of the counters may be preset to a HIGH-level or LOW-level. A LOW-level at the parallel

enable input (pin PE) disables the counting action and causes the data at the data inputs (pins

D0 to D3) to be loaded into the counter on the positive-going edge of the clock (provided that the

set-up and hold time requirements for PE are met). Preset takes place regardless of the levels at

count enable inputs (pin CEP and CET). A LOW-level at the master reset input (pin MR) sets all

four outputs of the flip-flops (pins Q0 to Q3) to LOW-level after the next positive-going transition

on the clock input (pin CP) (provided that the set-up and hold time requirements for PE are met).

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 count enable inputs (pin

CEP and CET) must be HIGH in count. The CET input is fed forward to enable the terminal count

output (pin TC). The TC output thus enabled will produce a HIGH output pulse of a duration

approximately equal to a HIGH-level output of Q0. This pulse can be used to enable the next

cascaded stage.

The maximum clock frequency for the cascaded counters is determined by t_PHL(propagation delay

CP to TC) and t_su(set-up time CEP to CP) according to the formula:

2. Features and benefits

•

Wide supply voltage range from 1.2 V to 3.6 V

•

Inputs accept voltages up to 5.5 V

CMOS low power consumption

Direct interface with TTL levels

Synchronous reset

Synchronous counting and loading

Two count enable inputs for n-bit cascading

Positive edge-triggered clock

Complies with JEDEC standard:

•

JESD8-7A (1.65 V to 1.95 V)

JESD8-5A (2.3 V to 2.7 V)

JESD8-C/JESD36 (2.7 V to 3.6 V)

•

ESD protection:

•

HBM JESD22-A114F exceeds 2000 V

MM JESD22-A115-B exceeds 200 V

CDM JESD22-C101E exceeds 1000 V

Specified from -40 °C to +85 °C and -40 °C to 125 °C

12 3 4 5 6 7...18

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与74LVC163BQ相关器件

型号	品牌	获取价格	描述	数据表
74LVC163D	NXP	获取价格	Presettable synchronous 4-bit binary counter; synchronous reset
74LVC163D	NEXPERIA	获取价格	Presettable synchronous 4-bit binary counter; synchronous resetProduction
74LVC163D,112	NXP	获取价格	74LVC163 - Presettable synchronous 4-bit binary counter; synchronous reset SOP 16-Pin
74LVC163D,118	NXP	获取价格	74LVC163 - Presettable synchronous 4-bit binary counter; synchronous reset SOP 16-Pin
74LVC163DB	NXP	获取价格	Presettable synchronous 4-bit binary counter; synchronous reset
74LVC163DB,112	NXP	获取价格	74LVC163 - Presettable synchronous 4-bit binary counter; synchronous reset SSOP1 16-Pin
74LVC163DB,118	NXP	获取价格	74LVC163 - Presettable synchronous 4-bit binary counter; synchronous reset SSOP1 16-Pin
74LVC163DB-T	ETC	获取价格	Synchronous Up Counter
74LVC163D-T	ETC	获取价格	Synchronous Up Counter
74LVC163PW	NXP	获取价格	Presettable synchronous 4-bit binary counter; synchronous reset

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