74LVC169 datasheet(9/14 Pages) PHILIPS

Nome de Peças	74LVC169

Descrição Electrónicos	Presettable synchronous 4-bit up/down binary counter

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Philips Semiconductors

Product specification

74LVC169

Presettable synchronous 4-bit up/down

binary counter

1998 May 20

9

AC WAVEFORMS

VM = 1.5 V at VCC w 2.7 V

VM = 0.5 S VCC at VCC < 2.7 V

VOL and VOH are the typical output voltage drop that occur with the output load.

VM

1/fMAX

tw

tPLH

tPHL

CP INPUT

Qn, TC OUTPUT

SY00071

GND

VI

VOH

VOL

Waveform 1.

Clock (CP) to outputs (Qn, TC) propagation

delays, the clock pulse width and the maximum clock

frequency.

VM

tPLH

tPHL

CET

TC

SF00792

Waveform 2.

Input (CET) to output (TC) propagation delays

and output transition times.

VM

tPLH

tPHL

VM

U/D

TC

SF00793

Waveform 3.

Master reset (MR) pulse width, the master reset

to output (Qn, TC) propagation delays and the master reset to

clock (CP) removal times.

The shaded areas indicate when the input is permitted

to change for predictable output performance.

th

VM

VI

GND

PE INPUT

CP INPUT

Dn INPUT

tSU

th

tSU

th

tSU

SC00137

Waveform 4.

Setup and hold times for the input (Dn) and

parallel enable input (PE).

NOTE: The shaded areas indicate when the input is permitted

to change for predictable output performance.

VM

tsu

th

tsu

th

SC00138

VI

GND

CEP, CET

INPUT

CP INPUT

Waveform 5.

CEP and CET setup and hold times.

TEST CIRCUIT

SWITCH POSITION

PULSE

GENERATOR

RT

VI

D.U.T.

VO

CL

VCC

500

Ω

Open

GND

S1

VCC

VI

< 2.7V

VCC

TEST

S1

tPLH/tPHL

Open

2.7V

2.7–3.6V

50pF

500

Ω

2 * VCC

SV00903

Waveform 6.

Load circuitry for switching times.

Nº de peça semelhante - 74LVC169

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NXP Semiconductors	74LVC169	138Kb / 22P	Presettable synchronous 4-bit up/down binary counter Rev. 05-8 June 2009
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Descrição semelhante - 74LVC169

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More results

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