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74ALVT16821DGG

20-bit bus-interface D-type flip-flop; positive-edge trigger (3-State)

Philips Electronics 

Philips Semiconductors

2.5V/3.3V 20-bit bus-interface D-type flip-flop;

positive-edge trigger (3-State)

Product specification

74ALVT16821

AC CHARACTERISTICS (2.5V "0.2V RANGE)

GND = 0V; tR = tF = 2.5ns; CL = 50pF; RL = 500Ω; Tamb = –40°C to +85°C.

SYMBOL

PARAMETER

WAVEFORM

fMAX

Maximum clock frequency

1

tPLH

Propagation delay

tPHL

nCP to nQx

1

tPZH

Output enable time

3

tPZL

to High and Low level

4

tPHZ

Output disable time

3

tPLZ

from High and Low level

4

NOTE:

1. All typical values are at VCC = 3.3V and Tamb = 25°C.

LIMITS

Tamb = -40 to +85oC

VCC = +2.5V ±0.2V

MIN

TYP

MAX

150

1.0

2.6

4.0

1.0

2.7

4.4

1.5

2.8

4.6

1.0

1.8

3.0

1.5

2.7

4.1

1.0

2.1

3.3

UNIT

MHz

ns

ns

ns

AC SETUP REQUIREMENTS (2.5V "0.2V RANGE)

GND = 0V, tR = tF = 2.5ns, CL = 50pF, RL = 500Ω

SYMBOL

PARAMETER

WAVEFORM

ts(H)

ts(L)

Setup time, High or Low

nDx to nCP

2

th(H)

th(L)

Hold time, High or Low

nDx to nCP

2

tw(H)

tw(L)

nCP pulse width

High or Low

1

LIMITS

Tamb = -40 to +85oC

VCC = +2.5 ±0.2V

MIN

TYP

1.5

0.1

2.0

0.5

0.3

–0.5

0.5

–0.1

1.5

1.5

UNIT

ns

ns

ns

AC WAVEFORMS

VM = 1.5V at VCC w 3.0V; VM = VCC/2 at VCC v 2.7V

VX = VOL + 0.3V at VCC w 3.0V; VX = VOL + 0.15V at VCC v 2.7V

VY = VOH – 0.3V at VCC w 3.0V; VY = VOH – 0.15V at VCC v 2.7V

1/fMAX

nCP

VM

tw(H)

tPHL

VM

tw(L)

VM

tPLH

nQx

VM

VM

3.0V or VCC

whichever

is less

0V

VOH

VOL

SH00005

Waveform 1. Propagation Delay, Clock Input to Output,

Clock Pulse Width, and Maximum Clock frequency

nDx

CP

VM VM

ts(H) th(H)

VM

VM VM

ts(L) th(L)

VM

3.0V or VCC

whichever

is less

0V

3.0V or VCC

whichever

is less

0V

SH00006

Waveform 2. Data Setup and Hold Times

1998 Feb 13

8

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