74F385 datasheet(5/6 Pages) PHILIPS

5 / 6 page

Philips Semiconductors

Product specification

74F385

Quad serial adder/subtractor

1989 Sep 20

AC ELECTRICAL CHARACTERISTICS

LIMITS

Tamb = +25°C

Tamb = 0°C to +70°C

SYMBOL

PARAMETER

TEST

VCC = +5.0V

VCC = +5.0V ± 10%

UNIT

CONDITION

CL = 50pF, RL = 500Ω

MIN

TYP

MAX

MIN

MAX

fMAX

Maximum clock frequency

Waveform 1

105

140

MHz

tPLH

tPHL

Propagation delay,

Cn to Fn

Waveform 1

3.0

3.5

5.0

5.5

8.0

9.0

2.5

3.5

9.0

10.0

tPLH

Propagation delay, MR to Fn

Waveform 2

4.0

6.5

9.5

4.0

10.5

AC SETUP REQUIREMENTS

LIMITS

Tamb = +25°C

Tamb = 0°C to +70°C

SYMBOL

PARAMETER

TEST

VCC = +5.0V

VCC = +5.0V ± 10%

UNIT

CONDITION

CL = 50pF, RL = 500Ω

MIN

TYP

MAX

MIN

MAX

ts (H)

ts (L)

Setup time, High or Low

An, Bn or Sn to CP

Waveform 3

12.0

th (H)

th (L)

Hold time, High or Low

An, Bn or Sn to CP

Waveform 3

ts (H)

ts (L)

CP Pulse width

High or Low

Waveform 2

6.0

tw (L)

MR Pulse width

Low

Waveform 2

6.0

tREC (L)

Recovery time

MR to CP

Waveform 2

8.5

9.5

AC WAVEFORMS

For all waveforms, VM = 1.5V.

The shaded areas indicate when the input is permitted to change for predictable output performances.

tw(H)

1/fmax

tPLH

tw(L)

tPHL

SF00932

Waveform 1. Propagation Delay, Clock Input to Output,

Clock Pulse Width, and Maximum Clock Frequency

tPHL

tREC

SF00933

tW (L)

Waveform 2. Master Reset Pulse Width,

Master Reset to Output Delay and

Master Reset to Clock Recovery Time

ts(L)

th(L)

ts(H)

th(H)

An, Bn, Sn

SF00934

Waveform 3. Data and Select Setup and Hold Times

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