5.11 Switching Characteristics: SN74LVC74A, –40°C to 125°C and –40°C to 85°C

over recommended operating free-air temperature range (unless otherwise noted; see Parameter Measurement Information)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TEST CONDITIONS

MIN

MAX

UNIT

fmax

Maximum clock

frequency

—

—

TA = –40°C to 125°C

VCC = 2.7 V

83

MHz

VCC = 3.3 V ± 0.3 V

100

TA = –40°C to 85°C and VCC = 3.3 V ± 0.3 V

150

tpd

Propagation (delay)

time

CLK

Q or Q

TA = –40°C to 125°C

VCC = 2.7 V

1

6

ns

VCC = 3.3 V ± 0.3 V

5.2

TA = –40°C to 85°C and VCC = 3.3 V ± 0.3 V

1

5.2

PRE or CLR

TA = –40°C to 125°C

VCC = 2.7 V

1

6.4

VCC = 3.3 V ± 0.3 V

5.4

TA = –40°C to 85°C and VCC = 3.3 V ± 0.3 V

1

5.4

tsk(o)

Skew (time), output

—

—

TA = –40°C to 85°C and VCC = 3.3 V ± 0.3 V

1

ns

5.12 Operating Characteristics

TA = 25°C

PARAMETER

TEST CONDITIONS

TYP UNIT

Cpd

Power dissipation capacitance per flip-flop

f = 10 MHz

VCC = 1.8 V

24

pF

VCC = 2.5 V

24

VCC = 3.3 V

26

5.13 Typical Characteristics

2

4

6

8

10

12

14

0

50

100

150

200

250

300

CL – Load Capacitance – pF

VCC = 3 V,

TA = 25°C

One Output Switching

Four Outputs Switching

Eight Outputs Switching

Figure 5-1. Propagation Delay (Low-to-High Transition)

vs Load Capacitance

2

4

6

8

10

0

50

100

150

200

250

300

CL – Load Capacitance – pF

VCC = 3 V,

TA = 25°C

One Output Switching

Four Outputs Switching

Eight Outputs Switching

Figure 5-2. Figure 2. Propagation Delay (High-to-Low

Transition) vs Load Capacitance

SN54LVC74A, SN74LVC74A

SCAS287V – JANUARY 1993 – REVISED MAY 2024

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