Nexperia

HEF4794B

8-stage shift-and-store register LED driver

10. Dynamic characteristics

Table 7. Dynamic characteristics

VSS = 0 V; Tamb = 25 °C unless otherwise specified. For test circuit, see Fig. 10.

Symbol Parameter

Conditions

VDD

Extrapolation formula[1] Min

Typ

Max Unit

5 V

132 ns + (0.55 ns/pF)CL

-

160

320 ns

10 V

53 ns + (0.23 ns/pF)CL

-

65

130 ns

CP to QS1;

see Fig. 6

15 V

37 ns + (0.16 ns/pF)CL

-

45

90

ns

5 V

92 ns + (0.55 ns/pF)CL

-

120

240 ns

10 V

39 ns + (0.23 ns/pF)CL

-

50

100 ns

tPHL

HIGH to LOW

propagation delay

CP to QS2;

see Fig. 6

15 V

32 ns + (0.16 ns/pF)CL

-

40

80

ns

5 V

102 ns + (0.55 ns/pF)CL

-

130

260 ns

10 V

44 ns + (0.23 ns/pF)CL

-

55

110 ns

CP to QS1;

see Fig. 6

15 V

32 ns + (0.16 ns/pF)CL

-

40

80

ns

5 V

102 ns + (0.55 ns/pF)CL

-

130

260 ns

10 V

49 ns + (0.23 ns/pF)CL

-

60

120 ns

tPLH

LOW to HIGH

propagation delay

CP to QS2;

see Fig. 6

15 V

37 ns + (0.16 ns/pF)CL

-

45

90

ns

5 V

-

240

480 ns

10 V

-

80

160 ns

CP to QPn;

see Fig. 6

15 V

-

55

110 ns

5 V

-

140

280 ns

10 V

-

70

140 ns

tPZL

OFF-state to LOW

propagation delay

STR to QPn;

see Fig. 7

15 V

-

55

110 ns

5 V

-

170

340 ns

10 V

-

75

150 ns

CP to QPn;

see Fig. 6

15 V

-

60

120 ns

5 V

-

100

200 ns

10 V

-

40

100 ns

tPLZ

LOW to OFF-state

propagation delay

STR to QPn;

see Fig. 7

15 V

-

35

70

ns

5 V

[2]

-

100

200 ns

10 V

-

55

110 ns

ten

enable time

OE to QPn;

see Fig. 8

15 V

-

50

100 ns

5 V

[2]

-

80

160 ns

10 V

-

40

80

ns

tdis

disable time

OE to QPn;

see Fig. 8

15 V

-

30

60

ns

5 V

[3] 35 ns + (1.00 ns/pF)CL

-

85

170 ns

10 V

19 ns + (0.42 ns/pF)CL

-

40

80

ns

tt

transition time

QS1, QS2;

see Fig. 6

15 V

16 ns + (0.28 ns/pF)CL

-

30

60

ns

5 V

60

30

-

ns

10 V

30

15

-

ns

CP LOW and

HIGH; see Fig. 6

15 V

24

12

-

ns

5 V

80

40

-

ns

10 V

60

30

-

ns

tW

pulse width

STR HIGH;

see Fig. 7

15 V

24

12

-

ns

HEF4794B

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© Nexperia B.V. 2022. All rights reserved

Product data sheet

Rev. 10 — 6 January 2022

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