SN54HC266, SN74HC266

QUADRUPLE 2-INPUT EXCLUSIVE-NOR GATES

WITH OPEN-DRAIN OUTPUTS

SCLS135C – DECEMBER 1982 – REVISED MAY 1997

3

POST OFFICE BOX 655303

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HC266

SN74HC266

UNIT

PARAMETER

(INPUT)

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

60

125

190

155

tPLH

A or B

Y

4.5 V

13

25

38

31

ns

6 V

10

23

32

26

2 V

60

100

150

125

tPHL

A or B

Y

4.5 V

13

20

30

25

ns

6 V

10

17

25

21

2 V

28

75

110

95

tt

Y

4.5 V

8

15

22

19

ns

6 V

6

13

19

16

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance per gate

No load

35

pF

PARAMETER MEASUREMENT INFORMATION

VOLTAGE WAVEFORMS

PROPAGATION DELAY AND OUTPUT TRANSITION TIMES

50%

50%

10%

10%

90%

VCC

VOH

VOL

0 V

tf

Input

In-Phase

Output

50%

tPLH

tPHL

50%

10%

10%

90%

VOH

VOL

tf

tPHL

tPLH

Out-of-Phase

Output

LOAD CIRCUIT

Test

Point

From Output

Under Test

CL = 50 pF

(see Note A)

VCC

RL = 1 kΩ

NOTES: A. CL includes probe and test-fixture capacitance.

B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following

characteristics: PRR

≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.

C. The outputs are measured one at a time with one input transition per measurement.

VOLTAGE WAVEFORM

INPUT RISE AND FALL TIMES

50%

50%

10%

10%

90%

90%

VCC

0 V

tr

tf

Input

Figure 1. Load Circuit and Voltage Waveforms

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