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IDT74ALVCH162721PF

3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS AND BUS-HOLD

Integrated Device Technology 

IDT74ALVCH162721

3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS

PIN CONFIGURATION

OE

Q1

Q2

GND

Q3

Q4

VCC

Q5

Q6

Q7

GND

Q8

Q9

Q10

Q11

Q12

Q13

GND

Q14

Q15

Q16

VCC

Q17

Q18

GND

Q19

Q20

NC

1

56

2

55

3

54

4

53

5

52

6

51

7

50

8

49

9

48

10

47

11

46

12

45

13

44

SO56-1

14 SO56-2 43

SO56-3

15

42

16

41

17

40

18

39

19

38

20

37

21

36

22

35

23

34

24

33

25

32

26

31

27

30

28

29

SSOP/

TSSOP/TVSOP

TOP VIEW

CLK

D1

D2

GND

D3

D4

VCC

D5

D6

D7

GND

D8

D9

D10

D11

D12

D13

GND

D14

D15

D16

VCC

D17

D18

GND

D19

D20

CLKEN

PIN DESCRIPTION

Pin Names

OE

Dx

Qx

Description

3–State Output Enable Input (Active LOW)

Data Inputs(1)

3-State Outputs

CLK

Clock Input

CLKEN

Clock Enable Input (Active LOW)

NC

No Internal Connection

NOTE:

1. These pins have “Bus-Hold.” All other pins are standard inputs,

outputs, or I/Os.

EXTENDED COMMERCIAL TEMPERATURE RANGE

ABSOLUTE MAXIMUM RATING (1)

Symbol

VTERM(2)

VTERM(3)

TSTG

Description

Terminal Voltage

with Respect to GND

Terminal Voltage

with Respect to GND

Storage Temperature

Max.

Unit

– 0.5 to + 4.6 V

– 0.5 to

V

VCC + 0.5

– 65 to + 150 °C

IOUT

DC Output Current

– 50 to + 50 mA

IIK

Continuous Clamp Current,

VI < 0 or VI > VCC

IOK

Continuous Clamp Current, VO < 0

± 50

mA

– 50

mA

ICC

Continuous Current through

±100

mA

ISS

each VCC or GND

NOTES:

NEW16link

1. Stresses greater than those listed under ABSOLUTE MAXIMUM

RATINGS may cause permanent damage to the device. This is a

stress rating only and functional operation of the device at these or

any other conditions above those indicated in the operational sections

of this specification is not implied. Exposure to absolute maximum

rating conditions for extended periods may affect reliability.

2. VCC terminals.

3. All terminals except VCC.

CAPACITANCE (TA = +25oC, f = 1.0MHz)

Symbol Parameter(1) Conditions Typ. Max. Unit

CIN

Input Capacitance

VIN = 0V

5

7

pF

COUT

Output

VOUT = 0V

7

9

pF

Capacitance

CI/O

I/O Port

VIN = 0V

7

9

pF

Capacitance

NOTE:

1. As applicable to the device type.

NEW16link

FUNCTION TABLE (each flip-flop)(1)

Inputs

OE

CLKEN

CLK

Output

Dx

Qx

L

H

X

X

Q0

L

L

↑

H

H

L

L

↑

L

L

L

L

L or H

X

Q0

H

X

X

X

Z

NOTE:

1. H = HIGH Voltage Level

L = LOW Voltage Level

X = Don’t Care

Z = High-Impedance

↑ = LOW-to-HIGH Transition

Q0 = Output level before the indicated steady-state input conditions were

established.

2

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