Philips 74alvt16821 DATASHEETS

INTEGRATED CIRCUITS

74ALVT16821

20-bit bus-interface D-type flip-flop;
positive-edge trigger (3-State)

Product specification
Supersedes data of 1997 May 01
IC24 Data Handbook

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1998 Feb 13

Philips Semiconductors Product specification

SYMBOL

PARAMETER

UNIT

2.5V/3.3V 20-bit bus-interface D-type flip-flop;
positive-edge trigger (3-State)

FEA TURES

•20-bit positive-edge triggered register

•5V I/O Compatible

•Multiple V

and GND pins minimize switching noise

CC

•Live insertion/extraction permitted

•Power-up reset

•Power-up 3-State

•Output capability: +64mA/-32mA

•Latch-up protection exceeds 500mA per Jedec Std 17

•ESD protection exceeds 2000V per MIL STD 883 Method 3015

and 200V per Machine Model

•Bus hold data inputs eliminate the need for external pull-up

resistors to hold unused inputs

QUICK REFERENCE DATA

C

t

PLH

t

PHL

C

OUT

I

CCZ

IN

Propagation delay
nCP to nQ

Input capacitance VI = 0V or V
Output capacitance VO = 0 or V
Total supply current Outputs disabled 40 70 µA

CL = 50pF

DESCRIPTION

The 74ALVT16821 high-performance BiCMOS device combines
low static and dynamic power dissipation with high speed and high
output drive. It is designed for V
compatibility to 5V .

The 74ALVT16821 has two 10-bit, edge triggered registers, with
each register coupled to a 3-State output buffer. The two sections of
each register are controlled independently by the clock (nCP) and
Output Enable (nOE

Each register is fully edge triggered. The state of each D input, one
set-up time before the Low-to-High clock transition, is transferred to
the corresponding flip-flop’s Q output.

The 3-State output buffers are designed to drive heavily loaded
3-State buses, MOS memories, or MOS microprocessors.

The active Low Output Enable (nOE
independent of the register operation. When nOE
the register appears at the outputs. When nOE
are in high impedance “off” state, which means they will neither drive
nor load the bus.

CONDITIONS

T

CC

CC

amb

= 25°C

CC

) control gates.

74AL VT16821

operation at 2.5V or 3.3V with I/O

) controls all ten 3-State buffers

is Low, the data in

is High, the outputs

TYPICAL

2.5V 3.3V

2.6

2.7
3 3 pF
9 9 pF

1.7

1.8

ns

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER

56-Pin Plastic SSOP Type III –40°C to +85°C 74ALVT16821 DL AV16821 DL SOT371-1
56-Pin Plastic TSSOP Type II –40°C to +85°C 74ALVT16821 DGG AV16821 DGG SOT364-1

1998 Feb 13 853-1869 18962

2

Philips Semiconductors Product specification

2.5V/3.3V 20-bit bus-interface D-type flip-flop;
positive-edge trigger (3-State)

LOGIC SYMBOL

56 54 52 51 49 48 47 45 44 43

1D0 1D1 1D2 1D3 1D4 1D5 1D6 1D7

1CP

56

1OE

1

1Q0 1Q1 1Q2 1Q3 1Q4 1Q5 1Q6 1Q7

2 3 5 6 8 9 10 12 13 14

42 41 40 38 37 36 34 33 31 30

2D0 2D1 2D2 2D3 2D4 2D5 2D6 2D7

29

2CP

28

2OE

2Q0 2Q1 2Q2 2Q3 2Q4 2Q5 2Q6 2Q7

15 16 17 19 20 21 23 24 26 27

LOGIC SYMBOL (IEEE/IEC)

1OE

1CP

2OE

2CP

1D0
1D1
1D2
1D3
1D4
1D5
1D6
1D7
1D8

1D9
2D0
2D1
2D2
2D3
2D4
2D5
2D6
2D7
2D8
2D9

1
56
28
29

55
54
52
51
49
48
47
45
44

43
42
41
40
38
37
36
34
33
31
30

EN2

C1

EN4

C3

1D

3D

2 ∇

4 ∇

1D8 1D9

1Q8 1Q9

2D8 2D9

2Q8 2Q9

SH00002

2
3
5
6
8

9
10
12
13
14
15
16
17
19
20
21
23
24
26
27

SH00003

1Q0
1Q1
1Q2
1Q3
1Q4
1Q5
1Q6
1Q7
1Q8

1Q9
2Q0
2Q1
2Q2
2Q3
2Q4
2Q5
2Q6
2Q7
2Q8
2Q9

PIN CONFIGURATION

1
2

1Q0

3

1Q1

4

GND

5

1Q2

6

1Q3

7

V

CC

8

1Q4

9

1Q5

10

1Q6

11

GND

12

1Q7

13

1Q8

14

1Q9

15

2Q0

16

2Q1

17

2Q2

18

GND

19

2Q3

20

2Q4

21

2Q5

22

V

CC

23

2Q6

24

2Q7

25

GND

26

2Q8

27

2Q9

28 29

2OE

74ALVT16821

561OE

1CP

55

1D0

54

1D1

53

GND

52

1D2

51

1D3

50

V

CC

49

1D4

48

1D5

47

1D6

46

GND

45

1D7

44

1D8

43

1D9

42

2D0

41

2D1

40

2D2

39

GND

38

2D3

37

2D4

36

2D5

35

V

CC

34

2D6

33

2D7

32

GND

31

2D8

30

2D9
2CP

SH00001

1998 Feb 13

3

Philips Semiconductors Product specification

INTERNAL

OPERATING

2.5V/3.3V 20-bit bus-interface D-type flip-flop;
positive-edge trigger (3-State)

PIN DESCRIPTION

PIN NUMBER SYMBOL FUNCTION

56, 54, 52, 51, 49,
48, 47, 45, 44, 43,
42, 41, 40, 38, 37,

36, 34, 33, 31, 30

2, 3, 5, 6, 8, 9, 10,

12, 13, 14,

15, 16, 17, 19, 20,

21, 23, 24, 26, 27

1, 28 1OE, 2OE

56, 29 1CP, 2CP

4, 11, 18, 25, 32,

39, 46, 53

7, 22, 35, 50 V

LOGIC DIAGRAM

1D0 - 1D9
2D0 - 2D9

1Q0 - 1Q9
2Q0 - 2Q9

Data inputs

Data outputs

Output enable inputs
(active-Low)

Clock pulse inputs
(active rising edge)

GND Ground (0V)

CC

Positive supply
voltage

74ALVT16821

FUNCTION TABLE

INPUTS

nOE nCP nDx

L

↑

L

↑

l

h

INTERNAL
REGISTER

L

H

L ↑ X NC NC Hold

H

↑

H

↑XDn

NC

Dn

H = High voltage level
h = High voltage level one set-up time prior to the Low-to-High

clock transition
L = Low voltage level
l = Low voltage level one set-up time prior to the Low-to-High

clock transition
NC= No change
X = Don’t care
Z = High impedance “off” state
↑ = Low to High clock transition

= Not a Low-to-High clock transition

↑

OUTPUTS
nQ0 - nQ9

L

H

Z
Z

OPERATING

MODE

Load and read

register

Disable
outputs

nCP

nOE

nD0

D

CP Q

nQ0

nD1

D

CP Q

nQ1

nD2

D

CP Q

nQ2

nD3

D

CPQ

nQ3

nD4

D

CP Q

nQ4

nD5

D

CPQ

nQ5

nD6

D

CP Q

nQ6

nD7

D

CPQ

nQ7

nD8

D

CPQ

nQ8

nD9

D

CPQ

nQ9

SH00004

1998 Feb 13

4