Philips 74lvt16646a DATASHEETS

INTEGRATED CIRCUITS

74LVT16646A

3.3V ABT 16-bit bus transceiver (3-State)

Product specification
Supersedes data of 1994 Jul 25
IC23 Data Handbook

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1998 Feb 19

Philips Semiconductors Product specification

74L VT16646A3.3V 16-bit bus transceiver (3-State)

FEA TURES

•16-bit universal bus interface

•3-State buffers

•Output capability: +64mA/-32mA

•TTL input and output switching levels

•Input and output interface capability to systems at 5V supply

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

resistors to hold unused inputs

•Live insertion/extraction permitted

•No bus current loading when output is tied to 5V bus

•Power-up reset

•Power-up 3-State

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

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

and 200V per Machine Model

QUICK REFERENCE DATA

SYMBOL PARAMETER

t

PLH

t

PHL

C
C
I

CCZ

IN

I/O

Propagation delay
nAx to nBx or nBx to nAx

Input capacitance VI = 0V or 3.0V 3 pF
I/O pin capacitance Outputs disabled; V
Total supply current Outputs disabled; VCC = 3.6V 70 µA

CL = 50pF;
VCC = 3.3V

DESCRIPTION

The 74LVT16646A is a high-performance BiCMOS product
designed for V
This device is a 16-bit transceiver featuring non-inverting 3-State
bus compatible outputs in both send and receive directions. The
control function implementation minimizes external timing
requirements. The device features an Output Enable (OE
easy cascading and a Direction (DIR) input for direction control.

Data on the A or B bus is clocked into the registers on the Low to
High transition of the appropriate clock (CPAB or CPBA). The
select-control (SAB and SBA) inputs can multiplex stored and
real-time (transparent mode data).

CONDITIONS

T

amb

operation at 3.3V .

CC

= 25°C

TYPICAL UNIT

1.9 ns

= 0V or 3.0V 9 pF

I/O

) input for

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER

56-Pin Plastic SSOP Type III –40°C to +85°C 74LVT166646A DL VT16646A DL SOT371-1
56-Pin Plastic TSSOP Type II –40°C to +85°C 74LVT16646A DGG VT16646A DGG SOT364-1

LOGIC SYMBOL (IEEE/IEC)

56

1

54

3

55

2

5

6

8

9

10

12
13

14

G3
3EN1 [BA]
3EN2 [AB]
G6
G7
C4
C5

≥1

∇1

5D 7
17

64D

1

6

≥1

2∇

29

28
31
26
31
27

52

15

51

16

49

17

48

19

47

20

45

21

44

23

43

24

G10
10EN8 [BA]
10EN9 [AB]
G13
G14

C11

C12

≥1
∇8

12D 14

114

13 11D

1

13

≥1

9∇

42

41

40
38

37

36
34

33

SW00157

1998 Feb 19 853-1760 18986

2

Philips Semiconductors Product specification

74LVT16646A3.3V 16-bit bus transceiver (3-State)

PIN CONFIGURATION

1

1DIR

2

1CPAB

1SAB

3

GND

4

1A0

5

1A1

6
7

V

CC

8

1A2
1A3

9

1A4

10

GND

11

1A5

12

1A6

13

1A7

14

2A0

15
16

2A1
2A2

17

GND

18

2A3

19
20

2A4

21

2A5

22

V

CC

23

2A6

24

2A7

GND

25
26

2SAB

27

2CPAB

28

2DIR

SH00026

LOGIC SYMBOL

56

1OE

55

1CPBA
1SBA

54

GND

53

1B0

52

1B1

51
50

V

CC

49

1B2
1B3

48

1B4

47

GND

46

1B5

45

1B6

44

1B7

43

2B0

42
41

2B1
2B2

40

GND

39

2B3

38
37

2B4

36

2B5

35

V

CC

34

2B6

33

2B7
GND

32
31

2SBA

30

2CPBA

29

20E

2
3

1 1DIR
55 1CPBA
54 1SBA
56 1OE

27
26
28 2DIR
30 2CPBA
31 2SBA
29 2OE

5 9 10 12 13 1468

1A0 1A1 1A2 1A3 1A4 1A5 1A6 1A7
1CPAB

1SAB

1B0 1B1 1B2 1B3 1B4 1B5 1B6 1B7

52 51 49 48 47 45 44 43

15 16 17 19 20 21 23 24

2A0 2A1 2A2 2A3 2A4 2A5 2A6 2A7
2CPAB

2SAB

2B0 2B1 2B2 2B3 2B4 2B5 2B6 2B7

42 41 40 38 37 36 34 33

SH00027

PIN DESCRIPTION

PIN NUMBER SYMBOL NAME AND FUNCTION

2, 55, 27, 30 1CPAB, 1CPBA, 2CPAB, 2CPBA Clock input A to B / Clock input B to A
3, 54, 26, 31 1SAB, 1SBA, 2SAB, 2SBA Select input A to B / Select input B to A

1, 28 1DIR, 2DIR Direction control inputs

5, 6, 8, 9, 10, 12, 13, 14

15, 16, 17, 19, 20, 21, 23, 24
52, 51, 49, 48, 47, 45, 44, 43

42, 41, 40, 38, 37, 36, 34, 33

56, 29 1OE, 2OE Output enable inputs

4, 11, 18, 25, 32, 39, 46, 53 GND Ground (0V)

7, 22, 35, 50 V

1998 Feb 19

1A0 - 1A7,

2A0 - 2A7

1B0 - 1B7,

2B0 - 2B7

CC

3

Data inputs/outputs (A side)

Data inputs/outputs (B side)

Positive supply voltage

Philips Semiconductors Product specification

74LVT16646A3.3V 16-bit bus transceiver (3-State)

The following examples demonstrate the four fundamental
bus-management functions that can be performed with the
74LVT16646A.

REAL TIME BUS TRANSFER

BUS B TO BUS A

ABAB AB

REAL TIME BUS TRANSFER

BUS A TO BUS B

STORAGE FROM

A, B, OR A AND B

}

nOE nDIR nCPAB nCPBA nSAB nSBA

LLXXXL

}

nOE nDIR nCPAB nCPBA nSAB nSBA

LH X X LX

TRANSFER STORED DA TA

TO A OR B

AB

}

nOE nDIR nCPAB nCPBA nSAB nSBA

LH ↑ XXX
LL X ↑ XX
HX ↑↑XX

1998 Feb 19

}

nOE nDIR nCPAB nCPBA nSAB nSBA

L L X H | L X H
L H H | L X H X

SH00028

4