74LVT16646A
3.3 V 16-bit bus transceiver; 3-state
Rev. 03 — 12 January 2005
Product data sheet
1. General description
The 74LVT16646A is a high-performance BiCMOS product designed for V
CC
operation at
3.3 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) input
for easy cascading and a direction (DIR) input for direction control.
Data on bus A or bus B 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).
2. Features
s
s
s
s
s
s
s
s
s
s
s
s
16-bit universal bus interface
3-state buffers
Output capability: from +64 mA to
−32
mA
TTL input and output switching levels
Input and output interface capability to systems at 5 V supply
Bus-hold data inputs eliminate the need for external pull-up resistors to hold unused
inputs
Live insertion and extraction permitted
No bus-current loading when output is tied to 5 V bus
Power-up reset
Power-up 3-state
Latch-up protection exceeds 500 mA per JESD78
ESD protection:
x
MIL STD 883 Method 3 015: exceeds 2000 V
x
Machine model: exceeds 200 V
Philips Semiconductors
74LVT16646A
3.3 V 16-bit bus transceiver; 3-state
3. Quick reference data
Table 1:
Quick reference data
T
amb
= 25
°
C.
Symbol
t
PLH
, t
PHL
C
I
C
I/O
I
CC
Parameter
propagation delay nAx to nBx or
nBx to nAx
input capacitance
I/O pin capacitance
quiescent supply current
Conditions
C
L
= 50 pF; V
CC
= 3.3 V
V
I
= 0 V or 3.0 V
V
I/O
= 0 V or 3.0 V; outputs disabled
V
CC
= 3.6 V; outputs disabled
Min
-
-
-
-
Typ
1.9
3
9
70
Max Unit
-
-
-
-
ns
pF
pF
µA
4. Ordering information
Table 2:
Ordering information
Package
Temperature range Name
74LVT16646ADGG
−40 °C
to +85
°C
74LVT16646ADL
−40 °C
to +85
°C
Description
Version
TSSOP56 plastic thin shrink small outline package; 56 leads; body SOT364-1
width 6.1 mm
SSOP56
plastic shrink small outline package; 56 leads; body
width 7.5 mm
SOT371-1
Type number
9397 750 14326
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 12 January 2005
2 of 21
Philips Semiconductors
74LVT16646A
3.3 V 16-bit bus transceiver; 3-state
5. Functional diagram
5
6
8
9
10
12
13
14
1A0 1A1 1A2 1A3 1A4 1A5 1A6 1A7
2
3
1
55
54
56
1CPAB
1SAB
1DIR
1CPBA
1SBA
1OE
1B0 1B1 1B2 1B3 1B4 1B5 1B6 1B7
52
51
49
48
47
45
44
43
15
16
18
19
20
22
23
24
2A0 2A1 2A2 2A3 2A4 2A5 2A6 2A7
27
26
28
30
31
29
2CPAB
2SAB
2DIR
2CPBA
2SBA
2OE
2B0 2B1 2B2 2B3 2B4 2B5 2B6 2B7
42
41
40
38
37
36
34
33
001aac208
Fig 1. Logic symbol
56
1
54
3
55
2
G3
3EN1[BA]
3EN2[AB]
G6
G7
C4
C5
1
1
6
4D
52
29
28
31
26
31
27
G10
10EN8[BA]
10EN9[AB]
G13
G14
C11
C12
1
8
13 11D
42
5
15
6 1
1
5D 7
2
7
1
6
8
9
10
12
13
14
51
49
48
47
45
44
43
16
17
19
20
21
23
24
13 1
1
12D 14
9
1 14
41
40
38
37
36
34
33
001aac207
Fig 2. IEC logic symbol
9397 750 14326
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 12 January 2005
3 of 21
Philips Semiconductors
74LVT16646A
3.3 V 16-bit bus transceiver; 3-state
nOE
nDIR
nCPBA
nSBA
nCPAB
nSAB
1 OF 16 CHANNELS
Q
1D
C1
nA0
1D
C1
Q
nB0
nA1
nA2
nA3
nA4
nA5
nA6
nA7
OTHER CHANNELS
nB1
nB2
nB3
nB4
nB5
nB6
nB7
001aac214
Fig 3. Logic diagram
9397 750 14326
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 12 January 2005
4 of 21
Philips Semiconductors
74LVT16646A
3.3 V 16-bit bus transceiver; 3-state
6. Pinning information
6.1 Pinning
1DIR
1CPAB
1SAB
GND
1A0
1A1
V
CC
1A2
1A3
1
2
3
4
5
6
7
8
9
56 1OE
55 1CPBA
54 1SBA
53 GND
52 1B0
51 1B1
50 V
CC
49 1B2
48 1B3
47 1B4
46 GND
45 1B5
44 1B6
43 1B7
42 2B0
41 2B1
40 2B2
39 GND
38 2B3
37 2B4
36 2B5
35 V
CC
34 2B6
33 2B7
32 GND
31 2SBA
30 2CPBA
29 20E
001aac209
1A4 10
GND 11
1A5 12
1A6 13
1A7 14
2A0 15
2A1 16
2A2 17
GND 18
2A3 19
2A4 20
2A5 21
V
CC
22
2A6 23
2A7 24
GND 25
2SAB 26
2CPAB 27
2DIR 28
16646A
Fig 4. Pinning configuration
6.2 Pin description
Table 3:
Symbol
1DIR
1CPAB
1SAB
GND
1A0
1A1
V
CC
1A2
9397 750 14326
Pin description
Pin
1
2
3
4
5
6
7
8
Description
direction control inputs 0 to 7
clock inputs 0 to 7; A to B side
select inputs 0 to 7; A to B side
ground (0V)
data input or output 0; A side
data input or output 1; A side
positive supply voltage
data input or output 2; A side
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 12 January 2005
5 of 21
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