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