Philips
Semiconductors
74LVT16543A
3.3V LVT 16-bit registered transceiver
(3-State)
Product specification
Supersedes data of 19
IC23 Data Handbook
1998 Feb 19
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74LVT16543A
3.3V 16-bit registered transceiver (3-State)
2
1998 Feb 19
8531764 18986
FEATURES
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
Power-up 3-State
Power-up reset
No bus current loading when output is tied to 5V bus
Latch-up protection exceeds 500mA per JEDEC Std 17
ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
DESCRIPTION
The 74LVT16543A is a high-performance BiCMOS product
designed for V
CC
operation at 3.3V. The device can be used as two
8-bit transceivers or one 16-bit transceiver.
The 74LVT16543A contains two sets of eight D-type latches, with
separate control pins for each set. Using data flow from A to B as an
example, when the A-to-B Enable (nEAB) input and the A-to-B Latch
Enable (nLEAB) input are Low, the A-to-B path is transparent.
A subsequent Low-to-High transition of the nLEAB signal puts the A
data into the latches where it is stored and the B outputs no longer
change with the A inputs. With nEAB and nOEAB both Low, the
3-State B output buffers are active and display the data present at
the outputs of the A latches.
Control of data flow from B to A is similar, but using the nEBA,
nLEBA, and nOEBA inputs.
Active bus-hold circuitry is provided to hold unused or floating data
inputs at a valid logic level.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
T
amb
= 25
C; GND = 0V
TYPICAL
UNIT
t
PLH
t
PHL
Propagation delay
nAx to nBx or nBx to nAx
C
L
= 50pF;
V
CC
= 3.3V
2.2
ns
C
IN
Input capacitance control pins
V
I
= 0V or 3.0V
3
pF
C
I/O
I/O pin capacitance
Outputs disabled; V
I/O
= 0V or 3.0V
9
pF
I
CCZ
Total supply current
Outputs disabled; V
CC
= 3.6V
70
A
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
DWG NUMBER
56-Pin Plastic SSOP Type III
40
C to +85
C
74LVT16543A DL
VT16543A DL
SOT371-1
56-Pin Plastic TSSOP Type II
40
C to +85
C
74LVT16543A DGG
VT16543A DGG
SOT364-1
LOGIC SYMBOL (IEEE/IEC)
9
11 D
5 D
56
54
55
1
3
2
5
29
26
27
28
31
30
6
8
9
10
12
13
14
52
51
49
48
47
45
44
15
16
17
19
20
21
23
43
24
42
41
40
38
37
36
34
33
3
1EN3 (BA)
G1
1C5
2EN4 (AB)
G2
2C6
6 D
4
7EN9 (BA)
G7
7C11
8EN10 (AB)
G8
8C12
12 D
10
SW00151
Philips Semiconductors
Product specification
74LVT16543A
3.3V 16-bit registered transceiver (3-State)
1998 Feb 19
3
PIN CONFIGURATION
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
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
27
28
30
29
1OEAB
1LEAB
1EAB
GND
1A0
1A1
1A2
1A3
1A4
GND
1A5
1A6
1A7
2A0
2A2
GND
2A3
VCC
2A1
2A4
2A5
2A6
2A7
2EAB
VCC
GND
2LEAB
2OEAB
1OEBA
1LEBA
1EBA
GND
1B0
1B1
1B2
1B3
1B4
GND
1B5
1B6
1B7
2B0
2B2
GND
2B3
VCC
2B1
2B4
2B5
2B6
2B7
2EBA
VCC
GND
2LEBA
2OEBA
SH00037
LOGIC SYMBOL
3
54
1EAB
1EBA
2
1LEAB
55
1LEBA
1
1OEAB
56
1OEBA
26
31
2EAB
2EBA
27
2LEAB
30
2LEBA
28
2OEAB
29
2OEBA
5
6
10
12
13
14
8
9
52
51
47
45
44
43
49
48
15
16
20
21
23
24
17
19
42
41
37
36
34
33
40
38
SH00038
1A0 1A1 1A2 1A3 1A4 1A5 1A6 1A7
1B0 1B1 1B2 1B3 1B4 1B5 1B6 1B7
2A0 2A1 2A2 2A3 2A4 2A5 2A6 2A7
2B0 2B1 2B2 2B3 2B4 2B5 2B6 2B7
PIN DESCRIPTION
PIN NUMBER
SYMBOL
NAME AND FUNCTION
5, 6, 8, 9, 10, 12, 13, 14
15, 16, 17, 19, 20, 21, 23, 24
1A0 1A7,
2A0 2A7
A Data inputs/outputs
52, 51, 49, 48, 47, 45, 44, 43
42, 41, 40,38, 37, 36, 34, 33
1B0 1B7,
2B0 2B7
B Data inputs/outputs
1, 56
28, 29
1OEAB, 1OEBA,
2OEAB, 2OEBA
A to B / B to A Output Enable inputs (active-Low)
3, 54
26, 31
1EAB, 1EBA,
2EAB, 2EBA
A to B / B to A Enable inputs (active-Low)
2, 55
27, 30
1LEAB, 1LEBA,
2LEAB, 2LEBA
A to B / B to A Latch Enable inputs (active-Low)
4, 11, 18, 25, 32, 39, 46, 53
GND
Ground (0V)
7, 22, 35, 50
V
CC
Positive supply voltage
Philips Semiconductors
Product specification
74LVT16543A
3.3V 16-bit registered transceiver (3-State)
1998 Feb 19
4
LOGIC DIAGRAM
D
LE
Q
D
LE
Q
DETAIL A
nB0
nB1
nA1
nB2
nA2
nB3
nA3
nB4
nA4
nB5
nA5
nB6
nA6
nB7
nA7
DETAIL A X 7
nOEAB
nEAB
nLEAB
nOEBA
nEBA
nLEBA
nA0
SH00039
FUNCTION TABLE
INPUTS
OUTPUTS
STATUS
nOEXX
nEXX
nLEXX
nAx or nBx
nBx or nAx
STATUS
H
X
X
X
Z
Disabled
X
H
X
X
Z
Disabled
L
L
L
L
h
l
Z
Z
Disabled + Latch
L
L
L
L
h
l
H
L
Latch + Display
L
L
L
L
L
L
H
L
H
L
Transparent
L
L
H
X
NC
Hold
H = High voltage level
h
= High voltage level one set-up time prior to the Low-to-High transition of nLEXX or nEXX (XX = AB or BA)
L
= Low voltage level
l
= Low voltage level one set-up time prior to the Low-to-High transition of nLEXX or nEXX (XX = AB or BA)
X = Don't care
= Low-to-High transition of nLEXX or nEXX (XX = AB or BA)
NC= No change
Z = High impedance or "off " state
Philips Semiconductors
Product specification
74LVT16543A
3.3V 16-bit registered transceiver (3-State)
1998 Feb 19
5
ABSOLUTE MAXIMUM RATINGS
1, 2
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
V
CC
DC supply voltage
0.5 to +4.6
V
I
IK
DC input diode current
V
I
< 0
50
mA
V
I
DC input voltage
3
0.5 to +7.0
V
I
OK
DC output diode current
V
O
< 0
50
mA
V
OUT
DC output voltage
3
Output in Off or High state
0.5 to +7.0
V
I
O
DC output current
Output in Low state
128
mA
I
OUT
DC output current
Output in High state
64
mA
T
stg
Storage temperature range
65 to +150
C
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150
C.
3. The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN
MAX
UNIT
V
CC
DC supply voltage
2.7
3.6
V
V
I
Input voltage
0
5.5
V
V
IH
High-level input voltage
2.0
V
V
IL
Input voltage
0.8
V
I
OH
High-level output current
32
mA
I
O
Low-level output current
32
mA
I
OL
Low-level output current; current duty cycle
50%; f
1kHz
64
mA
t/
v
Input transition rise or fall rate; Outputs enabled
10
ns/V
T
amb
Operating free-air temperature range
40
+85
C
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