Philips Semiconductors Product specification
74LVT16543A3.3V 16-bit registered transceiver (3-State)
2
1998 Feb 19 853–1764 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 µA
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
