Philips Semiconductors Product data sheet
74ALVT16543
2.5 V/3.3 V 16-bit registered transceiver (3-State)
2
2004 Sep 14
FEATURES
• 16-bit universal bus interface
• 5 V I/O Compatible
• 3-State buffers
• Output capability: +64 mA/–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/extraction permitted
• Power-up 3-State
• Power-up reset
• No bus current loading when output is tied to 5 V bus
• Latch-up protection exceeds 500mA per JEDEC Std 17
• ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
DESCRIPTION
The 74ALVT16543 is a high-performance BiCMOS product
designed for V
CC
operation at 2.5 V or 3.3 V with I/O compatibility
up to 5 V. The device can be used as two 8-bit transceivers or one
16-bit transceiver.
The 74ALVT16543 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
CONDITIONS
TYPICAL
T
amb
= 25 °C; GND = 0 V
2.5 V 3.3 V
t
PLH
t
PHL
Propagation delay
nAx to nBx or nBx to nAx
C
L
= 50 pF
1.8
2.7
1.6
1.8
ns
C
IN
Input capacitance DIR, OE V
I
= 0 V or V
CC
3 3 pF
C
I/O
I/O pin capacitance Outputs disabled; V
I/O
= 0 V or V
CC
9 9 pF
I
CCZ
Total supply current Outputs disabled 40 70 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE TYPE NUMBER DWG NUMBER
56-Pin Plastic SSOP Type III –40 °C to +85 °C 74ALVT16543DL SOT371-1
56-Pin Plastic TSSOP Type II –40 °C to +85 °C 74ALVT16543DGG 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
