74ALVT16501
18-bit universal bus transceiver; 3-state
Rev. 04 — 8 August 2005
Product data sheet
1. General description
The 74ALVT16501 is a high-performance Bipolar Complementary Metal Oxide
Semiconductor (BiCMOS) product designed for V
CC
operation at 2.5 V and 3.3 V with
I/O compatibility up to 5 V. This device is an 18-bit universal transceiver featuring
non-inverting 3-state bus compatible outputs in both send and receive directions.
Data flow in each direction is controlled by output enable (OEAB and OEBA), latch enable
(LEAB and LEBA), and clock (CPAB and CPBA) inputs.
For A-to-B data flow, the device operates in the transparent mode when LEAB is HIGH.
When LEAB is LOW, the A-bus data is latched if CPAB is held at a HIGH or LOW level.
If LEAB is LOW, the A-bus data is stored in the latch/flip-flop on the LOW-to-HIGH
transition of CPAB. When OEAB is HIGH, the outputs are active. When OEAB is LOW, the
outputs are in the high-impedance state.
Active bus hold circuitry is provided to hold unused or floating data inputs at a valid logic
level.
Data flow for B-to-A is similar to that of A-to-B but uses OEBA, LEBA and CPBA. The
output enables are complimentary (OEAB is active HIGH and OEBA is active LOW).
2. Features
s
s
s
s
s
s
s
s
s
s
s
s
s
18-bit bidirectional bus interface
5 V I/O compatible
3-state buffers
Output capability: +64 mA to
−32
mA
TTL and LVTTL input and output switching levels
Bus hold data inputs eliminate the need for external pull-up resistors to hold unused
inputs
Live insertion and extraction permitted
Power-up reset
Power-up 3-state
No bus current loading when output is tied to 5 V bus
Positive-edge triggered clock inputs
Latch-up protection:
x
JESD78: exceeds 500 mA
ESD protection:
x
MIL STD 883, method 3015: exceeds 2000 V
x
Machine model: exceeds 400 V
Philips Semiconductors
74ALVT16501
18-bit universal bus transceiver; 3-state
3. Quick reference data
Table 1:
Quick reference data
GND = 0 V; T
amb
= 25
°
C.
Symbol Parameter
V
CC
= 2.5 V
t
PLH
t
PHL
C
i
C
io
I
CC
t
PLH
t
PHL
C
i
C
io
I
CC
propagation delay An to Bn or
Bn to An
propagation delay An to Bn or
Bn to An
input/output capacitance of
I/O pins
quiescent supply current
propagation delay An to Bn or
Bn to An
propagation delay An to Bn or
Bn to An
input/output capacitance of
I/O pins
quiescent supply current
C
L
= 30 pF
C
L
= 30 pF
-
-
-
-
-
-
-
-
-
-
2.0
2.1
4
8
40
1.8
1.9
4
8
60
-
-
-
-
-
-
-
-
-
-
ns
ns
pF
pF
µA
ns
ns
pF
pF
µA
Conditions
Min
Typ
Max
Unit
input capacitance of control pins V
I
= 0 V or V
CC
V
I/O
= 0 V or V
CC
outputs disabled
C
L
= 50 pF
C
L
= 50 pF
V
CC
= 3.3 V
input capacitance of control pins V
I
= 0 V or V
CC
V
I/O
= 0 V or V
CC
outputs disabled
4. Ordering information
Table 2:
Ordering information
Package
Temperature range Name
74ALVT16501DL
−40 °C
to +85
°C
SSOP56
TSSOP56
Description
plastic shrink small outline package; 56 leads;
body width 7.5 mm
plastic thin shrink small outline package; 56 leads;
body width 6.1 mm
Version
SOT371-1
SOT364-1
Type number
74ALVT16501DGG
−40 °C
to +85
°C
74ALVT16501_4
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 04 — 8 August 2005
2 of 20
Philips Semiconductors
74ALVT16501
18-bit universal bus transceiver; 3-state
6. Pinning information
6.1 Pinning
OEAB
LEAB
A0
GND
A1
A2
V
CC
A3
A4
1
2
3
4
5
6
7
8
9
56 GND
55 CPAB
54 B0
53 GND
52 B1
51 B2
50 V
CC
49 B3
48 B4
47 B5
46 GND
45 B6
44 B7
43 B8
42 B9
41 B10
40 B11
39 GND
38 B12
37 B13
36 B14
35 V
CC
34 B15
33 B16
32 GND
31 B17
30 CPBA
29 GND
001aad337
A5 10
GND 11
A6 12
A7 13
A8 14
A9 15
A10 16
A11 17
GND 18
A12 19
A13 20
A14 21
V
CC
22
A15 23
A16 24
GND 25
A17 26
OEBA 27
LEBA 28
16501
Fig 4. Pin configuration
6.2 Pin description
Table 3:
Symbol
OEAB
LEAB
A0
GND
A1
A2
V
CC
A3
74ALVT16501_4
Pin description
Pin
1
2
3
4
5
6
7
8
Description
A-to-B output enable input
A-to-B latch enable input
data input or output (A side)
ground (0 V)
data input or output (A side)
data input or output (A side)
voltage supply
data input or output (A side)
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 04 — 8 August 2005
5 of 20
Microcontroller MCU
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