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74ALVT16601
18-bit universal bus transceiver; 3-state
Rev. 03 — 5 July 2005
Product data sheet
1. General description
The 74ALVT16601 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 LOW,
the outputs are active. When OEAB is HIGH, the outputs are in the high-impedance state.
The clocks can be controlled with the clock enable inputs (CEAB and CEBA).
Data flow for B-to-A is similar to that of A-to-B but uses OEBA, LEBA and CPBA.
Active bus hold circuitry is provided to hold unused or floating data inputs at a valid logic
level.
2. Features
s
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 and
−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 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 200 V
Philips Semiconductors
74ALVT16601
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
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
supply current
C
L
= 30 pF
C
L
= 30 pF
-
-
1.8
2.2
4
8
-
-
-
40
1.9
2
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
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
outputs disabled
4. Ordering information
Table 2:
Ordering information
Package
Temperature range
74ALVT16601DL
−40 °C
to +85
°C
Name
SSOP56
Description
plastic shrink small outline package; 56 leads; body
width 7.5 mm
Version
SOT371-1
SOT364-1
Type number
74ALVT16601DGG
−40 °C
to +85
°C
TSSOP56 plastic thin shrink small outline package; 56 leads;
body width 6.1 mm
74ALVT16601_3
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 5 July 2005
2 of 20
Philips Semiconductors
74ALVT16601
18-bit universal bus transceiver; 3-state
5. Functional diagram
1
56
55
2
27
29
30
28
OEAB
CEAB
CPAB
LEAB
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
3
5
6
8
9
10
12
13
14
15
16
17
19
20
21
23
24
26
54
52
51
49
48
47
45
44
43
42
41
40
38
37
36
34
33
31
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
EN1
G2
2C3
C3
G2
EN4
G5
5C6
C6
G5
3D
4
1
6D
52
51
49
48
47
45
44
43
42
41
40
38
37
36
34
33
31
001aad317
OEBA
CEBA
CPBA
LEBA
A0
3
54
B0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
5
6
8
9
10
12
13
14
15
16
17
19
20
21
23
24
26
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
OEAB
LEAB
CPAB
CEAB
1
2 55 56 29 30 28 27
OEBA
LEBA
CPBA
CEBA
001aad316
A11
A12
A13
A14
A15
A16
A17
Fig 1. Logic symbol
Fig 2. IEC logic symbol
74ALVT16601_3
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 5 July 2005
3 of 20
Philips Semiconductors
74ALVT16601
18-bit universal bus transceiver; 3-state
OEAB
CEAB
CPAB
LEAB
LEBA
CPBA
CEBA
OEBA
A0
1
56
55
2
28
30
29
27
3
CE
ID
C1
CLK
CE
ID
C1
CLK
54
B0
to 17 other channels
001aad249
Fig 3. Logic diagram
74ALVT16601_3
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 5 July 2005
4 of 20
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