74ALVC16245; 74ALVCH16245
16-bit transceiver with direction pin; 3-state
Rev. 03 — 12 May 2004
Product data sheet
1. General description
The 74ALVC16245; 74ALVCH16245 is a 16-bit transceiver featuring non-inverting 3-state
bus compatible outputs in both send and receive directions.
The 74ALVC16245; 74ALVCH16245 features two output enable inputs (pins nOE) for
easy cascading and two send or receive inputs (pins nDIR) for direction control. Pins nOE
control the outputs so that the buses are effectively isolated. This device can be used as
two 8-bit transceivers or one 16-bit transceiver.
The 74ALVCH16245 has an active bushold circuitry which is provided to hold unused or
floating data inputs at a valid logic level. This feature eliminates the need for external
pull-up or pull-down resistors.
2. Features
s
s
s
s
s
s
s
s
s
Wide supply voltage range from 1.2 V to 3.6 V
Complies with JEDEC standard JESD8-B
CMOS low power consumption
MULTIBYTE flow-through standard pin-out architecture
Low inductance multiple V
CC
and GND pins for minimize noise and ground bounce
Direct interface with TTL levels
All data inputs have bushold (74ALVCH16245 only)
Output drive capability 50
Ω
transmission lines at 85
°C
Current drive
±24
mA at V
CC
= 3.0 V.
Philips Semiconductors
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
3. Quick reference data
Table 1:
Symbol
Quick reference data
Parameter
Conditions
V
CC
= 2.5 V; C
L
= 30 pF
V
CC
= 3.3 V; C
L
= 50 pF
Min
-
-
-
-
[1] [2]
[1] [2]
Typ
2.0
1.9
4.0
8.0
29
5
Max
-
-
-
-
-
-
Unit
ns
ns
pF
pF
pF
pF
t
PHL
, t
PLH
propagation delay
An to Bn; Bn to An
C
I
C
I/O
C
PD
input capacitance
input/output
capacitance
power dissipation
outputs enabled
capacitance per buffer outputs disabled
-
-
[1]
C
PD
is used to determine the dynamic power dissipation (P
D
in
µW).
P
D
= C
PD
×
V
CC2
×
f
i
×
N +
∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts;
N = total load switching outputs;
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs.
The condition is V
I
= GND to V
CC
.
[2]
4. Ordering information
Table 2:
Ordering information
Package
Temperature range Name
74ALVC16245DGG
74ALVCH16245DGG
74ALVC16245DL
74ALVCH16245DL
−40 °C
to +85
°C
−40 °C
to +85
°C
−40 °C
to +85
°C
−40 °C
to +85
°C
SSOP48
TSSOP48
Description
plastic thin shrink small outline package;
48 leads; body width 6.1 mm
plastic shrink small outline package; 48 leads;
body width 7.5 mm
Version
SOT362-1
SOT370-1
Type number
9397 750 13117
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 03 — 12 May 2004
2 of 17
Philips Semiconductors
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
5. Functional diagram
48
1OE
1
1DIR
25
2OE
24
2DIR
1
1DIR
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
2A0
2A1
2A2
2A3
2A4
2A5
2A6
2A7
1OE
48
24
2DIR
1B0
1B1
1B2
1B3
1B4
1B5
1B6
1B7
2B0
2B1
2B2
2B3
2B4
2B5
2B6
2B7
2OE
25
001aaa853
G3
3EN1[BA]
3EN2[AB]
G6
6EN1[BA]
6EN2[AB]
2
2
3
5
6
8
9
11
12
13
14
16
17
19
20
22
23
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1A0
47
1
2
1B0
46
44
43
41
40
38
37
36
4
5
35
33
32
30
29
27
26
3
5
6
8
9
11
12
13
1B1
1B2
1B3
1B4
1B5
1B6
1B7
2B0
14
16
17
19
20
22
23
2B1
2B2
2B3
2B4
2B5
2B6
2B7
001aaa790
Fig 1. Logic symbol.
Fig 2. IEC logic symbol.
VCC
data
input
to internal circuit
mna004
Fig 3. Bushold circuit.
9397 750 13117
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 03 — 12 May 2004
3 of 17
Philips Semiconductors
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
1
1DIR
1OE
1A0
24
48
2DIR
2OE
2A0
25
47
1B0
2
1A1
46
1B1
3
1A2
44
1B2
5
1A3
43
1B3
6
1A4
41
1B4
8
1A5
40
1B5
9
1A6
38
1B6
11
1A7
37
1B7
12
36
2B0
13
2A1
35
2B1
14
2A2
33
2B2
16
2A3
32
2B3
17
2A4
30
2B4
19
2A5
29
2B5
20
2A6
27
2B6
22
2A7
26
2B7
23
001aaa789
Fig 4. Logic diagram.
9397 750 13117
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 03 — 12 May 2004
4 of 17
Philips Semiconductors
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
6. Pinning information
6.1 Pinning
1DIR
1B0
1B1
GND
1B2
1B3
V
CC
1B4
1B5
1
2
3
4
5
6
7
8
9
48 1OE
47 1A0
46 1A1
45 GND
44 1A2
43 1A3
42 V
CC
41 1A4
40 1A5
39 GND
38 1A6
37 1A7
36 2A0
35 2A1
34 GND
33 2A2
32 2A3
31 V
CC
30 2A4
29 2A5
28 GND
27 2A6
26 2A7
25 2OE
001aaa791
GND 10
1B6 11
1B7 12
2B0 13
2B1 14
GND 15
2B2 16
2B3 17
V
CC
18
2B4 19
2B5 20
GND 21
2B6 22
2B7 23
2DIR 24
16245
Fig 5. Pin configuration.
6.2 Pin description
Table 3:
Pin
1
2
3
4
5
6
7
8
9
10
11
9397 750 13117
Pin description
Symbol
1DIR
1B0
1B1
GND
1B2
1B3
V
CC
1B4
1B5
GND
1B6
Description
direction control input
data output or input
data output or input
ground (0 V)
data output or input
data output or input
positive supply voltage
data output or input
data output or input
ground (0 V)
data output or input
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 03 — 12 May 2004
5 of 17
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