74ALVCH16373
2.5 V/3.3 V 16-bit D-type transparent latch; 3-state
Rev. 6 — 10 July 2012
Product data sheet
1. General description
The 74ALVCH16373 is 16-bit D-type transparent latch featuring separate D-type inputs for
each latch and 3-state outputs for bus oriented applications.
Incorporates bus hold data inputs which eliminate the need for external pull-up or
pull-down resistors to hold unused inputs.
One latch enable (LE) input and one output enable (OE) are provided per 8-bit section.
The 74ALVCH16373 consists of 2 sections of eight D-type transparent latches with 3-state
true outputs. When LE is HIGH, data at the nDn inputs enter the latches. In this condition
the latches are transparent, therefore a latch output will change each time its
corresponding D-input changes.
When LE is LOW, the latches store the information that was present at the nDn inputs at a
set-up time preceding the LOW-to-HIGH transition of LE. When OE is LOW, the contents
of the eight latches are available at the outputs. When OE is HIGH, the outputs go to the
high-impedance OFF-state. Operation of the OE input does not affect the state of the
latches.
2. Features and benefits
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 minimum noise and ground bounce
Direct interface with TTL levels
All data inputs have bus hold
Output drive capability 50
transmission lines at 85
C
Current drive
24
mA at V
CC
= 3.0 V
NXP Semiconductors
74ALVCH16373
2.5 V/3.3 V 16-bit D-type transparent latch; 3-state
3. Ordering information
Table 1.
Ordering information
Temperature range
40 C
to +85
C
Package
Name
74ALVCH16373DL
SSOP48
TSSOP48
Description
plastic shrink small outline package; 48 leads;
body width 7.5 mm
plastic thin shrink small outline package;
48 leads; body width 6.1 mm
Version
SOT370-1
SOT362-1
Type number
74ALVCH16373DGG
40 C
to +85
C
4. Functional diagram
1
1OE
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
1D0
1D1
1D2
1D3
1D4
1D5
1D6
1D7
2D0
2D1
2D2
2D3
2D4
2D5
2D6
2D7
1LE
48
2LE
25
001aam007
24
2OE
1Q0
1Q1
1Q2
1Q3
1Q4
1Q5
1Q6
1Q7
2Q0
2Q1
2Q2
2Q3
2Q4
2Q5
2Q6
2Q7
2
3
5
6
8
9
11
12
13
14
16
17
19
20
22
23
Fig 1.
Logic symbol
74ALVCH16373
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 10 July 2012
2 of 18
NXP Semiconductors
74ALVCH16373
2.5 V/3.3 V 16-bit D-type transparent latch; 3-state
1OE
1LE
2OE
2LE
1D0
1D1
1D2
1D3
1D4
1D5
1D6
1D7
2D0
2D1
2D2
2D3
2D4
2D5
2D6
2D7
1
48
24
25
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
1EN
C1
2EN
C4
3D
1
2
3
5
6
8
9
11
12
4D
2
13
14
16
17
19
20
22
23
1Q0
1Q1
1Q2
1Q3
1Q4
1Q5
1Q6
1Q7
2Q0
2Q1
2Q2
2Q3
2Q4
2Q5
2Q6
2Q7
001aam009
Fig 2.
IEC logic symbol
V
CC
data input
to internal circuit
mna705
Fig 3.
Bus hold circuit
1D0
D
Q
1Q0
2D0
D
Q
2Q0
LATCH
1
LE
LE
LATCH
9
LE
LE
1LE
2LE
1OE
to 7 other channels
2OE
to 7 other channels
001aam010
Fig 4.
Logic diagram
74ALVCH16373
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 10 July 2012
3 of 18
NXP Semiconductors
74ALVCH16373
2.5 V/3.3 V 16-bit D-type transparent latch; 3-state
5. Pinning information
5.1 Pinning
74ALVCH16373
1OE
1Q0
1Q1
GND
1Q2
1Q3
V
CC
1Q4
1Q5
1
2
3
4
5
6
7
8
9
48 1LE
47 1D0
46 1D1
45 GND
44 1D2
43 1D3
42 V
CC
41 1D4
40 1D5
39 GND
38 1D6
37 1D7
36 2D0
35 2D1
34 GND
33 2D2
32 2D3
31 V
CC
30 2D4
29 2D5
28 GND
27 2D6
26 2D7
25 2LE
001aam008
GND 10
1Q6 11
1Q7 12
2Q0 13
2Q1 14
GND 15
2Q2 16
2Q3 17
V
CC
18
2Q4 19
2Q5 20
GND 21
2Q6 22
2Q7 23
2OE 24
Fig 5.
Pin configuration
74ALVCH16373
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 10 July 2012
4 of 18
NXP Semiconductors
74ALVCH16373
2.5 V/3.3 V 16-bit D-type transparent latch; 3-state
5.2 Pin description
Table 2.
Symbol
1OE, 2OE
1Q0 to 1Q7
2Q0 to 2Q7
GND
V
CC
1D0 to 1D7
2D0 to 2D7
1LE, 2LE
Pin description
Pin
1, 24
2, 3, 5, 6, 8, 9, 11, 12
13, 14, 16, 17, 19, 20, 22, 23
4, 10, 15, 21, 28, 34, 39, 45
7, 18, 31, 42
47, 46, 44, 43, 41, 40, 38, 37
36, 35, 33, 32, 30, 29, 27, 26
48, 25
Description
output enable input (active LOW)
data outputs
data outputs
ground (0 V)
positive supply voltage
data inputs
data inputs
latch enable input (active HIGH)
6. Functional description
6.1 Function table
Table 3.
Inputs
nOE
L
L
L
L
H
H
[1]
Function table
[1]
Internal latches Outputs nQn
nLE
H
H
L
L
L
L
nDn
L
H
l
h
l
h
L
H
L
H
L
H
L
H
L
H
Z
Z
enable and read register
(transparent mode)
latch and read register
(hold mode)
latch register and disable outputs
Operating mode
H = HIGH voltage level;
L = LOW voltage level;
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH LE transition;
I = LOW voltage level one set-up time prior to the LOW-to-HIGH LE transition;
Z = high-impedance OFF-state.
74ALVCH16373
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 10 July 2012
5 of 18
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