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74LVT16373 • 74LVTH16373 Low Voltage 16-Bit Transparent Latch with 3-STATE Outputs
January 1999
Revised June 2005
74LVT16373 • 74LVTH16373
Low Voltage 16-Bit Transparent Latch
with 3-STATE Outputs
General Description
The LVT16373 and LVTH16373 contain sixteen non-invert-
ing latches with 3-STATE outputs and is intended for bus
oriented applications. The device is byte controlled. The
flip-flops appear transparent to the data when the Latch
Enable (LE) is HIGH. When LE is LOW, the data that meets
the setup time is latched. Data appears on the bus when
the Output Enable (OE) is LOW. When OE is HIGH, the
outputs are in a high impedance state.
The LVTH16373 data inputs include bushold, eliminating
the need for external pull-up resistors to hold unused
inputs.
These latches are designed for low-voltage (3.3V) V
CC
applications, but with the capability to provide a TTL inter-
face to a 5V environment. The LVT16373 and LVTH16373
are fabricated with an advanced BiCMOS technology to
achieve high speed operation similar to 5V ABT while
maintaining a low power dissipation.
Features
s
Input and output interface capability to systems at
5V V
CC
s
Bushold data inputs eliminate the need for external
pull-up resistors to hold unused inputs (74LVTH16373),
also available without bushold feature (74LVT16373)
s
Live insertion/extraction permitted
s
Power Up/Power Down high impedance provides
glitch-free bus loading
s
Outputs source/sink
32 mA/
64 mA
s
Functionally compatible with the 74 series 16373
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human-body model
!
2000V
Machine model
!
200V
Charged-device model
!
1000V
s
Also packaged in plastic Fine-Pitch Ball Grid Array
(FBGA) (Preliminary)
Ordering Code:
Order Number
74LVT16373GX
(Note 1)
74LVT16373MEA
(Note 2)
74LVT16373MTD
(Note 2)
74LVTH16373GX
(Note 1)
74LVTH16373MEA
(Note 2)
74LVTH16373MTD
(Note 2)
Package Number
BGA54A
(Preliminary)
MS48A
MTD48
BGA54A
(Preliminary)
MS48A
MTD48
Package Description
54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
[TAPE and REEL]
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
[TAPE and REEL]
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Note 1:
BGA package available in Tape and Reel only.
Note 2:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
© 2005 Fairchild Semiconductor Corporation
DS012021
www.fairchildsemi.com
74LVT16373 • 74LVTH16373
Connection Diagrams
Pin Assignment for SSOP and TSSOP
Pin Descriptions
Pin Names
OE
n
LE
n
I
0
–I
15
O
0
–O
15
NC
Description
Output Enable Input (Active LOW)
Latch Enable Input
Inputs
3-STATE Outputs
No Connect
FBGA Pin Assignments
1
A
B
C
D
E
F
G
H
J
O
0
O
2
O
4
O
6
O
8
O
10
O
12
O
14
O
15
2
NC
O
1
O
3
O
5
O
7
O
9
O
11
O
13
NC
3
OE
1
NC
V
CC
GND
GND
GND
V
CC
NC
OE
2
4
LE
1
NC
V
CC
GND
GND
GND
V
CC
NC
LE
2
5
NC
I
1
I
3
I
5
I
7
I
9
I
11
I
13
NC
6
I
0
I
2
I
4
I
6
I
8
I
10
I
12
I
14
I
15
Truth Tables
Inputs
LE
1
Pin Assignment for FBGA
X
H
H
L
OE
1
H
L
L
L
Inputs
LE
2
X
H
H
(Top Thru View)
H
L
X
Z
O
o
Outputs
I
0
–I
7
X
L
H
X
O
0
–O
7
Z
L
H
O
o
Outputs
I
8
–I
15
X
L
H
X
O
8
–O
15
Z
L
H
O
o
OE
2
H
L
L
L
L
HIGH Voltage Level
LOW Voltage Level
Immaterial
HIGH Impedance
Previous output prior to HIGH-to-LOW transition of LE
www.fairchildsemi.com
2
74LVT16373 • 74LVTH16373
Functional Description
The LVT16373 and LVTH16373 contain sixteen D-type
latches with 3-STATE standard outputs. The device is byte
controlled with each byte functioning identically, but inde-
pendent of the other. Control pins can be shorted together
to obtain full 16-bit operation. The following description
applies to each byte. When the Latch Enable (LE
n
) input is
HIGH, data on the D
n
enters the latches. In this condition
the latches are transparent, i.e, a latch output will change
states each time its D input changes. When LE
n
is LOW,
the latches store information that was present on the D
inputs a setup time preceding the HIGH-to-LOW transition
of LE
n
. The 3-STATE standard outputs are controlled by
the Output Enable (OE
n
) input. When OE
n
is LOW, the
standard outputs are in the 2-state mode. When OE
n
is
HIGH, the standard outputs are in the high impedance
mode but this does not interfere with entering new data into
the latches.
Logic Diagrams
Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays.
3
www.fairchildsemi.com
74LVT16373 • 74LVTH16373
Absolute Maximum Ratings
(Note 3)
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
Parameter
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
Conditions
Units
V
V
Output in 3-STATE
Output in HIGH or LOW State (Note 4)
V
I
GND
V
O
GND
V
O
!
V
CC
V
O
!
V
CC
Output at HIGH State
Output at LOW State
V
mA
mA
mA
mA
mA
0.5 to
4.6
0.5 to
7.0
0.5 to
7.0
0.5 to
7.0
50
50
64
128
r
64
r
128
65 to
150
q
C
Recommended Operating Conditions
Symbol
V
CC
V
I
I
OH
I
OL
T
A
Supply Voltage
Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free-Air Operating Temperature
Input Edge Rate, V
IN
0.8V–2.0V, V
CC
3.0V
Parameter
Min
2.7
0
Max
3.6
5.5
Units
V
V
mA
mA
32
64
40
0
85
10
q
C
ns/V
'
t/
'
V
Note 3:
Absolute Maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions
beyond those indicated may adversely affect device reliability. Functional operation under absolute maximum rated conditions is not implied.
Note 4:
I
O
Absolute Maximum Rating must be observed.
DC Electrical Characteristics
Symbol
V
IK
V
IH
V
IL
V
OH
Parameter
Input Clamp Diode Voltage
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
V
CC
(V)
2.7
2.7–3.6
2.7–3.6
2.7–3.6
2.7
3.0
V
OL
Output LOW Voltage
2.7
2.7
3.0
3.0
3.0
I
I(HOLD)
(Note 5)
I
I(OD)
(Note 5)
I
I
Bushold Input Over-Drive
Current to Change State
Input Current
Control Pins
Data Pins
I
OFF
I
PU/PD
I
OZL
I
OZH
I
OZH
Power Off Leakage Current
Power Up/Down 3-STATE
Output Current
3-STATE Output Leakage Current
3-STATE Output Leakage Current
3-STATE Output Leakage Current
Bushold Input Minimum Drive
3.0
3.0
3.6
3.6
3.6
0
0–1.5V
3.6
3.6
3.6
75
V
CC
0.2
2.4
2.0
0.2
0.5
0.4
0.5
0.55
V
V
2.0
0.8
T
A
40
q
C to
85
q
C
Max
Min
Units
V
V
V
I
I
Conditions
1.2
18 mA
V
O
d
0.1V or
V
O
t
V
CC
0.1V
I
OH
I
OH
I
OH
I
OL
I
OL
I
OL
I
OL
I
OL
V
I
V
I
100
P
A
8 mA
32 mA
100
P
A
24 mA
16 mA
32 mA
64 mA
0.8V
2.0V
75
500
P
A
P
A
10
(Note 6)
(Note 7)
V
I
5.5V
0V or V
CC
0V
V
CC
0.5V to 3.0V
GND or V
CC
0.5V
3.0V
V
I
V
I
V
I
500
r
1
5
1
P
A
r
100
r
100
5
5
10
P
A
P
A
P
A
P
A
P
A
0V
d
V
I
or V
O
d
5.5V
V
O
V
I
V
O
V
O
V
CC
V
O
d
5.5V
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4
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