SN74LVC16373
16-BIT TRANSPARENT D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCAS315B – NOVEMBER 1993 – REVISED JUL Y 1995
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Member of the Texas Instruments
Widebus
Family
D
EPIC
(Enhanced-Performance Implanted
CMOS) Submicron Process
D
T ypical V
OLP
(Output Ground Bounce)
< 0.8 V at VCC = 3.3 V, TA = 25°C
D
T ypical V
OHV
(Output VOH Undershoot)
> 2 V at VCC = 3.3 V, TA = 25°C
D
Latch-Up Performance Exceeds 250 mA
Per JEDEC Standard JESD-17
D
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages
description
This 16-bit transparent D-type latch is designed
for 2.7-V to 3.6-V VCC operation.
The SN74LVC16373 is particularly suitable for
implementing buffer registers, I/O ports,
bidirectional bus drivers, and working registers. It
can be used as two 8-bit latches or one 16-bit
latch. When the latch-enable (LE) input is high, the
Q outputs follow the data (D) inputs. When LE is
taken low, the Q outputs are latched at the levels
set up at the D inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high
or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive
the bus lines significantly . The high-impedance state and the increased drive provide the capability to drive bus
lines without need for interface or pullup components.
OE
does not affect internal operations of the latch. Old data can be retained or new data can be entered while
the outputs are in the high-impedance state.
T o ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74LVC16373 is characterized for operation from –40°C to 85°C.
Copyright 1995, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
DGG OR DL PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE
1Q1
1Q2
GND
1Q3
1Q4
V
CC
1Q5
1Q6
GND
1Q7
1Q8
2Q1
2Q2
GND
2Q3
2Q4
V
CC
2Q5
2Q6
GND
2Q7
2Q8
2OE
1LE
1D1
1D2
GND
1D3
1D4
V
CC
1D5
1D6
GND
1D7
1D8
2D1
2D2
GND
2D3
2D4
V
CC
2D5
2D6
GND
2D7
2D8
2LE
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SN74LVC16373
16-BIT TRANSPARENT D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCAS315B – NOVEMBER 1993 – REVISED JUL Y 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
(each 8-bit section)
INPUTS
OUTPUT
OE
LE D
Q
L H H H
L HL L
L LX Q
0
H X X Z
logic symbol
†
logic diagram (positive logic)
1OE
2OE
48
47
1OE
1
1LE
1D1
To Seven Other Channels
2
1Q1
C1
1D
25
36
2OE
24
2LE
2D1
13
2Q1
C1
1D
To Seven Other Channels
1EN
1
C3
48
1LE
3D
47
1D1
46
1D2
44
1D3
43
1D4
1Q1
2
1Q2
3
1Q3
5
1Q4
6
1
41
1D5
40
1D6
38
1D7
37
1D8
1Q5
8
1Q6
9
1Q7
11
1Q8
12
4D
36
2D1
35
2D2
33
2D3
32
2D4
2Q1
13
2Q2
14
2Q3
16
2Q4
17
30
2D5
29
2D6
27
2D7
26
2D8
2Q5
19
2Q6
20
2Q7
22
2Q8
23
2
2EN
24
C4
25
2LE
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
SN74LVC16373
16-BIT TRANSPARENT D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCAS315B – NOVEMBER 1993 – REVISED JUL Y 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
–0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI (see Note 1) –0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO (see Notes 1 and 2) –0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK (VI < 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0 or VO > VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(VO = 0 to VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum power dissipation at TA = 55°C (in still air) (see Note 3): DGG package 0.85 W. . . . . . . . . . . . . . .
DL package 1.2 W. . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. This value is limited to 4.6 V maximum.
3. The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils.
For more information, refer to the
Package Thermal Considerations
application note in the 1994
ABT Advanced BiCMOS T echnology
Data Book,
literature number SCBD002B.
recommended operating conditions (see Note 4)
MIN MAX UNIT
V
CC
Supply voltage 2.7 3.6 V
V
IH
High-level input voltage VCC = 2.7 V to 3.6 V 2 V
V
IL
Low-level input voltage VCC = 2.7 V to 3.6 V 0.8 V
V
I
Input voltage 0 V
CC
V
V
O
Output voltage 0 V
CC
V
p
VCC = 2.7 V –12
IOHHigh-level output current
VCC = 3 V –24
mA
p
VCC = 2.7 V 12
IOLLow-level output current
VCC = 3 V 24
mA
∆t/∆V Input transition rise or fall rate 0 10 ns/V
T
A
Operating free-air temperature –40 85 °C
NOTE 4: Unused control inputs must be held high or low to prevent them from floating.
SN74LVC16373
16-BIT TRANSPARENT D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCAS315B – NOVEMBER 1993 – REVISED JUL Y 1995
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS V
CC
†
MIN TYP‡MAX UNIT
IOH = –100 µA MIN to MAX VCC–0.2
2.7 2.2
VOHI
OH
= –12
mA
3 2.4
V
IOH = –24 mA 3 2
IOL = 100 µA MIN to MAX 0.2
V
OL
IOL = 12 mA 2.7 0.4
V
IOL = 24 mA 3 0.55
I
I
VI = VCC or GND 3.6 ±5 µA
p
VI = 0.8 V
75
I
I(hold)
Data inputs
VI = 2 V
3
–75
µ
A
I
OZ
VO = VCC or GND 3.6 ±10 µA
I
CC
VI = VCC or GND, IO = 0 3.6 40 µA
n
I
CC
One input at VCC – 0.6 V, Other inputs at VCC or GND 3 V to 3.6 V 500 µA
C
i
VI = VCC or GND 3.3 3.5 pF
C
o
VO = VCC or GND 3.3 7 pF
†
For conditions shown as MIN or MAX, use the appropriate values under recommended operating conditions.
‡
All typical values are at VCC = 3.3 V, TA = 25°C.
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figure 1)
VCC = 3.3 V
± 0.3 V
VCC = 2.7 V
UNIT
MIN MAX MIN MAX
UNIT
t
w
Pulse duration, LE high 4 4 ns
t
su
Setup time, data before LE↓ 2 2 ns
t
h
Hold time, data after LE↓ 2 2 ns
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC = 3.3 V
± 0.3 V
VCC = 2.7 V
UNIT
(INPUT)
(OUTPUT)
MIN MAX MIN MAX
D
1.5 7 8
t
p
d
LE
Q
2 8 9
ns
t
en
OE
Q 1.5 8 9 ns
t
dis
OE
Q 1.5 7 8 ns
operating characteristics, T
A
= 25°C
PARAMETER
TEST CONDITIONS TYP UNIT
p
p
p
Outputs enabled
p
20
p
CpdPower dissipation capacitance per latch
Outputs disabled
C
L
= 50 pF, f = 10 MHz
4
pF
SN74LVC16373
16-BIT TRANSPARENT D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCAS315B – NOVEMBER 1993 – REVISED JUL Y 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
500 Ω
1.5 V
t
h
t
su
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT FOR OUTPUTS
S1
6 V
Open
GND
500 Ω
Data Input
Timing Input
1.5 V
2.7 V
0 V
1.5 V 1.5 V
2.7 V
0 V
2.7 V
0 V
1.5 V 1.5 V
t
w
Input
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS
PULSE DURATION
t
PLH
t
PHL
t
PHL
t
PLH
V
OH
V
OH
V
OL
V
OL
1.5 V 1.5 V
2.7 V
0 V
1.5 V1.5 V
Input
1.5 V
Output
Control
Output
Waveform 1
S1 at 6 V
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
V
OL
V
OH
t
PZL
t
PZH
t
PLZ
t
PHZ
1.5 V
1.5 V
3 V
0 V
1.5 V
VOL + 0.3 V
1.5 V
VOH – 0.3 V
[
0 V
2.7 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
Output
Output
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
Open
6 V
GND
TEST S1
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. t
PLZ
and t
PHZ
are the same as t
dis
.
F. t
PZL
and t
PZH
are the same as ten.
G. t
PLH
and t
PHL
are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
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Copyright 1998, Texas Instruments Incorporated
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