SN54ACT16374, 74ACT16374
16-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS124B MARCH 1990 REVISED APRIL 1996
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Members of the Texas Instruments
Widebus
t
Family
D
Inputs Are TTL-Voltage Compatible
D
3-State Bus-Driving True Outputs
D
Flow-Through Architecture Optimizes
PCB Layout
D
Distributed Center-Pin V
CC
and GND
Configurations Minimize High-Speed
Switching Noise
D
EPIC
t
(Enhanced-Performance Implanted
CMOS) 1-
m
m Process
D
500-mA Typical Latch-Up Immunity at
125
C
D
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) Packages Using
25-mil Center-to-Center Pin Spacings and
380-mil Fine-Pitch Ceramic Flat (WD)
Packages Using 25-mil Center-to-Center
Pin Spacings
description
The SN54ACT16374 and 74ACT16374 are 16-bit
edge-triggered D-type flip-flops with 3-state
outputs designed specifically for driving
highly-capacitive or relatively low-impedance
loads. They are particularly suitable for
implementing buffer registers, I/O ports,
bidirectional bus drivers, and working registers.
These devices can be used as two 8-bit flip-flops or one 16-bit flip-flop. On the positive transition of the clock
(CLK) input, the Q outputs of the flip-flop take on the logic levels set up at the data (D) inputs.
An output-enable input (OE) can be used to place the outputs in either a normal logic state (high or low logic
levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines
significantly. The high-impedance state provides the capability to drive bus lines in a bus-organized system
without need for interface or pullup components. OE does not affect the internal operations of the flip-flop. Old
data can be retained or new data can be entered while the outputs are in the high-impedance state.
The 74ACT16374 is packaged in TI's shrink small-outline package, which provides twice the I/O pin count and
functionality of standard small-outline packages in the same printed-circuit board area.
The SN54ACT16374 is characterized for operation over the full military temperature range of 55
C to 125
C.
The 74ACT16374 is characterized for operation from 40
C to 85
C.
Copyright
1996, 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.
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.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
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
1CLK
1D1
1D2
GND
1D3
1D4
V
CC
1D5
1D6
GND
1D7
1D8
2D1
2D2
GND
2D3
2D4
V
CC
2D5
2D6
GND
2D7
2D8
2CLK
SN54ACT16374 . . . WD PACKAGE
74ACT16374 . . . DL PACKAGE
(TOP VIEW)
SN54ACT16374, 74ACT16374
16-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS124B MARCH 1990 REVISED APRIL 1996
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
(each section)
INPUTS
OUTPUT
OE
CLK
D
Q
L
H
H
L
L
L
L
H or L
X
Q0
H
X
X
Z
logic symbol
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
1OE
2OE
EN2
1
48
1CLK
1D
47
1D1
46
1D2
44
1D3
43
1D4
1Q1
2
1Q2
3
1Q3
5
1Q4
6
2
41
1D5
40
1D6
38
1D7
37
1D8
1Q5
8
1Q6
9
1Q7
11
1Q8
12
3D
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
4
EN4
24
25
2CLK
C1
C3
SN54ACT16374, 74ACT16374
16-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS124B MARCH 1990 REVISED APRIL 1996
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram (positive logic)
1OE
1CLK
1D1
To Seven Other Channels
1Q1
2OE
2CLK
2D1
2Q1
To Seven Other Channels
1
48
47
24
25
36
C1
1D
13
2
C1
1D
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1)
0.5 V to V
CC
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
(see Note 1)
0.5 V to V
CC
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
)
20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to V
CC
)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND
400 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum power dissipation at T
A
= 55
C (in still air) (see Note 2): 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 voltage ratings may be exceeded if the input and output current ratings are observed.
2. The maximum package power dissipation is calculated using a junction temperature of 150
_
C and a board trace length of 750 mils.
recommended operating conditions (see Note 3)
SN54ACT16374
74ACT16374
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage (see Note 4)
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
IOH
High-level output current
24
24
mA
IOL
Low-level output current
24
24
mA
D
t/
D
v
Input transition rise or fall rate
0
10
0
10
ns/V
TA
Operating free-air temperature
55
125
40
85
C
NOTES:
3. Unused inputs must be held high or low to prevent them from floating.
4. All VCC and GND pins must be connected to the proper voltage supply.
SN54ACT16374, 74ACT16374
16-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS124B MARCH 1990 REVISED APRIL 1996
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
C
SN54ACT16374
74ACT16374
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
IOH = 50
m
A
4.5 V
4.4
4.4
4.4
IOH = 50
m
A
5.5 V
5.4
5.4
5.4
IOH = 24 mA
4.5 V
3.94
3.7
3.8
VOH
IOH = 24 mA
5.5 V
4.94
4.7
4.8
V
IOH = 50 mA
{
5.5 V
3.85
IOH = 75 mA
{
5.5 V
3.85
IOL = 50
m
A
4.5 V
0.1
0.1
0.1
IOL = 50
m
A
5.5 V
0.1
0.1
0.1
IOL = 24 mA
4.5 V
0.36
0.5
0.44
VOL
IOL = 24 mA
5.5 V
0.36
0.5
0.44
V
IOL = 50 mA
{
5.5 V
1.65
IOL = 75 mA
{
5.5 V
1.65
II
VI = VCC or GND
5.5 V
0.1
1
1
m
A
IOZ
VO = VCC or GND
5.5 V
0.5
10
5
m
A
ICC
VI = VCC or GND,
IO = 0
5.5 V
8
160
80
m
A
D
I
}
One input at 3.4 V,
5 5 V
0 9
1
1
mA
D
ICC
}
,
Other inputs at GND or VCC
5.5 V
0.9
1
1
mA
Ci
VI = VCC or GND
5 V
4.5
pF
Co
VO = VCC or GND
5 V
12
pF
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V to VCC.
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
TA = 25
C
SN54ACT16374
74ACT16374
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
fclock
Clock frequency
0
65
0
65
0
65
MHz
t
Pulse duration
CLK low
7.5
7.5
7.5
ns
tw
Pulse duration
CLK high
4.5
4.5
4.5
ns
tsu
Setup time, data before CLK
6.5
6.5
6.5
ns
th
Hold time, data after CLK
1
1
1
ns
SN54ACT16374, 74ACT16374
16-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS124B MARCH 1990 REVISED APRIL 1996
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
TA = 25
C
SN54ACT16374
74ACT16374
UNIT
PARAMETER
(INPUT)
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
fmax
65
65
65
MHz
tPLH
CLK
Q
5.1
8.8
10.9
5.1
13.2
5.1
12.4
ns
tPHL
CLK
Q
5.3
8.8
10.9
5.3
13.1
5.3
12.2
ns
tPZH
OE
Q
3.7
8.4
10.5
3.7
12.7
3.7
11.9
ns
tPZL
OE
Q
4.4
9.7
11.9
4.4
14.3
4.4
13.4
ns
tPHZ
OE
Q
5.4
7.9
9.8
5.4
10.9
5.4
10.4
ns
tPLZ
OE
Q
4.9
7.2
9.1
4.9
10.2
4.9
9.8
ns
operating characteristics, V
CC
= 5 V, T
A
= 25
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
C d
Power dissipation capacitance per flip flop
Outputs enabled
CL = 50 pF
f = 1 MHz
52
pF
Cpd
Power dissipation capacitance per flip-flop
Outputs disabled
CL = 50 pF,
f = 1 MHz
38
pF
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