TI 54AC16374

54AC16374, 74AC16374
16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS123B – MARCH 1990 – REVISED APRIL 1996
D
D
D
D
D
D
D
D
54AC16374 . . . WD PACKAGE
74AC16374 . . . DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus  Family
3-State True Outputs
Full Parallel Access for Loading
Flow-Through Architecture Optimizes
PCB Layout
Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
EPIC  (Enhanced-Performance Implanted
CMOS) 1-µm Process
500-mA Typical Latch-Up Immunity at
125°C
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
1OE
1Q1
1Q2
GND
1Q3
1Q4
VCC
1Q5
1Q6
GND
1Q7
1Q8
2Q1
2Q2
GND
2Q3
2Q4
VCC
2Q5
2Q6
GND
2Q7
2Q8
2OE
description
The ’AC16374 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.
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
1CLK
1D1
1D2
GND
1D3
1D4
VCC
1D5
1D6
GND
1D7
1D8
2D1
2D2
GND
2D3
2D4
VCC
2D5
2D6
GND
2D7
2D8
2CLK
The ’AC16374 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.
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.
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 74AC16374 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 54AC16374 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74AC16374 is characterized for operation from –40°C to 85°C.
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.
Copyright  1996, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
POST OFFICE BOX 655303
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1
54AC16374, 74AC16374
16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS123B – MARCH 1990 – REVISED APRIL 1996
FUNCTION TABLE
INPUTS
OE
CLK
D
OUTPUT
Q
L
↑
H
H
L
↑
L
L
L
X
X
Q0
L
↓
X
Q0
H
X
X
Z
logic symbol†
1OE
1CLK
2OE
2CLK
1D1
1D2
1D3
1D4
1D5
1D6
1D7
1D8
2D1
2D2
2D3
2D4
2D5
2D6
2D7
2D8
1
1EN
48
24
25
47
C1
2EN
C2
1D
46
2
1
44
5
43
6
41
8
40
9
38
11
37
12
36
13
2D
35
2
14
33
16
32
17
30
19
29
20
27
22
26
23
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2
3
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1Q1
1Q2
1Q3
1Q4
1Q5
1Q6
1Q7
1Q8
2Q1
2Q2
2Q3
2Q4
2Q5
2Q6
2Q7
2Q8
54AC16374, 74AC16374
16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS123B – MARCH 1990 – REVISED APRIL 1996
logic diagram (positive logic)
1OE
1CLK
1
2OE
48
2CLK
C1
1D1
47
2
1D
24
25
C1
1Q1
2D1
36
1D
13
2Q1
To Seven Other Channels
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±400 mA
Maximum power package dissipation at TA = 55°C (in still air)(see Note 2): DL package . . . . . . . . . . . 1.2 W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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.
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3
54AC16374, 74AC16374
16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS123B – MARCH 1990 – REVISED APRIL 1996
recommended operating conditions (see Note 3)
54AC16374
VCC
VIH
Supply voltage
VCC = 3 V
VCC = 4.5 V
High-level input voltage
VCC = 5.5 V
VCC = 3 V
VIL
VI
VO
IOH
IOL
∆t/∆v
Low-level input voltage
NOM
MAX
3
5
5.5
3
5
5.5
3.15
0.9
1.35
1.35
1.65
1.65
0
VCC
VCC
0
–4
–4
–24
–24
VCC = 5.5 V
VCC = 3 V
–24
–24
12
12
VCC = 4.5 V
VCC = 5.5 V
24
24
24
24
TA
Operating free-air temperature
NOTE 3: Unused inputs must be held high or low to prevent them from floating.
V
V
0.9
VCC
VCC
0
Input transition rise or fall rate
UNIT
3.85
VCC = 3 V
VCC = 4.5 V
Low-level output current
MAX
3.15
0
Output voltage
NOM
2.1
3.85
Input voltage
MIN
2.1
VCC = 4.5 V
VCC = 5.5 V
High-level output current
74AC16374
MIN
V
V
V
mA
mA
0
10
0
10
ns/V
–55
125
–40
85
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = –50 µA
VOH
IOH = –4 mA
ICC
Ci
Co
TA = 25°C
TYP
MAX
54AC16374
MIN
74AC16374
MIN
3V
2.9
2.9
2.9
4.5 V
4.4
4.4
4.4
5.5 V
5.4
5.4
5.4
2.58
2.48
2.48
3.94
3.8
3.8
IOL = –24
24 mA
A
5.5 V
4.94
IOH = –75 mA†
5.5 V
IOL = 12 mA
4.8
4.8
3.85
3.85
MAX
UNIT
V
3V
0.1
0.1
0.1
4.5 V
0.1
0.1
0.1
5.5 V
0.1
0.1
0.1
3V
0.36
0.44
0.44
4.5 V
0.36
0.44
0.44
5.5 V
0.36
0.44
0.44
1.65
1.65
V
IOL = 75 mA†
VI = VCC or GND
5.5 V
5.5 V
±0.1
±1
±1
µA
VO = VCC or GND
VI = VCC or GND,
5.5 V
±0.5
±5
±5
µA
8
80
80
µA
VI = VCC or GND
VO = VCC or GND
IO = 0
5.5 V
5V
3
pF
5V
11
pF
† Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
4
MAX
3V
IOL = 24 mA
II
IOZ
MIN
4.5 V
IOL = 50 µA
VOL
VCC
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
54AC16374, 74AC16374
16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS123B – MARCH 1990 – REVISED APRIL 1996
timing requirements over recommended operating free-air temperature range
VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
TA = 25°C
MIN
MAX
fclock
tw
Clock frequency
0
tsu
th
Setup time, data before CLK↑
Pulse duration
CLK high or low
Hold time, data after CLK↑
60
54AC16374
MIN
MAX
0
60
74AC16374
MIN
MAX
0
60
UNIT
MHz
8.3
8.3
8.3
ns
7.5
7.5
7.5
ns
0
0
0
ns
timing requirements over recommended operating free-air temperature range
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
TA = 25°C
MIN
MAX
0
74AC16374
MIN
MAX
MIN
MAX
0
100
0
100
UNIT
fclock
tw
Clock frequency
5
5
5
ns
tsu
th
Setup time, data before CLK↑
5
5
5
ns
Hold time, data after CLK↑
0
0
0
ns
Pulse duration
CLK high or low
100
54AC16374
MHz
switching characteristics over recommended operating free-air temperature range
VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
fmax
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
FROM
(INPUT)
TO
(OUTPUT)
TA = 25°C
MIN
TYP
MAX
60
CLK
Q
OE
Q
OE
Q
54AC16374
MIN
74AC16374
MAX
MIN
60
MAX
60
UNIT
MHz
4.9
12.2
15
4.9
17
4.9
17
4.8
11.9
14.3
4.8
15.7
4.8
15.7
4.3
11.9
14.7
4.3
16.8
4.3
16.8
5.3
15.5
18.7
5.3
21.2
5.3
21.2
4
7.3
9
4
9.8
4
9.8
3.8
7.1
8.8
3.8
9.4
3.8
9.4
ns
ns
ns
switching characteristics over recommended operating free-air temperature range
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
fmax
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
FROM
(INPUT)
TO
(OUTPUT)
TA = 25°C
MIN
TYP
MAX
100
CLK
Q
OE
Q
OE
Q
54AC16374
MIN
MAX
74AC16374
MIN
100
MAX
100
UNIT
MHz
3.8
7.6
9.5
3.8
10.8
3.8
10.8
3.8
7.6
9.5
3.8
10.6
3.8
10.6
3.2
7.2
9
3.2
10.2
3.2
10.2
3.8
8.7
10.7
3.8
12.1
3.8
12.1
3.7
6
7.5
3.7
8.2
3.7
8.2
3.5
5.8
7.3
3.5
7.9
3.5
7.9
ns
ns
ns
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
Cpd
d
Power dissipation capacitance per flip-flop
flip flop
TEST CONDITIONS
Outputs enabled
Outputs disabled
CL = 50 pF,
pF
f = 1 MHz
TYP
49
32
UNIT
pF
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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54AC16374, 74AC16374
16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS123B – MARCH 1990 – REVISED APRIL 1996
PARAMETER MEASUREMENT INFORMATION
2 × VCC
S1
500 Ω
From Output
Under Test
Open
GND
CL = 50 pF
(see Note A)
TEST
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCC
GND
500 Ω
LOAD CIRCUIT
Timing Input
0V
tw
50%
50%
th
tsu
VCC
Input
VCC
50%
VCC
50%
50%
Data Input
0V
0V
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
VCC
Input
50%
50%
0V
tPHL
tPLH
In-Phase
Output
50% VCC
VOH
50% VCC
VOL
50% VCC
VOH
50% VCC
VOL
VCC
Output
Waveform 2
S1 at GND
(see Note B)
50%
50%
0V
tPZL
[ VCC
tPLZ
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPLH
tPHL
Out-of-Phase
Output
Output
Control
(low-level
enabling)
50% VCC
VOL
tPHZ
tPZH
VOLTAGE WAVEFORMS
20% VCC
50% VCC
80% VCC
VOH
[0V
VOLTAGE WAVEFORMS
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 ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
6
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Copyright  1998, Texas Instruments Incorporated