SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
FEATURES
•
•
•
•
•
•
Member of the Texas Instruments Widebus™
Family
EPIC™ (Enhanced-Performance Implanted
CMOS) Submicron Process
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Thin Very
Small-Outline (DGV) Packages
SCES052E – JULY 1995 – REVISED AUGUST 2004
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
OE
Q1
Q2
GND
Q3
Q4
VCC
Q5
Q6
Q7
GND
Q8
Q9
Q10
Q11
Q12
Q13
GND
Q14
Q15
Q16
VCC
Q17
Q18
GND
Q19
Q20
NC
DESCRIPTION
This 20-bit flip-flop is designed specifically for 1.65-V
to 3.6-V VCC operation.
The 20 flip-flops of the SN74ALVCH16721 are
edge-triggered D-type flip-flops with qualified clock
storage. On the positive transition of the clock (CLK)
input, the device provides true data at the Q outputs if
the clock-enable (CLKEN) input is low. If CLKEN is
high, no data is stored.
A buffered output-enable (OE) input places the 20
outputs in either a normal logic state (high or low) or
the high-impedance state. In the high-impedance
state, the outputs neither load nor drive the bus lines
significantly. The high-impedance state and increased
drive provide the capability to drive bus lines without
need for interface or pullup components. OE does not
affect the internal operation of the flip-flops. Old data
can be retained or new data can be entered while the
outputs are in the high-impedance state.
1
56
2
55
3
54
4
53
5
52
6
51
7
50
8
49
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
25
32
26
31
27
30
28
29
CLK
D1
D2
GND
D3
D4
VCC
D5
D6
D7
GND
D8
D9
D10
D11
D12
D13
GND
D14
D15
D16
VCC
D17
D18
GND
D19
D20
CLKEN
NC − No internal connection
To 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 SN74ALVCH16721 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.
Widebus, EPIC are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1995–2004, Texas Instruments Incorporated
SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
SCES052E – JULY 1995 – REVISED AUGUST 2004
FUNCTION TABLE
(each flip-flop)
INPUTS
D
OUTPUT
Q
X
X
Q0
↑
H
H
L
↑
L
L
L
L
L or H
X
Q0
H
X
X
X
Z
OE
CLKEN
CLK
L
H
L
L
L
LOGIC DIAGRAM (POSITIVE LOGIC)
1
OE
56
CLK
29
CE
CLKEN
C1
D1
55
1D
To 19 Other Channels
2
2
Q1
SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
SCES052E – JULY 1995 – REVISED AUGUST 2004
ABSOLUTE MAXIMUM RATINGS (1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
VCC
Supply voltage range
-0.5
4.6
V
VI
Input voltage range (2)
-0.5
4.6
V
VO
Output voltage range (2) (3)
-0.5
VCC + 0.5
IIK
Input clamp current
VI < 0
IOK
Output clamp current
VO < 0
IO
Continuous output current
Continuous current through each VCC or GND
θJA
Package thermal impedance (4)
Tstg
(1)
(2)
(3)
(4)
mA
-50
mA
±50
mA
±100
mA
DGG package
81
DGV package
86
DL package
74
Storage temperature range
-65
V
-50
150
°C/W
°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.
The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
This value is limited to 4.6 V maximum.
The package thermal impedance is calculated in accordance with JESD 51.
RECOMMENDED OPERATING CONDITIONS (1)
VCC
Supply voltage
VCC = 1.65 V to 1.95 V
VIH
High-level input voltage
MIN
MAX
1.65
3.6
UNIT
V
0.65 × VCC
VCC = 2.3 V to 2.7 V
1.7
VCC = 2.7 V to 3.6 V
2
V
0.35 × VCC
VCC = 1.65 V to 1.95 V
VIL
Low-level input voltage
VCC = 2.3 V to 2.7 V
0.7
VI
Input voltage
0
VCC
V
VO
Output voltage
0
VCC
V
VCC= 2.7 V to 3.6 V
IOH
High-level output current
IOL
Low-level output current
∆t/∆v
Input transition rise or fall rate
TA
Operating free-air temperature
(1)
V
0.8
VCC = 1.65 V
-4
VCC = 2.3 V
-12
VCC = 2.7 V
-12
VCC = 3 V
-24
VCC = 1.65 V
4
VCC = 2.3 V
12
VCC = 2.7 V
12
VCC = 3 V
24
-40
mA
mA
10
ns/V
85
°C
All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
3
SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
SCES052E – JULY 1995 – REVISED AUGUST 2004
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
IOH = -100 µA
1.65 V
IOH = -6 mA
2.3 V
2
2.3 V
1.7
2.7 V
2.2
3V
2.4
IOH = -24 mA
3V
2
IOL = 100 µA
IOH = -12 mA
0.2
1.65 V
0.45
IOL = 6 mA
2.3 V
0.4
2.3 V
0.7
2.7 V
0.4
3V
0.55
3.6 V
VI = 0.58 V
1.65 V
25
VI = 1.07 V
1.65 V
-25
VI = 0.7 V
2.3 V
45
VI = 1.7 V
2.3 V
-45
VI = 0.8 V
3V
75
3V
-75
VI = 0 to 3.6
V (2)
IOZ
VO = VCC or GND
ICC
VI = VCC or GND,
IO = 0
∆ICC
One input at VCC - 0.6 V,
Other inputs at VCC or GND
Control inputs
Data inputs
Co
(1)
(2)
Outputs
±5
VI = VCC or GND
VI = 2 V
Ci
V
1.65 V to 3.6 V
IOL = 24 mA
II(hold)
UNIT
1.2
IOL = 4 mA
IOL = 12 mA
II
TYP (1) MAX
1.65 V to 3.6 V VCC - 0.2
IOH = -4 mA
VOH
VOL
MIN
V
µA
µA
3.6 V
±500
3.6 V
±10
µA
3.6 V
40
µA
3 V to 3.6 V
750
µA
VI = VCC or GND
3.3 V
VO = VCC or GND
3.3 V
3.5
pF
6
7
pF
All typical values are at VCC = 3.3 V, TA = 25°C.
This is the bus-hold maximum dynamic current. It is the minimum overdrive current required to switch the input from one state to
another.
TIMING REQUIREMENTS
over recommended operating free-air temperature range (unless otherwise noted) (see Figures 1 through 3)
VCC = 1.8 V
MIN
fclock
tw
th
Hold time
(1)
4
MAX
VCC = 2.7 V
MIN
150
MAX
VCC = 3.3 V
± 0.3 V
MIN
150
3.3
3.3
3.3
Data before CLK↑
(1)
4
3.6
3.1
CLKEN before CLK↑
(1)
3.4
3.1
2.7
Data after CLK↑
(1)
0
0
0
CLKEN after CLK↑
(1)
0
0
0
This information was not available at the time of publication.
UNIT
MAX
150
(1)
Pulse duration, CLK high or low
Setup time
MIN
(1)
Clock frequency
tsu
MAX
VCC = 2.5 V
± 0.2 V
MHz
ns
ns
ns
SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
SCES052E – JULY 1995 – REVISED AUGUST 2004
SWITCHING CHARACTERISTICS
over recommended operating free-air temperature range (unless otherwise noted)
FROM
(INPUT)
PARAMETER
TO
(OUTPUT)
MIN
MAX
(1)
fmax
tpd
(1)
VCC = 1.8 V
CLK
VCC = 2.5 V
± 0.2 V
MIN
MAX
150
VCC = 2.7 V
MIN
MAX
150
VCC = 3.3 V
± 0.3 V
MIN
UNIT
MAX
150
MHz
Q
(1)
1
5.6
1
5.1
1
4.3
ns
1
6.1
1
5.8
1
4.8
ns
1
5.5
1
4.7
1
4.4
ns
ten
OE
Q
(1)
tdis
OE
Q
(1)
This information was not available at the time of publication.
OPERATING CHARACTERISTICS
TA = 25°C
PARAMETER
Cpd
(1)
Power dissipation
capacitance
Outputs enabled
Outputs disabled
TEST CONDITIONS
CL = 50 pF,
f = 10 MHz
VCC = 1.8 V
VCC = 2.5 V
VCC = 3.3 V
TYP
TYP
TYP
(1)
55
59
(1)
46
49
UNIT
pF
This information was not available at the time of publication.
5
SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
SCES052E – JULY 1995 – REVISED AUGUST 2004
PARAMETER MEASUREMENT INFORMATION
VCC = 1.8 V
2 × VCC
S1
1 kΩ
From Output
Under Test
Open
TEST
tpd
tPLZ/tPZL
tPHZ/tPZH
GND
CL = 30 pF
(see Note A)
1 kΩ
S1
Open
2 × VCC
GND
LOAD CIRCUIT
tw
VCC
Timing
Input
VCC/2
VCC/2
VCC/2
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC/2
VCC/2
0V
tPLH
Output
Control
(low-level
enabling)
VCC/2
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
tPLZ
VCC
VCC/2
tPZH
VOH
VCC/2
0V
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPHL
VCC/2
VCC
VCC/2
tPZL
VCC
Input
VOLTAGE WAVEFORMS
PULSE DURATION
th
VCC
Data
Input
VCC/2
0V
0V
tsu
Output
VCC
VCC/2
Input
Output
Waveform 2
S1 at GND
(see Note B)
VOL + 0.15 V
VOL
tPHZ
VCC/2
VOH
VOH − 0.15 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
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 ns, tf ≤ 2 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
6
SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
SCES052E – JULY 1995 – REVISED AUGUST 2004
PARAMETER MEASUREMENT INFORMATION
VCC = 2.5 V ± 0.2 V
2 × VCC
S1
500 Ω
From Output
Under Test
Open
TEST
tpd
tPLZ/tPZL
tPHZ/tPZH
GND
CL = 30 pF
(see Note A)
500 Ω
S1
Open
2 × VCC
GND
LOAD CIRCUIT
tw
VCC
Timing
Input
VCC/2
VCC/2
VCC/2
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC/2
VCC/2
0V
tPLH
Output
Control
(low-level
enabling)
VCC/2
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
tPLZ
VCC
VCC/2
tPZH
VOH
VCC/2
0V
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPHL
VCC/2
VCC
VCC/2
tPZL
VCC
Input
VOLTAGE WAVEFORMS
PULSE DURATION
th
VCC
Data
Input
VCC/2
0V
0V
tsu
Output
VCC
VCC/2
Input
Output
Waveform 2
S1 at GND
(see Note B)
VOL + 0.15 V
VOL
tPHZ
VCC/2
VOH
VOH − 0.15 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
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 ns, tf ≤ 2 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 2. Load Circuit and Voltage Waveforms
7
SN74ALVCH16721
3.3-V 20-BIT FLIP-FLOP
WITH 3-STATE OUTPUTS
www.ti.com
SCES052E – JULY 1995 – REVISED AUGUST 2004
PARAMETER MEASUREMENT INFORMATION
VCC = 2.7 V AND 3.3 V ± 0.3 V
6V
S1
500 Ω
From Output
Under Test
Open
GND
CL = 50 pF
(see Note A)
500 Ω
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
6V
GND
tw
LOAD CIRCUIT
2.7 V
2.7 V
Timing
Input
Input
1.5 V
1.5 V
0V
1.5 V
0V
tsu
VOLTAGE WAVEFORMS
PULSE DURATION
th
2.7 V
Data
Input
1.5 V
1.5 V
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Output
Control
(low-level
enabling)
2.7 V
1.5 V
0V
tPZL
2.7 V
Input
1.5 V
1.5 V
0V
tPLH
1.5 V
1.5 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
tPLZ
3V
1.5 V
VOL + 0.3 V
VOL
tPZH
VOH
Output
Output
Waveform 1
S1 at 6 V
(see Note B)
tPHL
1.5 V
Output
Waveform 2
S1 at GND
(see Note B)
tPHZ
VOH
1.5 V
VOH − 0.3 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
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. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 3. Load Circuit and Voltage Waveforms
8
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
(3)
Device Marking
(4/5)
(6)
SN74ALVCH16721DGGR
ACTIVE
TSSOP
DGG
56
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVCH16721
SN74ALVCH16721DL
ACTIVE
SSOP
DL
56
20
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVCH16721
SN74ALVCH16721DLR
ACTIVE
SSOP
DL
56
1000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVCH16721
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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