TC74VCX16721FT
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VCX16721FT
Low-Voltage 20-Bit D-Type Flip-Flop with 3.6-V Tolerant Inputs and Outputs
The TC74VCX16721FT is a high-performance CMOS 20-bit
D-type flip-flop. Designed for use in 1.8-V, 2.5-V or 3.3-V systems,
it achieves high-speed operation while maintaining the CMOS
low power dissipation.
It is also designed with overvoltage tolerant inputs and outputs
up to 3.6 V.
The TC74VCX16721FT is edge-triggered D-type flip-flop with
qualified clock storage. On the positive transition of the clock
(CK) input, the device provides true data at the Q outputs if the
clock-enable (CKEN) input is low. If CKEN is high, no data is
Weight: 0.25 g (typ.)
stored. When the OE input is high, the outputs are in a
high-impedance state. This device is designed to be used with
3-state memory address drivers, etc.
All inputs are equipped with protection circuits against static discharge.
Features
•
•
Low-voltage operation: V
CC
= 1.8 to 3.6 V
High-speed operation: t
pd
= 3.5 ns (max) (V
CC
= 3.0 to 3.6 V)
: t
pd
= 4.4 ns (max) (V
CC
= 2.3 to 2.7 V)
: t
pd
= 8.8 ns (max) (V
CC
= 1.8 V)
•
Output current : I
OH
/I
OL
= ±24 mA (min) (V
CC
= 3.0 V)
: I
OH
/I
OL
= ±18 mA (min) (V
CC
= 2.3 V)
: I
OH
/I
OL
= ±6 mA (min) (V
CC
= 1.8 V)
•
•
•
•
Latch-up performance:
−300
mA
ESD performance: Machine model
≥ ±200
V
Human body model
≥ ±2000
V
Package: TSSOP
3.6-V tolerant function and power-down protection provided on all inputs and outputs
Start of commercial production
1997-11
1
2014-03-01
TC74VCX16721FT
Pin Assignment
(top view)
IEC Logic Symbol
OE
Q1
Q2
GND
Q3
Q4
V
CC
Q5
Q6
1
2
3
4
5
6
7
8
9
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
CK
D1
1OE
1
56
29
55
54
52
51
49
48
47
45
44
43
42
41
40
38
37
36
34
33
31
30
EN2
C1
1C
1D
2
3
5
6
8
9
10
12
13
14
15
16
17
19
20
21
23
24
26
27
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
Q13
Q14
Q15
Q16
Q17
Q18
Q19
Q20
CK
D2
GND
D3
D4
V
CC
D5
D6
D7
GND
D8
D9
D10
D11
D12
D13
GND
D14
D15
D16
V
CC
D17
D18
GND
D19
D20
CKEN
CKEN
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
Q7 10
GND 11
Q8 12
Q9 13
Q10
14
Q11 15
Q12
Q13
16
17
41
40
39
38
37
36
35
34
33
32
31
30
29
GND 18
Q14 19
Q15
20
Q16 21
V
CC
Q17
Q18
22
23
24
GND 25
Q19 26
Q20 27
NC 28
2
2014-03-01
TC74VCX16721FT
Truth Table
(each flip-flop)
Inputs
OE
L
L
L
L
H
CKEN
H
L
L
L
X
CK
X
D
X
H
L
Outputs
Q
Q0
H
L
Q0
Z
L or H
X
X
X
X: Don’t care
Z: High impedance
Qn: No change
System Diagram
OE
CKEN
1
29
CK
D1
56
55
D
CK
Q
2
Q1
To 19 other channels
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2014-03-01
TC74VCX16721FT
Absolute Maximum Ratings (Note 1)
Characteristics
Power supply voltage
DC input voltage
DC output voltage
Input diode current
Output diode current
DC output current
Power dissipation
DC V
CC
/ground current per supply pin
Storage temperature
Symbol
V
CC
V
IN
V
OUT
I
IK
I
OK
I
OUT
P
D
I
CC
/I
GND
T
stg
Rating
−
0.5 to 4.6
−
0.5 to 4.6
−
0.5 to 4.6 (Note 2)
−
0.5 to V
CC
+
0.5
(Note 3)
−
50
±
50
±
50
Unit
V
V
V
mA
(Note 4)
mA
mA
mW
mA
°C
400
±
100
−
65 to 150
Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Note 2: OFF state
Note 3: High or low state. I
OUT
absolute maximum rating must be observed.
Note 4: V
OUT
<
GND, V
OUT
>
V
CC
Operating Ranges (Note 1)
Characteristics
Power supply voltage
Input voltage
Output voltage
Symbol
V
CC
V
IN
V
OUT
Rating
1.8 to 3.6
1.2 to 3.6 (Note 2)
−
0.3 to 3.6
Unit
V
V
V
0 to 3.6 (Note 3)
0 to V
CC
(Note 4)
±
24
(Note 5)
(Note 6)
(Note 7)
°C
(Note 8)
ns/V
mA
Output current
I
OH
/I
OL
T
opr
dt/dv
±
18
±
6
Operating temperature
Input rise and fall time
−
40 to 85
0 to 10
Note 1: The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either V
CC
or GND.
Note 2: Data retention only
Note 3: OFF state
Note 4: High or low state
Note 5: V
CC
=
3.0 to 3.6 V
Note 6: V
CC
=
2.3 to 2.7 V
Note 7: V
CC
=
1.8 V
Note 8: V
IN
=
0.8 to 2.0 V, V
CC
=
3.0 V
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2014-03-01
TC74VCX16721FT
Electrical Characteristics
DC Characteristics
(Ta
= −40
to 85°C, 2.7 V
<
V
CC
≤
3.6 V)
Characteristics
H-level
L-level
Symbol
V
IH
V
IL
Test Condition
⎯
⎯
V
CC
(V)
2.7 to 3.6
2.7 to 3.6
Min
2.0
⎯
Max
⎯
Unit
Input voltage
0.8
⎯
⎯
⎯
⎯
V
I
OH
= −
100
μ
A
H-level
V
OH
V
IN
=
V
IH
or V
IL
I
OH
= −
12 mA
I
OH
= −
18 mA
Output voltage
I
OH
= −
24 mA
I
OL
=
100
μ
A
L-level
V
OL
V
IN
=
V
IH
or V
IL
I
OL
=
12 mA
I
OL
=
18 mA
I
OL
=
24 mA
Input leakage current
3-state output OFF state current
Power-off leakage current
Quiescent supply current
Increase in I
CC
per input
I
IN
I
OZ
I
OFF
I
CC
Δ
I
CC
2.7 to 3.6
2.7
3.0
3.0
2.7 to 3.6
2.7
3.0
3.0
2.7 to 3.6
2.7 to 3.6
0
2.7 to 3.6
2.7 to 3.6
2.7 to 3.6
V
CC
−
0.2
2.2
2.4
2.2
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
V
0.2
0.4
0.4
0.55
±
5.0
±
10.0
μ
A
μ
A
μ
A
V
IN
=
0 to 3.6 V
V
IN
=
V
IH
or V
IL
V
OUT
=
0 to 3.6 V
V
IN
, V
OUT
=
0 to 3.6 V
V
IN
=
V
CC
or GND
V
CC
≤
(V
IN
, V
OUT
)
≤3.6
V
V
IH
=
V
CC
−
0.6 V
10.0
20.0
±
20.0
μ
A
750
DC Characteristics
(Ta
= −40
to 85°C, 2.3 V
≤
V
CC
≤
2.7 V)
Characteristics
H-level
L-level
Symbol
V
IH
V
IL
Test Condition
⎯
⎯
V
CC
(V)
2.3 to 2.7
2.3 to 2.7
Min
1.6
⎯
Max
⎯
Unit
Input voltage
0.7
⎯
⎯
⎯
⎯
V
I
OH
= −
100
μ
A
H-level
Output voltage
V
OH
V
IN
=
V
IH
or V
IL
I
OH
= −
6 mA
I
OH
= −
12 mA
I
OH
= −
18 mA
I
OL
=
100
μ
A
L-level
V
OL
V
IN
=
V
IH
or V
IL
I
OL
=
12 mA
I
OL
=
18 mA
Input leakage current
3-state output OFF state current
Power-off leakage current
Quiescent supply current
I
IN
I
OZ
I
OFF
I
CC
V
IN
=
0 to 3.6 V
V
IN
=
V
IH
or V
IL
V
OUT
=
0 to 3.6 V
V
IN
, V
OUT
=
0 to 3.6 V
V
IN
=
V
CC
or GND
V
CC
≤
(V
IN
, V
OUT
)
≤
3.6 V
2.3 to 2.7
2.3
2.3
2.3
2.3 to 2.7
2.3
2.3
2.3 to 2.7
2.3 to 2.7
0
2.3 to 2.7
2.3 to 2.7
V
CC
−
0.2
2.0
1.8
1.7
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
V
0.2
0.4
0.6
±
5.0
±
10.0
μ
A
μ
A
μ
A
μ
A
10.0
20.0
±
20.0
5
2014-03-01
Embedded System
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