TC74VCX16827FT
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VCX16827FT
Low-Voltage 20-Bit Bus Buffer with 3.6-V Tolerant Inputs and Outputs
The TC74VCX16827FT is a high-performance CMOS 20-bit bus
buffer. 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 TC74VCX16827FT is composed of two 10-bit sections with
separate output-enable signals. For either 10-bit buffer section,
the two output-enable (1OE1 and 1OE2 or 2OE1 and 2OE2)
inputs must both be low for the corresponding Y outputs to be
Weight: 0.25 g (typ.)
active. 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
= 2.5 ns (max) (V
CC
= 3.0 to 3.6 V)
: t
pd
= 3.0 ns (max) (V
CC
= 2.3 to 2.7 V)
: t
pd
= 6.0 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
1
2007-10-19
TC74VCX16827FT
Pin Assignment
(top view)
1OE1
1OE2
2OE1
2OE2
IEC Logic Symbol
1
56
28
29
55
54
52
51
49
48
47
45
44
43
42
41
40
38
37
36
34
33
31
30
1
2
&
&
1OE1
1Y1
1Y2
GND
1Y3
1Y4
V
CC
1Y5
1Y6
1
2
3
4
5
6
7
8
9
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
1OE2
1A1
1A2
GND
EN1
EN2
1
1
2
3
5
6
8
9
10
12
13
14
15
16
17
19
20
21
23
24
26
27
1Y1
1Y2
1Y3
1Y4
1Y5
1Y6
1Y7
1Y8
1Y9
1Y10
2Y1
2Y2
2Y3
2Y4
2Y5
2Y6
2Y7
2Y8
2Y9
2Y10
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1A8
1A9
1A10
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2A8
2A9
2A10
1A3
1A4
V
CC
1A5
1A6
1A7
GND
1A8
1A9
1A10
2A1
2A2
2A3
GND
2A4
2A5
2A6
V
CC
2A7
2A8
GND
2A9
2A10
2OE2
1Y7 10
GND 11
1Y8 12
1Y9 13
1Y10 14
2Y1 15
2Y2
2Y3
16
17
41
40
39
38
37
36
35
34
33
32
31
30
29
GND 18
2Y4 19
2Y5
20
2Y6 21
V
CC
2Y7
2Y8
22
23
24
GND 25
2Y9 26
2Y10 27
2OE1
28
2
2007-10-19
TC74VCX16827FT
Truth Table
(each 10-bit latch)
Input
OE1
L
L
H
X
OE2
L
L
X
H
A
L
H
X
X
Output
Y
L
H
Z
Z
X: Don’t care
Z: High impedance
System Diagram
1OE1
1OE2
1A1
1
56
55
2
1Y1
To nine other channels
2OE1
2OE2
2A1
28
29
42
15
2Y1
To nine other channels
3
2007-10-19
TC74VCX16827FT
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
Unit
V
V
V
mA
(Note 4)
mA
mA
mW
mA
°C
(Note 3)
−
50
±
50
±
50
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 VCC 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
4
2007-10-19
TC74VCX16827FT
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 (per input)
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
2007-10-19
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