TOSHIBA TC74VCX16827FT Technical data

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
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

Weight: 0.25 g (typ.)

TC74VCX16827FT

• Low-voltage operation: VCC = 1.8 to 3.6 V

• High-speed operation: t

: t
: tpd = 6.0 ns (max) (VCC = 1.8 V)

• Output current: I
: I
: IOH/IOL = ±6 mA (min) (VCC = 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

OH/IOL

OH/IOL

= 2.5 ns (max) (VCC = 3.0 to 3.6 V)

pd

= 3.0 ns (max) (VCC = 2.3 to 2.7 V)

pd

= ±24 mA (min) (VCC = 3.0 V)
= ±18 mA (min) (VCC = 2.3 V)

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TC74VCX16827FT

Pin Assignment

1

OE11

2

1Y1

1Y2

3

GND

4

5

1Y3

1Y4

6

V

7

CC

1Y5

8

1Y6

9

1Y7

10

GND 11

1Y8

12

13

1Y9

14

1Y10

2Y1

15

(top view)

IEC Logic Symbol

56

55

54

53

52

51

50

49

48

47

46

45

44

43

42

OE21

1A1

1A2

GND

1A3

1A4

V

CC

1A5

1A6

1A7

GND

1A8

1A9

1A10

2A1

OE11

OE21

OE12

OE22

1A1

1A2

1A3

1A4

1A5

1A6

1A7

1A8

1A9

1A10

2A1

2A2

2A3

2A4

2A5

2A6
2A7

2A8

2A9

2A10

1

56

28

29

55

54

52

51

49

48

47

45

44

43

42

41

40

38

37

36

34

33

31

30

&

EN1

&

EN2

1 1

1 2

2

1Y1

3

1Y2

5

1Y3

6

1Y4

8

1Y5

9

1Y6

10

1Y7

12

1Y8

13

1Y9

14

1Y10

15

2Y1

16

2Y2

17

2Y3

19

2Y4

20

2Y5

21

2Y6

23

2Y7

24

2Y8

26

2Y9

27

2Y10

41

40

39

38

37

36

35

34

33

32

31

30

29

2A2

2A3

GND

2A4

2A5

2A6

V

CC

2A7

2A8

GND

2A9

2A10

OE22

2Y2

2Y3

GND

2Y4

2Y5

V

CC

2Y7

2Y8

OE12

16

17

18

19

20

212Y6

22

23

24

25GND

262Y9

272Y10

28

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TC74VCX16827FT

Truth Table

OE1 OE2 A

L L L L

L L H H

H X X Z

X H X Z

(each 10-bit latch)

Input

X: Don’t care

Z: High impedance

System Diagram

OE11

OE21

1A1

1

56

55

Output

Y

2

1Y1

To nine other channels

2A1

28

29

42

15

To nine other channels

2Y1

OE12

OE22

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TC74VCX16827FT

Absolute Maximum Ratings (Note 1)

Characteristics Symbol Rating Unit

Power supply voltage V

DC input voltage V

DC output voltage V

Input diode current I

Output diode current I

DC output current I

Power dissipation P

DC VCC/ground current per supply pin ICC/I

Storage temperature T

CC

IN

OUT

IK

OK

OUT

D

GND

stg

−0.5 to 4.6 (Note 2)

−0.5 to V

±50 (Note 4) mA

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).

−0.5 to 4.6 V

−0.5 to 4.6 V

+ 0.5

CC

(Note 3)

−50 mA

±50 mA

400 mW

±100 mA

−65 to 150 °C

V

Note 2: OFF state

Note 3: High or low state. I

Note 4: V

OUT

< GND, V

absolute maximum rating must be observed.

OUT

> VCC

OUT

Operating Ranges (Note 1)

Characteristics Symbol Rating Unit

Power supply voltage V

Input voltage V

Output voltage V

Output current IOH/IOL

Operating temperature T

Input rise and fall time dt/dv 0 to 10 (Note 8) ns/V

CC

IN

OUT

opr

1.2 to 3.6 (Note 2)

0 to 3.6 (Note 3)

0 to VCC (Note 4)

±24 (Note 5)

±18 (Note 6)

1.8 to 3.6

−0.3 to 3.6 V

±6 (Note 7)

−40 to 85 °C

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

V

V

mA

Note 3: OFF state

Note 4: High or low state

Note 5: V

= 3.0 to 3.6 V

CC

Note 6: VCC = 2.3 to 2.7 V

Note 7: VCC = 1.8 V

Note 8: VIN = 0.8 to 2.0 V, VCC = 3.0 V

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