ST 74VHC27 User Manual

74VHC27

TRIPLE 3-INPUT NOR GATE

■ HIGH SPEED: t

■ LOW POWER DISSIPATION:

I

= 2 µA (MAX.) at TA=25°C

CC

■ HIGH NOISE IMMUNITY:

V

= V

NIH

■ POWER DOWN PROTECTION ON INPUTS

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

OH

■ BALANCED PROPAGATION DELAYS:

t

PLH

■ OPERATING VOLTAGE RANGE:

V

CC

■ PIN AND FUNCTION COMPATIBLE WITH

NIL

| = IOL = 8mA (MIN)

≅ t

PHL

(OPR) = 2V to 5.5V

= 4.1 ns (TYP.) at VCC = 5V

PD

= 28% VCC (MIN.)

74 SERIES 27

■ IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74VHC27 is an advanced high-speed CMOS TRIPLE 3-INPUT NOR GATE fabricated with sub-micron silicon gate and double-layer metal wiring C

2

MOS technology. The internal circuit is composed of 3 stages including buffer ou tput, whi ch provid es hig h no ise immunity and stable output.

TSSOPSOP

Table 1: Order Codes

PACKAGE T & R

SOP 74VHC27MTR

TSSOP 74VHC27TTR

Power down protection is provided on all inputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V. All inputs and outputs are equipped with protection circuits against static disc harge, giving them 2KV ESD immunity and transient excess voltage.

Figure 1: Pin Connection And IEC Logic Symbols

Rev. 4

1/10November 2004

74VHC27

Figure 2: Input Equivalent Circuit Table 2: Pin Description

PIN N° SYMBOL NAME AND FUNCTION

1, 3, 9 1A to 3A Data Inputs

2, 4, 10 1B to 3B Data Inputs

13, 5, 11 1C to 3C Data Inputs

12, 6, 8 1Y to 3Y Data Outputs

7 GND Ground (0V)

14

Table 3: Truth Table

ABCY

LLLH HXXL XHXL XXHL

X : Don‘t Care

Table 4: Absolute Maximum Ratings

Symbol Parameter Value Unit

V

I

OK

I

or I

I

CC

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied

Supply Voltage

CC

DC Input Voltage

I

DC Output Voltage -0.5 to VCC + 0.5

O

DC Input Diode Current

IK

DC Output Diode Current DC Output Current

O

DC VCC or Ground Current

GND

Storage Temperature

stg

Lead Temperature (10 sec)

L

Table 5: Recommended Operating Conditions

V

CC

Positive Supply Voltage

-0.5 to +7.0 V

- 20 mA

± 20 mA ± 25 mA ± 50 mA

-65 to +150 °C 300 °C

V

Symbol Parameter Value Unit

V

V V T

dt/dv

1) VIN from 30 % t o 70% of V

Supply Voltage

CC

Input Voltage

I

Output Voltage 0 to V

O

Operating Temperature

op

Input Rise and Fall Time (note 1) (V (V

CC

= 3.3 ± 0.3V)

CC

= 5.0 ± 0.5V)

CC

2 to 5.5 V 0 to 5.5 V

CC

-55 to 125 °C 0 to 100

0 to 20

2/10

V

ns/V

Table 6: DC Specifications

Symbol Parameter

V

High Level Input

IH

Voltage

V

Low Level Input

IL

Voltage

High Level Output

OH

Voltage

Low Level Output

OL

Voltage

I

Input Leakage

I

Current

I

Quiescent Supply

CC

Current

V

(V)

2.0 1.5 1.5 1.5

3.0 to

5.5

2.0 0.5 0.5 0.5

3.0 to

5.5

2.0

3.0

4.5

3.0

4.5

2.0

3.0

4.5

3.0

4.5

0 to

5.5

Test Condition Value

= 25°C

T

CC

A

Min. Typ. Max. Min. Max. Min. Max.

0.7V

CC

0.3V

CC

IO=-50 µA I

=-50 µA

O

=-50 µA

I

O

=-4 mA

I

O

=-8 mA

I

O

IO=50 µA

=50 µA

I

O

=50 µA

I

O

=4 mA

I

O

=8 mA

I

O

VI = 5.5V or GND

= VCC or GND

V

I

1.9 2.0 1.9 1.9

2.9 3.0 2.9 2.9

4.4 4.5 4.4 4.4

2.58 2.48 2.4

3.94 3.8 3.7

0.0 0.1 0.1 0.1

0.36 0.44 0.55

± 0.1 ± 1 ± 1 µA

22020µA

74VHC27

-40 to 85°C -55 to 125°C

0.7V

CC

0.3V

CC

0.7V

CC

0.3V

CC

Unit

V

Table 7: AC Electrical Characteristics (Input t

Test Condition Value

Symbol Parameter

t

Propagation Delay

PLH PHL

Time

0.5V

t

(*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5.0V ±

V

3.3

5.0

C

CC

(V)

L

(pF)

(*)

15 6.2 8.8 1.0 10.5 1.0 10.5

(*)

50 8.7 12.3 1.0 14.0 1.0 14.0

(**)

15 4.1 5.9 1.0 7.0 1.0 7.0

(**)

50 5.6 7.9 1.0 9.0 1.0 9.0

= tf = 3ns)

r

= 25°C

T

A

-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

Unit

ns

3/10