ST 74VHC14 User Manual

This is information on a product in full production.

June 2012 Doc ID 5741 Rev 8 1/16

16

74VHC14

Hex Schmitt inverter

Datasheet − production data

Features

■ High speed

–t

PD

= 5.5 ns (typ.) at V

CC

= 5 V

■ Low power dissipation

–I

CC

= 2 μA (max.) at T

A

= 25 °C

■ Typical hysteresis: V

h

= 1 V at V

CC

= 4.5 V

■ Power-down protection on inputs

– Symmetrical output impedance

|I

OH

| = I

OL

= 8 mA (min.)

■ Balanced propagation delay

–t

PLH

≅ t

PHL

■ Operating voltage range

–V

CC

(opr) = 2 V to 5.5 V

■ Pin and function compatible with 74 series 14

■ Improved latch-up immunity

■ Low noise

–V

OLP

= 0.8 V (max.)

Applications

■ Automotive

■ Industrial

■ Computer

■ Consumer

Description

The 74VHC14 is an advanced high-speed CMOS

hex Schmitt inverter manufactured with sub-

micron silicon gate and double-layer metal wiring

C

2

MOS technology.

The internal circuit is composed of 3 stages

including a buffer output, which provides high

noise immunity and stable output.

Power-down protection is provided on all inputs

and 0 to 7 V can be accepted on inputs

regardless of the supply voltage. This device can

be used to interface 5 V to 3 V.

Pin configuration and function are the same as

those of the 74VHC04 but the 74VHC14 has

hysteresis.

This along with its Schmitt trigger function allows

the device to be used on line receivers with slow

rise/fall input signals.

All inputs and outputs are equipped with

protection circuits against static discharge, giving

them 2 kV ESD immunity and transient excess

voltage.

SO-14TSSOP14

Table 1. Device summary

Part number Temperature range Package Packaging

74VHC14TTR -55/+125 °C TSSOP14 Tape and reel

74VHC14YTTR

(1)

-40/+125 °C TSSOP14 (automotive grade) Tape and reel

74VHC14MTR -55/+125 °C SO-14 Tape and reel

1. Qualification and characterization (according to AEC Q100 and Q003 or equivalent) and advanced screening (according to

AEC Q001 and Q002 or equivalent) are ongoing.

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Contents 74VHC14

2/16 Doc ID 5741 Rev 8

Contents

1 Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.3 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

74VHC14 Logic symbols and I/O equivalent circuit

Doc ID 5741 Rev 8 3/16

1 Logic symbols and I/O equivalent circuit

Figure 1. IEC logic symbols

Figure 2. Input and output equivalent circuit

Pin settings 74VHC14

4/16 Doc ID 5741 Rev 8

2 Pin settings

2.1 Pin connections

Figure 3. Pin connections (top through view)

2.2 Pin description

2.3 Truth table

Table 2. Pin description

Pin number Symbol Name and function

1, 3, 5, 9, 11, 13 1A to 6A Data inputs

2, 4, 6, 8, 10, 12 1Y to 6Y Data outputs

7 GND Ground (0 V)

14 V

CC

Positive supply voltage

Table 3. Truth table

Input Output

AY

LH

HL

74VHC14 Maximum ratings

Doc ID 5741 Rev 8 5/16

3 Maximum ratings

Stressing the device above the rating listed in the “absolute maximum ratings” table may

cause permanent damage to the device. These are stress ratings only and operation of the

device at these or any other conditions above those indicated in the operating sections of

this specification is not implied. Exposure to absolute maximum rating conditions for

extended periods may affect device reliability.

3.1 Recommended operating conditions

Table 4. Absolute maximum ratings

Symbol Parameter Value Unit

V

CC

Supply voltage -0.5 to +7.0 V

V

I

DC input voltage -0.5 to +7.0 V

V

O

DC output voltage -0.5 to V

CC

+ 0.5 V

I

IK

DC input diode current - 20 mA

I

OK

DC output diode current ± 20 mA

I

O

DC output current ± 25 mA

I

CC

DC supply current per supply pin ± 50 mA

I

GND

DC ground current per supply pin ± 50 mA

T

stg

Storage temperature -65 to +150 °C

T

L

Lead temperature (10 sec) 300 °C

Table 5. Recommended operating conditions

Symbol Parameter Value Unit

V

CC

Supply voltage 2 to 5.5 V

V

I

Input voltage 0 to 5.5 V

V

O

Output voltage 0 to V

CC

V

T

op

Operating temperature

TSSOP14, SO-14 -55 to +125 °C

TSSOP14 (automotive grade) -40 to +125 °C