ST 74LVC374A User Manual

ST 74LVC374A User Manual

74LVC374A

OCTAL D-TYPE FLIP-FLOP HIGH PERFORMANCE

5V TOLERANT INPUTS

HIGH SPEED: tPD = 6.8ns (MAX.) at VCC = 3V

POWER DOWN PROTECTION ON INPUTS AND OUTPUTS

SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) at VCC = 3V

PCI BUS LEVELS GUARANTEED AT 24 mA

BALANCED PROPAGATION DELAYS: tPLH tPHL

OPERATING VOLTAGE RANGE:

VCC(OPR) = 1.65V to 3.6V (1.2V Data Retention)

PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 374

LATCH-UP PERFORMANCE EXCEEDS 500mA (JESD 17)

ESD PERFORMANCE:

HBM > 2000V (MIL STD 883 method 3015); MM > 200V

DESCRIPTION

The 74LVC374A is an advanced high-speed CMOS OCTAL D-TYPE FLIP FLOP with 3 STATE OUTPUTS NON INVERTING fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.

These 8 bit D-Type latch are controlled by a clock input (CK) and an output enable input (OE).

On the positive transition of the clock, the Q outputs will be set to the logic state that were setup at the D inputs.

Figure 1: Pin Connection And IEC Logic Symbols

SOP TSSOP

Table 1: Order Codes

PACKAGE

T & R

 

 

SOP

74LVC374AMTR

 

 

TSSOP

74LVC374ATTR

 

 

While the (OE) input is low, the 8 outputs will be in a normal logic state (high or low logic level) and while high level the outputs will be in a high impedance state.

The Output control does not affect the internal operation of flip flops; that is, the old data can be retained or the new data can be entered even while the outputs are off. 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 discharge, giving them 2KV ESD immunity and transient excess voltage.

July 2004

Rev. 2

1/14

 

 

74LVC374A

Figure 2: Input And Output Equivalent Circuit

Table 2: Pin Description

PIN N°

SYMBOL

NAME AND FUNCTION

 

 

 

 

1

 

OE

 

3 State Output Enable Input (Active LOW)

 

 

 

2, 5, 6, 9, 12, 15, 16,19

Q0 to Q7

3-State Outputs

 

 

 

3, 4, 7, 8, 13, 14, 17, 18

D0 to D7

Data Inputs

 

 

 

 

11

 

CK

Clock

 

 

 

10

GND

Ground (0V)

 

 

 

20

VCC

Positive Supply Voltage

Table 3: Truth Table

 

 

 

 

 

 

 

INPUTS

 

OUTPUT

 

 

 

 

 

 

 

 

 

 

OE

 

 

CK

D

Q

 

 

 

 

 

 

 

 

 

 

H

 

 

X

X

Z

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

X

NO CHANGE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

L

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

H

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X : Don’t Care

Z :High Impedance

2/14

 

 

 

74LVC374A

Table 4: Absolute Maximum Ratings

 

 

 

 

 

 

 

Symbol

Parameter

Value

Unit

 

 

 

 

VCC

Supply Voltage

-0.5 to +7.0

V

VI

DC Input Voltage

-0.5 to +7.0

V

VO

DC Output Voltage (VCC = 0V)

-0.5 to +7.0

V

VO

DC Output Voltage (High or Low State) (note 1)

-0.5 to VCC + 0.5

V

IIK

DC Input Diode Current

- 50

mA

IOK

DC Output Diode Current (note 2)

- 50

mA

IO

DC Output Current

±

50

mA

ICC or IGND

DC VCC or Ground Current per Supply Pin

±

100

mA

Tstg

Storage Temperature

-65 to +150

°C

TL

Lead Temperature (10 sec)

300

°C

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

1)IO absolute maximum rating must be observed

2)VO < GND

Table 5: Recommended Operating Conditions

Symbol

Parameter

Value

Unit

 

 

 

 

VCC

Supply Voltage (note 1)

1.65 to 3.6

V

VI

Input Voltage

0 to 5.5

V

VO

Output Voltage (VCC = 0V)

0 to 5.5

V

VO

Output Voltage (High or Low State)

0 to VCC

V

IOH, IOL

High or Low Level Output Current (VCC = 3.0 to 3.6V)

±

24

mA

IOH, IOL

High or Low Level Output Current (VCC = 2.7 to 3.0V)

±

12

mA

IOH, IOL

High or Low Level Output Current (VCC = 2.3 to 2.7V)

±

8

mA

IOH, IOL

High or Low Level Output Current (VCC = 1.65 to 2.3V)

±

4

mA

Top

Operating Temperature

-55 to 125

°C

dt/dv

Input Rise and Fall Time (note 2)

0 to 10

ns/V

 

 

 

 

 

1)Truth Table guaranteed: 1.2V to 3.6V

2)VI from 0.8V to 2V at VCC = 3.0V

3/14

74LVC374A

Table 6: DC Specifications

 

 

Test Condition

 

 

 

Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

Parameter

VCC

 

 

 

-40 to 85 °C

 

-55 to 125 °C

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(V)

 

 

 

Min.

Max.

 

Min.

 

Max.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIH

High Level Input

1.65 to 1.95

 

 

 

0.65VCC

 

 

 

0.65VCC

 

 

 

 

 

Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

 

2.3 to 2.7

 

 

 

1.7

 

 

 

1.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.7 to 3.6

 

 

 

2

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIL

Low Level Input

1.65 to 1.95

 

 

 

 

0.35VCC

 

 

0.35VCC

 

 

Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

 

2.3 to 2.7

 

 

 

 

 

 

0.7

 

 

 

 

0.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.7 to 3.6

 

 

 

 

 

 

0.8

 

 

 

 

0.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOH

High Level Output

1.65 to 3.6

IO=-100 A

VCC-0.2

 

 

 

VCC-0.2

 

 

 

 

 

Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.65

 

 

IO=-4 mA

1.2

 

 

 

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.3

 

 

IO=-8 mA

1.7

 

 

 

1.7

 

 

 

V

 

 

2.7

 

IO=-12 mA

2.2

 

 

 

2.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0

 

IO=-18 mA

2.4

 

 

 

2.4

 

 

 

 

 

 

3.0

 

IO=-24 mA

2.2

 

 

 

2.2

 

 

 

 

VOL

Low Level Output

1.65 to 3.6

IO=100 A

 

 

 

0.2

 

 

 

 

0.2

 

 

Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.65

 

 

IO=4 mA

 

0.45

 

 

0.45

 

 

 

 

 

 

 

 

 

 

 

2.3

 

 

IO=8 mA

 

 

 

0.7

 

 

 

 

0.7

V

 

 

2.7

 

IO=12 mA

 

 

 

0.4

 

 

 

 

0.4

 

 

 

3.0

 

IO=24 mA

 

0.55

 

 

0.55

 

II

Input Leakage

3.6

 

VI = 0 to 5.5V

 

 

 

± 5

 

 

 

 

± 5

A

 

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ioff

Power Off Leakage

0

 

VI or VO = 5.5V

 

 

 

10

 

 

 

 

10

A

 

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IOZ

High Impedance

3.6

 

VI = VIH or VIL

 

±

10

 

 

±

10

A

 

Output Leakage

 

 

VO = 0 to 5.5V

 

 

 

 

 

 

 

 

 

 

 

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICC

Quiescent Supply

 

 

VI = VCC or GND

 

 

 

10

 

 

 

 

10

 

 

Current

3.6

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

VI or VO = 3.6 to

 

±

10

 

 

±

10

 

 

 

 

 

 

 

 

 

 

 

5.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICC

ICC incr. per Input

2.7 to 3.6

VIH = VCC-0.6V

 

500

 

 

500

A

Table 7: Dynamic Switching Characteristics

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Condition

 

 

 

 

Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

Parameter

 

 

VCC

 

 

 

 

 

TA = 25 °C

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(V)

 

 

 

 

 

Min.

 

Typ.

 

Max.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLP

Dynamic Low Level Quiet

 

3.3

 

CL = 50pF

 

 

 

 

0.8

 

 

 

V

 

Output (note 1)

 

 

 

VIL = 0V, VIH = 3.3V

 

 

 

 

 

 

 

VOLV

 

 

 

 

 

 

-0.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1) Number of output defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is measured in the LOW state.

4/14

74LVC374A

Table 8: AC Electrical Characteristics

 

 

 

Test Condition

 

 

Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

Parameter

VCC

CL

RL

ts = tr

-40 to 85 °C

-55 to 125 °C

Unit

 

 

 

 

 

 

 

 

 

(V)

 

(pF)

()

(ns)

Min.

Max.

Min.

Max.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tPLH tPHL

Propagation Delay

1.65 to

1.95

30

1000

2.0

 

TBD

 

TBD

 

 

Time D to Q

2.3 to

2.7

30

500

2.0

 

TBD

 

TBD

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

2.7

 

50

500

2.5

1.5

7.8

1.5

9.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0 to

3.6

50

500

2.5

1

6.8

1

8.2

 

 

 

 

 

 

 

 

 

 

 

 

 

tPLH tPHL

Propagation Delay

1.65 to

1.95

30

1000

2.0

 

TBD

 

TBD

 

 

Time LE to Q

2.3 to

2.7

30

500

2.0

 

TBD

 

TBD

ns

 

 

 

 

 

 

2.7

 

50

500

2.5

1.5

7.8

1.5

9.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0 to

3.6

50

500

2.5

1

6.8

1

8.2

 

 

 

 

 

 

 

 

 

 

 

 

 

tPZL tPZH

Output Enable Time

1.65 to

1.95

30

1000

2.0

 

TBD

 

TBD

 

 

 

2.3 to

2.7

30

500

2.0

 

TBD

 

TBD

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

2.7

 

50

500

2.5

1

8.7

1

10.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0 to

3.6

50

500

2.5

1

7.7

1

9.2

 

 

 

 

 

 

 

 

 

 

 

 

 

tPLZ tPHZ

Output Disable Time

1.65 to

1.95

30

1000

2.0

 

TBD

 

TBD

 

 

 

2.3 to

2.7

30

500

2.0

 

TBD

 

TBD

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

2.7

 

50

500

2.5

2

7.6

2

9.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0 to

3.6

50

500

2.5

2

7.0

2

8.4

 

 

 

 

 

 

 

 

 

 

 

 

 

tW

LE Pulse Width

1.65 to

1.95

30

1000

2.0

TBD

 

TBD

 

 

 

HIGH

2.3 to

2.7

30

500

2.0

TBD

 

TBD

 

ns

 

 

 

 

 

 

2.7

 

50

500

2.5

3.3

 

3.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0 to

3.6

50

500

2.5

3.3

 

3.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ts

Setup Time D to LE

1.65 to

1.95

30

1000

2.0

TBD

 

TDB

 

 

 

(HIGH to LOW)

2.3 to

2.7

30

500

2.0

TBD

 

TBD

 

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

2.7

 

50

500

2.5

2

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0 to

3.6

50

500

2.5

2

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

th

Hold Time D to

1.65 to

1.95

30

1000

2.0

TBD

 

TBD

 

 

 

CLOCK, HIGH or

2.3 to

2.7

30

500

2.0

TBD

 

TBD

 

ns

 

LOW

 

 

 

 

 

 

 

 

 

 

2.7

 

50

500

2.5

1.5

 

1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0 to

3.6

50

500

2.5

1.5

 

1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tOSLH

Output To Output

2.7 to

3.6

 

 

 

 

1

 

1

ns

tOSHL

Skew Time (note1,

 

 

 

 

 

 

 

 

 

 

 

2)

 

 

 

 

 

 

 

 

 

 

1)Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn|

2)Parameter guaranteed by design

Table 9: Capacitive Characteristics

 

 

 

Test Condition

 

 

Value

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

Parameter

VCC

 

 

 

TA = 25 °C

 

Unit

 

 

(V)

 

 

Min.

 

Typ.

 

Max.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CIN

Input Capacitance

 

 

 

 

 

4

 

 

pF

CPD

Power Dissipation Capacitance

1.8

 

fIN = 10MHz

 

 

28

 

 

 

 

(note 1)

2.5

 

 

 

 

30

 

 

pF

 

 

 

 

 

 

 

 

 

 

 

 

 

3.3

 

 

 

 

34

 

 

 

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/n (per circuit)

5/14

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