IDT74FCT623TPB datasheet(4/6 Pages) IDT

4 / 6 page

MILITARY AND COMMERCIAL TEMPERATURE RANGES

IDT54/74FCT623T/AT/CT

FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)

6.19

POWER SUPPLY CHARACTERISTICS

NOTES:

1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.

2. Typical values are at VCC = 5.0V, +25

°C ambient.

3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND.

4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.

5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.

6. IC = IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC +

∆ICC DHNT + ICCD (fCP/2 + fiNi)

ICC = Quiescent Current

∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)

DH = Duty Cycle for TTL Inputs High

NT = Number of TTL Inputs at DH

ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)

fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)

fi = Input Frequency

Ni = Number of Inputs at fi

All currents are in milliamps and all frequencies are in megahertz.

2563 tbl 07

Symbol

Parameter

Test Conditions(1)

Min.

Typ.(2)

Max.

Unit

∆ICC

Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.

VIN = 3.4V(3)

—

0.5

2.0

ICCD

Dynamic Power Supply

Current(4)

VCC = Max.

Outputs Open

GBA = GAB = GND

One Input Toggling

50% Duty Cycle

VIN = VCC

VIN = GND

—

0.15

0.25

mA/

MHz

Total Power Supply Current(6)

VCC = Max.

Outputs Open

fi = 10MHz

VIN = VCC

VIN = GND

—

1.5

3.5

50% Duty Cycle

GBA = GAB = GND

One Bit Toggling

VIN = 3.4V

VIN = GND

—

1.8

4.5

VCC = Max.

Outputs Open

fi = 2.5MHz

VIN = VCC

VIN = GND

—

3.0

6.0(5)

50% Duty Cycle

GBA = GAB = GND

Eight Bits Toggling

VIN = 3.4V

VIN = GND

—

5.0

14.0(5)

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

NOTES:

2563 tbl 07

1. See test circuit and waveforms.

2. Minimum limits are guaranteed but not tested on Propagation Delays

54/74FCT623T

54/74FCT623AT

54/74FCT623CT

Com'l.

Mil.

Com'l.

Mil.

Com'l.

Mil.

Symbol

Parameter

Condition(1)

Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit

tPLH

tPHL

Propagation Delay

An to Bn

CL = 50pF

RL = 500

Ω

1.5

7.5

1.5

9.0

1.5

5.5

1.5

6.3

1.5

4.8

1.5

5.4

tPLH

tPHL

Propagation Delay

Bn to An

1.5

7.5

1.5

9.5

1.5

5.5

1.5

6.3

1.5

4.8

1.5

5.4

tPZH

tPZL

Output Enable Time

GBA to An

1.5

9.0

1.5

10.0

1.5

7.0

1.5

8.0

1.5

6.1

1.5

6.9

tPHZ

tPLZ

Output Disable Time

GBA to An

1.5

8.0

1.5

9.0

1.5

6.5

1.5

7.4

1.5

5.6

1.5

6.4

tPZH

tPZL

Output Enable Time

GAB to Bn

1.5

9.0

1.5

10.5

1.5

7.0

1.5

8.0

1.5

6.1

1.5

6.9

tPHZ

tPLZ

Output Disable Time

GAB to Bn

1.5

8.0

1.5

9.0

1.5

6.5

1.5

7.4

1.5

5.6

1.5

6.4

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