IDT74FST163211 datasheet(4/6 Pages) IDT

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INDUSTRIALTEMPERATURERANGE

IDT74FST163211

24-BIT BUS SWITCH

Symbol

Parameter

Test Conditions(1)

Min.

Typ.(2)

Max.

Unit

∆ICC

Quiescent Power Supply Current

VCC = Max.

—

0.5

1.5

TTL Inputs HIGH

VIN = 3.4V(3)

ICCD

Dynamic Power Supply

VCC = Max.

VIN = VCC

—

240

320

µA/

Current(4,5)

One Enable Pin Toggling

VIN = GND

MHz/

50% Duty Cycle

Switch

Total Power Supply Current(6)

VCC = Max.

VIN = VCC

—

2.4

3.2

One Enable Pin Toggling

VIN = GND

fi = 10MHz

VIN = 3.4V

—

2.7

50% Duty Cycle

VIN = GND

VCC = Max.

VIN = VCC

—

4.8

6.4

Two Enable Pins Toggling

VIN = GND

fi = 10MHz

VIN = 3.4V

—

5.4

50% Duty Cycle

VIN = GND

POWER SUPPLY CHARACTERISTICS

NOTES:

1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. TA = –40°C to +85°C

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. Switch inputs do not contribute to

∆ICC.

4. This parameter represents the current required to switch the internal capacitance of the control inputs at the specified frequency.

Switch inputs generate no significant power supply currents as they transition. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.

5. CPD = ICCD/VCC

CPD = Power Dissipation Capacitance

6. IC = IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC +

∆ICC DHNT + ICCD (fiN)

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)

fi = Control Input Frequency

N = Number of Control Inputs Toggling at fi

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

FollowingConditionsApplyUnlessOtherwiseSpecified:

Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 10%

VCC = 5V ± 10%

VCC = 4V

Symbol

Description(1)

Min.

Typ.

Max.

Unit

tPLH

DataPropagationDelay

—

0.25

tPHL

A to B, B to A(2)

tPZH

Switch CONNECT Delay

1.5

—

6.5

tPZL

xOE to A or B

tPHZ

Switch DISCONNECT Delay

1.5

—

5.5

tPLZ

xOE to A or B

|QCI|

Charge Injection During Switch DISCONNECT

—

1.5

—

xOE to A or B(3)

NOTES:

1. See test circuits and waveforms.

2. The bus switch contributes no Propagation Delay other than the RC Delay of the load interacting with the RC of the switch.

3. |QCI| is the charge injection for a single switch DISCONNECT and applies to either single switches or multiplexers. |QDCI| is the charge injection for a multiplexer as

the multiplexed port switches from one path to another. Charge injection is reduced because the injection from the DISCONNECT of the first path is compensated by

the CONNECT of the second path.

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