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IDTQS3389Q

QUICKSWITCH® PRODUCTS LAST VALUE LATCH 20 ACTIVE BUS TERMINATORS (BUS HOLD)

Integrated Device Technology 

IDTQS3389

LAST VALUE LATCH 20 ACTIVE TERMINATORS (BUS HOLD)

COMMERCIAL TEMPERATURE RANGE

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:

Commercial: TA = 0°C to +70°C, VCC = 5V ± 5%

Symbol

Parameter

Test Conditions

Min. Typ.(1) Max. Unit

VIH

Input HIGH Voltage

Guaranteed Logic HIGH for Control Pins

2

—

—

V

VIL

Input LOW Voltage

Guaranteed Logic LOW for Control Pins

VT

Threshold Voltage

IIN

Input Leakage Current (2)

VIN = Vcc or GND

IBH

Input Current (5)

Vcc = Max., VIN = 0V or Vcc

Input HIGH or LOW Bus Hold Inputs (2,3)

Vcc = Max., 0.8V < VIN < 2V

IBHH

Bus Hold Sustaining Current (6,7)

Vcc = Min., VIN = 2V

IBHL

Bus Hold Inputs

Vcc = Min., VIN = 0.8V

RT

Terminator Resistance

—

— 0.8 V

—

1.5 —

V

—

— ±5 µA

—

— ±20 µA

—

— ±500(4)

–60 — — µA

+60 — — µA

—

7k — Ω

NOTES:

1. Typical values are at VCC = 5.0V, TA = 25°C.

2. Trip current definition (see Functional Block Diagram):

An external driver must source at least ITL to switch the node from LOW to HIGH.

An external driver must sink at least ITH to switch the node from HIGH to LOW.

3. Hold current definition (see Functional Block Diagram):

IHH is the Maximum Curent the QS3389 can sink without raising the node above VIL max.

IHL is the Maximum Curent the QS3389 can source without lowering the node below VIH min.

4. An external driver must provide at least IBH during transition to guarantee that the Bus-Hold input will change states.

5. IBH is the magnitude of the input current specified under two conditions:

a) Input voltage at GND or Vcc. This indicates the input current under steady-state condition.

b) Input voltage between 0.8V and 2V (TTL input threshold range). This indicates the maximum input current during transient condition. The driver connected to the

input must overcome this current requirement in order to switch the logic state of the bus-hold circuit.

6. IBHL is the minimum sustaining “sink” current at the input for VIN = 0.8V. This parameter signifies the latching capability of the bus-hold circuit in logic LOW state.

7. IBHH is the minimum sustaining “source” current at the input for VIN = 2V. This parameter signifies the latching capability of the bus-hold circuit in logic HIGH state.

POWER SUPPLY CHARACTERISTICS

Symbol

Parameter

Test Conditions(1)

ICCQ Quiescent Power Supply Current

VCC = Max., VIN = GND or VCC, f = 0

NOTE:

1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.

Max.

Unit

1.5

mA

3

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