ECAD Просмотр технического описания (PDF) - Pericom Semiconductor

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ECAD

High-Speed CMOS Presettable Synchronous 4-Bit Binary Counters

Pericom Semiconductor 

PI74FCT193

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High-Speed CMOS Presettable Synchronous

4-Bit Binary Counters

Power Supply Characteristics

Parameters Description

ICC

Quiescent Power

Supply Current

∆ICC

Supply Current per

Input @ TTL HIGH

ICCD

Supply Current per

Input per MHz(4)

Test Conditions(1)

VCC = Max.

Freq = 0

VCC = Max.

Freq = 0

VIN = GND = VCC

VIN = 3.4V(3)

VCC = Max.,

Outputs Open

and Enabled

One Bit Toggling

50% Duty Cycle, other

input at GND or VCC

VIN = VCC

VIN = GND

Min. Typ.(2) Max. Units

0.1 500 µA

0.5 2.0 mA

0.15 0.25 mA/

MHz

Notes:

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

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.

4

PS2085E 09/14/99

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