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PI74FCT2841T

Fast CMOS Bus Interface Latches

Pericom Semiconductor 

PI74FCT841T/843T/845T

(25Ω SERIES) P174FCT2841T

BUS INTERFACE LATCHES 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122

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)

IC

Total Power Supply

Current(6)

Test Conditions(1)

VCC = Max.

VCC = Max.

VIN = GND

or VCC

VIN = 3.4V(3)

VCC = Max.,

Outputs Open

OE = GND; LE = Vcc

One Input Toggling

50% Duty Cycle

VCC = Max.,

Outputs Open

fCP = 10 MHZ

50% Duty Cycle

OE = GND; LE = Vcc

fI = 5 MHZ

One Bit Toggling

VCC = Max.,

Outputs Open

fCP = 10 MHZ

50% Duty Cycle

OE = GND; LE = Vcc

Eight Bits Toggling

fI = 2.5 MHZ

50% Duty Cycle

VIN = VCC

VIN = GND

VIN = VCC

VIN = GND

VIN = 3.4V

VIN = GND

VIN = VCC

VIN = GND

VIN = 3.4V

VIN = GND

Min. Typ(2) Max. Units

0.1 500 µA

0.5 2.0 mA

0.15 0.25 mA/

MHz

1.5 3.5(5) mA

1.8 4.5(5)

3.0 6.0(5)

5.0 14.0(5)

Notes:

1. For conditions shown as Max. or Min., 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

PS2025A 03/11/96

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