PI74FCT377TTSSOP datasheet(3/3 Pages) PERICOM

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PI74FCT377T

OCTAL D FLIP-FLOP with CLOCK ENABLE

PS2017A 03/11/96

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Switching Characteristics over Operating Range

377T

377AT

377CT

377DT

Com.

Parameters

Description

Conditions(1)

Min

Max

Min

Max

Min

Max

Min

Max

Unit

tPLH

Propagation Delay

CL = 50 pF

2.0

13.0

2.0

7.2

2.0

5.2

2.0

4.5

tPHL

CP to ON

RL = 500

Ω

tSU

Setup Time, HIGH or LOW

2.5

—

2.0

—

2.0

—

2.0

—

Dn to CP

Hold Time, HIGH or LOW

2.0

—

1.5

—

1.5

—

1.5

—

Dn to CP

tSU

Setup Time HIGH or LOW

4.0

—

3.5

—

3.5

—

2.0

—

CE to CP

Hold Time HIGH or LOW

1.5

—

1.5

—

1.5

—

1.5

—

CE to CP

Clock Pulse Width(3)

7.0

—

6.0

—

6.0

—

3.0

—

HIGH or LOW

Notes:

1. See test circuit and wave forms.

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

3. This parameter guaranteed but not production tested.

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.)

Power Supply Characteristics

Parameters Description

Test Conditions

(1)

Min.

Typ

(2)

Max.

Units

ICC

Quiescent Power

VCC = Max.

VIN = GND

0.1

500

µA

Supply Current

or VCC

∆ICC

Supply Current per

VCC = Max.

VIN = 3.4V(3)

0.5

2.0

Input @ TTL HIGH

ICCD

Supply Current per

VCC = Max., Outputs Open

VIN = VCC

0.15

0.25

mA/

Input per MHz(4)

CE = GND

VIN = GND

MHz

One Input Toggling

50% Duty Cycle

Total Power Supply

VCC = Max., Outputs Open

VIN = VCC

1.57

3.5(5)

Current(6)

fCP = 10 MHZ, 50% Duty Cycle

VIN = GND

CE = GND

VIN = 3.4V

50% Duty Cycle

VIN = GND

2.0

5.5(5)

One Bit toggling at fI = 5 MHZ

VCC = Max., Outputs Open

VIN = VCC

3.8

7.3(5)

fCP = 10 MHZ, 50% Duty Cycle

VIN = GND

CE = GND

VIN = 3.4V

Eight Bits toggling at fI = 2.5 MHZ VIN = GND

6.0

16.3(5)

50% Duty Cycle

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