US5C3257L-S16-R datasheet(5/6 Pages) UTC

5 / 6 page

US5C3257

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 6

www.unisonic.com.tw

QW-R502-891.a

POWER SUPPLY CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITIONS (Note 1)

MIN

TYP

(Note 2)

MAX

UNIT

Quiescent Power Supply Current

ICC

VCC=Max., VIN=GND or VCC

0.1

3.0

µA

Supply Current per Input @ TTL

HIGH

∆ICC

VCC=Max., VIN=3.4V (Note 3)

2.5

Supply Current per Input per MHz

(Note 4)

ICCD

VCC=Max., I and Y Pins Open

=GND, Control Input Toggling

50% Duty Cycle

0.25

mA/

MHz

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

applicable device type.

2. Typical values are at VCC=5.0V, TA=25°C ambient and maximum loading.

3. Per TTL driven input (VIN=3.4V, control inputs only); I and Y pins do not contribute to ICC.

4. This current applies to the control inputs only and represent the current required to switch internal

capacitance at the specified frequency. The I and Y inputs generate no significant AC or DC currents as

they transition. This parameter is not tested, but is guaranteed by design.

SWITCHING CHARACTERISTICS OVER OPERATIONG RANGE

PARAMETER

SYMBOL

TEST CONDITIONS (Note 1)

MIN

TYP

MAX

UNIT

Propagation Delay In to Yn

(Note 2, 3)

tIY

CL=50pF, RL=500Ω

0.25

Bus Select Time Sn to Yn

tSY

0.5

5.2

Bus Disable Time E to Yn

tPZH / tPZL

0.5

4.8

Bus Disable Time E to Yn

tPHZ / tPLZ

0.5

5.0

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