CY54FCT138T, CY74FCT138T

1-OF-8 DECODERS

SCCS013B – MAY 1994 – REVISED OCTOBER 2001

4

POST OFFICE BOX 655303

recommended operating conditions (see Note 2)

CY54FCT138T

CY74FCT138T

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.75

5

5.25

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

IOH

High-level output current

–12

–32

mA

IOL

Low-level output current

32

64

mA

TA

Operating free-air temperature

–55

125

–40

85

°C

NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation.

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

CY54FCT138T

CY74FCT138T

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

IIN = –18 mA

–0.7

–1.2

V

VIK

VCC = 4.75 V,

IIN = –18 mA

–0.7

–1.2

V

VCC = 4.5 V,

IOH = –12 mA

2.4

3.3

VOH

VCC = 4 75 V

IOH = –32 mA

2

V

VCC = 4.75 V

IOH = –15 mA

2.4

3.3

VOL

VCC = 4.5 V,

IOL = 32 mA

0.3

0.55

V

VOL

VCC = 4.75 V,

IOL = 64 mA

0.3

0.55

V

Vhys

All inputs

0.2

0.2

V

II

VCC = 5.5 V,

VIN = VCC

5

µA

II

VCC = 5.25 V,

VIN = VCC

5

µA

IIH

VCC = 5.5 V,

VIN = 2.7 V

±1

µA

IIH

VCC = 5.25 V,

VIN = 2.7 V

±1

µA

IIL

VCC = 5.5 V,

VIN = 0.5 V

±1

µA

IIL

VCC = 5.25 V,

VIN = 0.5 V

±1

µA

I

‡

VCC = 5.5 V,

VOUT = 0 V

–60

–120

–225

mA

IOS‡

VCC = 5.25 V,

VOUT = 0 V

–60

–120

–225

mA

Ioff

VCC = 0 V,

VOUT = 4.5 V

±1

±1

µA

ICC

VCC = 5.5 V,

VIN ≤ 0.2 V,

VIN ≥ VCC – 0.2 V

0.1

0.2

mA

ICC

VCC = 5.25 V,

VIN ≤ 0.2 V,

VIN ≥ VCC – 0.2 V

0.1

0.2

mA

∆ICC

VCC = 5.5 V, VIN = 3.4 V§, f1 = 0, Outputs open

0.5

2

mA

∆ICC

VCC = 5.25 V, VIN = 3.4 V§, f1 = 0, Outputs open

0.5

2

mA

ICCD¶

VCC = 5.5 V, Outputs open, One bit switching at 50% duty

cycle, VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V

0.06

0.12

mA/

ICCD¶

VCC = 5.25 V, Outputs open, One bit switching at 50%

duty cycle, VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V

0.06

0.12

MHz

† Typical values are at VCC = 5 V, TA = 25°C.

‡ Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus

and/or sample-and-hold techniques are preferable to minimize internal chip heating and more accurately reflect operational values. Otherwise,

prolonged shorting of a high output can raise the chip temperature well above normal and cause invalid readings in other parametric tests. In

any sequence of parameter tests, IOS tests should be performed last.

§ Per TTL-driven input (VIN = 3.4 V); all other inputs at VCC or GND

¶ This parameter is derived for use in total power-supply calculations.