SN74ALS2238

32 × 9 × 2 ASYNCHRONOUS BIDIRECTIONAL FIRST IN, FIRST OUT MEMORY

SDAS182 − APRIL 1990

8

POST OFFICE BOX 655303

POST OFFICE BOX 1443

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = − 18 mA

− 1.2

V

Status flags

VCC = 4.5 V to 5.5 V,

IOH = − 0.4 mA

VCC −2

VOH

VCC = 4.5 V,

IOH = − 2 mA

VCC −2

V

VOH

A or B ports

VCC = 4.5 V,

IOH = − 3 mA

2.4

3.2

V

VCC = 4.5 V,

IOH = − 15 mA

2

A or B ports

VCC = 4.5 V,

IOL = 12 mA

0.25

0.4

VOL

A or B ports

VCC = 4.5 V,

IOL = 24 mA

0.35

0.5

V

VOL

Status flags

VCC = 4.5 V,

IOL = 4 mA

0.25

0.4

V

Status flags

VCC = 4.5 V,

IOL = 8 mA

0.35

0.5

II

DAF, DBF, RSTA, RSTB, GAB, GBA, SAB,

SBA, LDCKA, LDCKB, UNCKA, UNCKB

VCC = 5.5 V,

VI = 7 V

0.1

mA

II

A or B ports

VCC = 5.5 V,

VI = 7 V

0.2

mA

IIH

DAF, DBF, RSTA, RSTB, GAB, GBA, SAB,

SBA, LDCKA, LDCKB, UNCKA, UNCKB

VCC = 5.5 V,

VI = 2.7 V

20

µA

IIH

A or B ports‡

VCC = 5.5 V,

VI = 2.7 V

40

µA

IIL

DAF, DBF, RSTA, RSTB, GAB, GBA, SAB,

SBA, LCKA, LDCKB, UNCKA, UNCKB

VCC = 5.5 V,

VI = 0.4 V

− 0.2

mA

IIL

A or B ports‡

VCC = 5.5 V,

VI = 0.4 V

− 0.4

mA

IO§

A or B ports‡

VCC = 5.5 V,

VO = 2.25 V

−20

− 130

mA

IO§

Status flags

VCC = 5.5 V,

VO = 2.25 V

−15

− 100

mA

ICC

VCC = 5.5 V

190

350

mA

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

‡ For I/O ports, the parameters IIH and IIL include the offstate output current.

§ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.