SN74ALS233B

16

× 5 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY

SCAS253B – MARCH 1990 – REVISED APRIL 1998

5

POST OFFICE BOX 655303

recommended operating conditions (see Note 2)

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High level output current

Q outputs

–1.6

mA

IOH

High-level output current

Status flags

–0.4

mA

IOL

Low level output current

Q outputs

24

mA

IOL

Low-level output current

Status flags

8

mA

TA

Operating free-air temperature

0

70

°C

NOTE 2: To ensure proper operation of this high-speed FIFO device, it is necessary to provide a clean signal to the LDCK and UNCK clock inputs.

Any excessive noise or glitching on the clock inputs that violates the VIL, VIH, or minimum pulse duration limits can cause a false clock

or improper operation of the internal read and write pointers.

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

VOH

Q outputs

VCC = 4.5 V,

IOH = –2.6 mA

2.4

3.2

V

VOH

Status flags

VCC = 4.5 V to 5.5 V,

IOH = –0.4 mA

VCC–2

V

Q outputs

VCC =4 5V

IOL = 12 mA

0.25

0.4

VOL

Q outputs

VCC = 4.5 V

IOL = 24 mA

0.35

0.5

V

VOL

Status flags

VCC =4 5V

IOL = 4 mA

0.25

0.4

V

Status flags

VCC = 4.5 V

IOL = 8 mA

0.35

0.5

IOZH

VCC = 5.5 V,

VO = 2.7 V

20

µA

IOZL

VCC = 5.5 V,

VO = 0.4 V

–20

µA

II

VCC = 5.5 V,

VI = 7 V

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

µA

IIL

VCC = 5.5 V,

VI = 0.4 V

–0.2

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

–30

–112

mA

ICC

VCC = 5.5 V

88

133

mA

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

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