SN74ACT3638

512

× 32 × 2

CLOCKED BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY

SCAS228D – JUNE 1992 – REVISED APRIL 1998

25

POST OFFICE BOX 655303

recommended operating conditions

MIN

MAX

UNIT

VCC

Supply voltage

4.5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High-level output current

–4

mA

IOL

Low-level output current

8

mA

TA

Operating free-air temperature

0

70

°C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

VCC = 4.5 V,

IOH = – 4 mA

2.4

V

VOL

VCC = 4.5 V,

IOL = 8 mA

0.5

V

II

VCC = 5.5 V,

VI = VCC or 0

±5

µA

IOZ

VCC = 5.5 V,

VO = VCC or 0

±5

µA

ICC

VCC = 5.5 V,

VI = VCC – 0.2 V or 0

400

µA

‡

CSA = VIH

A0 – A31

0

‡

V5 5 V O

i

t t 3 4 V

CSB = VIH

B0 – B31

0

∆ICC‡

VCC = 5.5 V, One input at 3.4 V,

Other inputs at VCC or GND

CSA = VIL

A0 – A31

1

mA

Other in uts at VCC or GND

CSB = VIL

B0 – B31

1

All other inputs

1

Ci

VI = 0,

f = 1 MHz

4

pF

Co

VO = 0,

f = 1 MHz

8

pF

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

‡ This is the supply current when each input is at one of the specified TTL voltage levels rather than 0 V or VCC.