SN54AS877, SN74AS877

8BIT UNIVERSAL TRANCEIVER PORT CONTROLLERS

SDAS234 − D2661, DECEMBER 1982 − REVISED AUGUST 1985

POST OFFICE BOX 655303

POST OFFICE BOX 1443

5

absolute maximum ratings over free-air temperature range

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage:

All inputs

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O ports

5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage applied to a disabled 3-state output

5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range:

SN54AS877

−55

°C to 125°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74AS877

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

recommended operating conditions

SN54AS877

SN74AS877

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

IOH

High-level input voltage

A1-A8, B1-B8

−12

−15

mA

IOH

High-level input voltage

Q8

−2

−2

mA

IOL

Low-level input voltage

A1-A8, B1-B8

32

48

mA

Q8

20

20

fclock

Clock frequency

0

45

0

50

MHz

tw

Pulse duration, CLK

11

10

ns

A1-A8, B1-B8

5.5

5.5

tsu

Setup time before CLK

↑

SERIN

5.5

5.5

ns

S0, S1, S2

5.5

5.5

A1-A8, B1-B8

0

0

th

Hold time, data after CLK

↑

SERIN

0

0

ns

S0, S1, S2

0

0

ns

TA

Operating free-air temperature

−55

125

0

70

°C