SN54AS856, SN74AS856

8BIT UNIVERSAL TRANSCEIVER PORT CONTROLLERS

SDAS032A − DECEMBER 1983 − REVISED MARCH 1985

POST OFFICE BOX 655303

3

OEB

1

EN3

OEA

2

EN4

MODE

3

M0

CLK

23

Z2

M1

SERIN

22

Z6

Z7

4

A1

4

8,0

9,1

1,5D

0,5D

B1

21

6

7

≥1

I = 0

3

Z8

Z9

Z12

Z11

3

I = 0

≥1

10

20

B2

0,5D

12,1

11,0

4

A2

5

Z10

Z28

11

A8

4

29,0

30,1

0,5D

B8

14

28

≥1

I = 0

3

Z29

A3

6

19

B3

A4

7

18

B4

A5

8

17

B5

A6

9

16

B6

A7

10

15

B7

13

Q8

Z30

1

→/C5

2

SRG8

(PORT CONTROLLER)

Pin numbers shown are for DW, JT, and NT packages.

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.