Philips Semiconductors

Product specification

PLUS405-37/-45

Programmable logic sequencers

(16

× 64 × 8)

2

1996 Nov 12

853–1280 17500

DESCRIPTION

The PLUS405 devices are bipolar, programmable state machines of

the Mealy type. Both the AND and the OR array are

user-programmable. All 64 AND gates are connected to the 16

external dedicated inputs (I0 - I15) and to the feedback paths of the

support complex IF-THEN-ELSE state transitions with a single

All state transition terms can include True, False and Don’t Care

states of the controlling state variables. All AND gates are merged

into the programmable OR array to issue the next-state and

next-output commands to their respective registers. Because the

OR array is programmable, any one or all of the 64 transition terms

can be connected to any or all of the State and Output Registers.

edge-triggered, clocked J-K flip-flops, with Asynchronous Preset and

Reset options. The PLUS405 architecture provides the added

flexibility of the J-K toggle function which is indeterminate on S-R

flip-flops. Each register may be individually programmed such that a

specific Preset-Reset pattern is initialized when the initialization pin

is raised to a logic level “1”. This feature allows the state machine to

be asynchronously initialized to known internal state and output

conditions, prior to proceeding through a sequence of state

transitions. Upon power-up, all registers are unconditionally preset

to “1”. If desired, the initialization input pin (INIT) can be converted to

an Output Enable (OE) function as an additional user-programmable

feature.

Availability of two user-programmable clocks allows the user to

design two independently clocked state machine functions

consisting of four state and four output bits each.

Order codes are listed in the Ordering Information Table.

FEATURES

– 50MHz clock rate

– 58.8MHz clock rate

output registers

APPLICATIONS

PIN CONFIGURATIONS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

N Package

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

CLK

I7

I6

I5/CLK

I4

I3

I2

I1

I0

F7

F6

F5

F4

GND

F3

F2

F1

F0

INIT/OE

I15

I14

I13

I12

I11

I10

I9

I8

CLK

I6

I7

I5/CLK

I8

I9

I4

I3

I2

I1

I0

F7

F6

F5

F4 GND F3

F2

F1 F0

INIT/OE

I15

I14

I13

I12

I11

I10

N = Plastic DIP (600mil-wide)

A = Plastic Leaded Chip Carrier

A Package

SP00251