Philips Semiconductors Programmable Logic Devices
Product specification
Programmable macro logic
PML
PLHS501/PLHS501I
FEATURES
PIN CONFIGURATION
• Programmable Macro Logic device
A Package
(52-pin PLCC)
• Full connectivity
I
I
I
I
I
I
I
I
I
I
I
I
I
5
17 16 15 14 13 12 11 10
9
8
7
6
• TTL compatible
7
6
5
4
3
2
1
52 51 50 49 48 47
8
46
45
44
43
42
41
40
39
38
37
36
35
V
V
I
• SNAP development system:
CC
CC
9
I
– Supports third-party schematic entry
18
4
10
11
12
13
14
15
16
17
18
19
I
I
I
I
I
formats
19
3
I
– Macro library
20
2
1
0
I
– Versatile netlist format for design
portability
21
I
22
– Logic, timing, and fault simulation
I
B
B
B
B
X
23
3
2
1
0
B
4
• Delay per internal NAND function = 6.5ns
B
5
(typ)
B
6
• Testable in unprogrammed state
B
7
7
6
• Security fuse allows protection of
O
0
X
proprietary designs
GND 20
34 GND
21 22 23 24 25 26 27 28 29 30 31 32 33
O
O
O
O
O
O
O
X
X
X
X
X
X
4 5
1
2
3
4
5
6
7
0
1
2
3
STRUCTURE
• NAND gate based architecture
– 72 foldback NAND terms
ARCHITECTURE
DESCRIPTION
The core of the PLHS501 is a programmable
fuse array of 72 NAND gates. The output of
each gate folds back upon itself and all other
NAND gates. In this manner, full connectivity
of all logic functions is achieved in the
PLHS501. Any logic function can be created
within the core of the device without wasting
valuable I/O pins. Furthermore, a speed
advantage is acquired by implementing
multi-level logic within a fast internal core
without incurring any delays from the I/O
buffers.
The PLHS501 is a high-density Bipolar
• 136 input-wide logic terms
• 44 additional logic terms
Programmable Macro Logic device. PML
incorporates a programmable NAND
structure. The NAND architecture is an
efficient method for implementing any logic
function. The SNAP software development
system provides a user friendly environment
for design entry. SNAP eliminates the need
for a detailed understanding of the PLHS501
architecture and makes it transparent to the
user. PLHS501 is also supported on the
Philips Semiconductors SNAP software
development systems.
• 24 dedicated inputs (I – I
)
0
23
• 8 bidirectional I/Os with individual 3-State
enable:
– 4 Active-High (B – B )
4
7
– 4 Active-Low (B – B )
0
3
• 16 dedicated outputs:
– 4 Active-High outputs
O , O with common 3-State enable
0
1
O , O with common 3-State enable
The PLHS501 is ideal for a wide range of
microprocessor support functions, including
bus interface and control applications.
2
3
– 4 Active-Low outputs:
O , O with common 3-State enable
4
5
The PLHS501 is also processed to industrial
requirements for operation over an extended
temperature range of –40°C to +85°C and
supply voltage of 4.5V to 5.5V.
O , O with common 3-State enable
6
7
– 8 Exclusive-OR outputs:
X , X with common 3-State enable
0
1
X , X with common 3-State enable
2
3
X , X with common 3-State enable
4
5
X , X with common 3-State enable
6
7
PML is a trademark of Philips Semiconductors
October 22, 1993
1
853–1207 11164