GAL20V8C-5LJ Lattice, GAL20V8C-5LJ Datasheet - Page 7

• Manufacturer Part Number: GAL20V8C-5LJ
• Description: SPLD GAL Family 8 Macro Cells 166MHz EECMOS Technology 5V 28-Pin PLCC
• Manufacturer: Lattice

Specifications of GAL20V8C-5LJ

• Package: 28PLCC
• Family Name: GAL
• Maximum Propagation Delay Time: 5 ns
• Typical Operating Supply Voltage: 5 V
• Maximum Internal Frequency: 166 MHz
• Number Of Product Terms Per Macro: 8
• Re-programmability Support: Yes

In the Registered mode, macrocells are configured as dedicated
registered outputs or as I/O functions.
Architecture configurations available in this mode are similar to the
common 20R8 and 20RP4 devices with various permutations of
polarity, I/O and register placement.
All registered macrocells share common clock and output enable
control pins. Any macrocell can be configured as registered or I/
O. Up to eight registers or up to eight I/Os are possible in this mode.
Note: The development software configures all of the architecture control bits and checks for proper pin usage automatically.
Registered Mode
OE
CLK
XOR
XOR
D
Q
Q
5
Dedicated input or output functions can be implemented as sub-
sets of the I/O function.
Registered outputs have eight product terms per output. I/Os have
seven product terms per output.
The JEDEC fuse numbers, including the User Electronic Signature
(UES) fuses and the Product Term Disable (PTD) fuses, are shown
on the logic diagram on the following page.
Registered Configuration for Registered Mode
Combinatorial Configuration for Registered Mode
- SYN=0.
- AC0=1.
- XOR=0 defines Active Low Output.
- XOR=1 defines Active High Output.
- AC1=0 defines this output configuration.
- Pin 1 controls common CLK for the registered outputs.
- Pin 13 controls common OE for the registered outputs.
- Pin 1 & Pin 13 are permanently configured as CLK &
- SYN=0.
- AC0=1.
- XOR=0 defines Active Low Output.
- XOR=1 defines Active High Output.
- AC1=1 defines this output configuration.
- Pin 1 & Pin 13 are permanently configured as CLK &
OE for registered output configuration.
OE for registered output configuration..
Specifications GAL20V8