PLUS16R4

• Ultra high-speed
tPD  = 7.5ns and fMAX = 74MHz for the PLUS16R8-7 Series
tPD  = 10ns and fMAX = 60 MHz for the PLUS16R8D Series
• 100% functionally and pin-for-pin compatible with industry standard 20-pin PAL ICs
• Power-up reset function to enhance state machine design and testability
• Design support provided via SNAP and other CAD tools for Series 20 PAL devices
• Field-programmable on industry standard programmers
• Security fuse
• Individual 3-State control of all outputs

NOTE:
1. Stresses above those listed may cause malfunction or permanent damage to the device. This is a stress rating only. Functional operation at these or any other condition above those indicated in the operational and programming specification of the device is not implied.

The Philips Semiconductors PLUS16XX family consists of ultra high-speed 7.5ns and 10ns versions of Series 20 PAL devices.

The PLUS16XX family is 100% functional and pin-compatible with the 16L8, 16R8,16R6, and 16R4 Series devices.

The sum of products (AND-OR) architecture is comprised of 64 programmable AND gates and 8 fixed OR gates. Multiple bidirectional pins provide variable input/output pin ratios. Individual 3-State control of all outputs and registers with feedback (R8, R6, R4) is also provided. Proprietary designs of PLUS16XX family can be protected by programming the security fuse.

The PLUS16R8, R6, and R4 have D-type flip-flops which are loaded on the Low-to-High transition of the clock input. In order to facilitate state machine design and testing, a power-up reset function has been incorporated into these devices to reset all internal registers to Active-Low after a specific period of time.

The Philips Semiconductors State-of-the-Art oxide isolation Bipolar fabrication process is employed to achieve high-performance operation.

The PLUS16XX family of devices are field programmable, enabling the user to quickly generate custom patterns using standard programming equipment. See the programmer chart for qualified programmers.

The SNAP software package from Philips Semiconductors supports easy design entry for the PLUS16XX series as well as other PLD devices from Philips Semiconductors.The PLUS16XX series are also supported by other standard CAD tools for PAL-type devices.

Order codes are listed in the Ordering Information table.