82C85

Features:

* Generates the System Clock For CMOS or NMOS Microprocessors and Peripherals
* Complete Control Over System Operation for Very Low System Power
   - Stop-Oscillator
   - Low Frequency
   - Stop-Clock
   - Full Speed Operation
* DC to 25MHz Operation (DC to 8MHz System Clock)
* Generates 50% and 33% Duty Cycle Clocks (Synchronized)
* Uses a Parallel Mode Crystal Circuit or External Frequency Source
* TTL Compatible Inputs/Outputs
* 24 Lead Slimline Dual-In-Line or 28 Pad Square LCC Package Options
* Single 5V Power Supply
* Operating Temperature Range
   - C82C85 . . . . . . . . . . . . . . . . . . . . . . . . . .0  to +70
   - I82C85 . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +85
   - M82C85 . . . . . . . . . . . . . . . . . . . . . . . -55 to +125


Pinout




Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+8.0V
Input, Output or I/O Voltage . . . . . . . . . . . GND -0.5V to V_CC +0.5V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Class 1


Description

The Intersil 82C85 Static CMOS Clock Controller/Genera- tor provides complete control of static CMOS system oper- ating modes and supports full speed, slow, stop-clock and stop-oscillator operation. While directly compatible with the Intersil 80C86 and 80C88 16-bit Static CMOS Microproces-
sor Family, the 82C85 can also be used for general system clock control.
For static system designs, separate signals are provided on the 82C85 for stop (S0, S1, S2/STOP) and start (START) control of the crystal oscillator and system clocks. A single control line (SLO/FST) determines 82C85 fast (crystal/EFI frequency divided by 3) or slow (crystal/EFI frequency divided by 768) mode operation. Automatic maximum mode 80C86 and 80C88 software HALT instruction decode logic in the 82C85 enables software- based clock control. Restart logic insures valid clock start- up and complete synchronization of system clocks.
The 82C85 is manufactured using the Intersil advanced Scaled SAJI IV CMOS process. In addition to clock control circuitry, the 82C85 also contains a crystal controlled oscillator (up to 25MHz), clock generation logic, complete "Ready" synchronization and reset logic. This permits the designer to tailor the system power-performance product to provide optimum performance at low power levels.