CGS2535V Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Commercial Quad 1 to 4 Clock Drivers/Industrial Quad 1 to 4 Clock Drivers

March 1997
CGS2535V/CGS2535TV
Commercial Quad 1 to 4 Clock Drivers/Industrial Quad
1 to 4 Clock Drivers
General Description
These Clock Generation and Support clock drivers are spe-
cifically designed for driving memory arrays requiring large
fanouts while operating at high speeds.
This device meets the rise and fall time requirements of the
90 and 100 MHz Pentium™ processors.
The CGS2535 is a non-inverting 4 to 16 driver with CMOS
I/O structures. The CGS2535 specification guarantees
part-to-part skew variation.
Features
n Guaranteed:
— 1.0 ns rise and fall times while driving 12 inches of
50Ω microstrip terminated with 25 pF
— 350 ps pin-to-pin skew (t_OSLH and t_OSHL)
n 650 ps part-to-part variation on positive or negative
transition @ 5V V_CC
n Operates with either 3.3V or 5.0V supply
n Inputs 5V tolerant with V_CC in 3.3V range
n Symmetric output current drive: 24 mA I_OH/I_OL
n Industrial temperature range −40˚C to +85˚C
n Symmetric package orientation
n Large fanout for memory driving applications
n Guaranteed 2 kV ESD protection
n Implemented on National’s ABT family process
n 28-pin PLCC for optimum skew performance
Connection Diagrams
Pin Assignment for 28-Pin PLCC
CGS2535
Truth Table
Input
In (0–3)
Output
ABCD Out (0–3)
DS011954-5
DS011954-2
Pentium™ is a trademark of Intel Corporation.
© 1997 National Semiconductor Corporation DS011954
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