ASM2I2318ANZ

Features:

􀂃 One input to 18 output Buffer/Driver
􀂃 Supports up to four SDRAM DIMMs
􀂃 Two additional outputs for feedback
􀂃 Serial interface for individual output control
􀂃 Low skew outputs (< 250 pS)
􀂃 Up to 133 MHz operation
􀂃 Dedicated OE pin for testing
􀂃 Space-saving 48 Pin SSOP package
􀂃 3.3V operation

Pinout




Specifications

Symbol	Parameter	Rating	Unit
VDD	Supply Voltage to Ground Potential	0.5 to +7.0	V
VIN	DC Input Voltage (Except BUF_IN)	0.5 to VDD + 0.5	V
VBUFIN	DC Input Voltage (BUF_IN)	0.5 to +7.0	V
TSTG	Storage Temperature	65 to +150
TJ	Junction Temperature	150
TDV	Static Discharge Voltage (As per JEDEC STD 22- A114-B)	2	KV
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability.

Description

The ASM2I2318ANZ is a 3.3V buffer designed to distribute high-speed clocks in PC applications. The part has 18 outputs, 16 of which can be used to drive up to four SDRAM DIMMs, and the remaining can be used for external feedback to a PLL. The device operates at 3.3V and outputs can run up to 133MHz, thus making it compatible with Pentium II®* processors. The ASM2I2318ANZ can be used in conjunction with the clock synthesizer for a complete Pentium II motherboard solution. The ASM2I2318ANZ also includes a serial interface which can enable or disable each output clock. On power-up, all output clocks are enabled (internal pull up). A separate Output Enable pin facilitates testing on ATE.