DatasheetsPDF.com

B9948L

Part Number	B9948L
Manufacturer	Cypress Semiconductor
Description	1:12 Clock Distribution Buffer
Published	May 5, 2011
Detailed Description	B9948L 2.5V/3.3V, 160-MHz, 1:12 Clock Distribution Buffer Product Features • • • • • • • • • • • 160-MHz clock support ...
Datasheet	B9948L PDF File

Overview

B9948L 2.
5V/3.
3V, 160-MHz, 1:12 Clock Distribution Buffer Product Features • • • • • • • • • • • 160-MHz clock support 2.
5V or 3.
3V output capability 200-ps maximum output-to-output skew LVPECL or LVCMOS/LVTTL clock input LVCMOS/LVTTL compatible inputs 12 clock outputs: drive up to 24 clock lines Synchronous Output Enable Output Three-state control Pin compatible with MPC948L Industrial temp.
range: –40°C to +85°C 32-pin TQFP package Description The B9948L is a low-voltage clock distribution buffer with the capability to select either a differential LVPECL or a LVCMOS/ LVTTL compatible input clock.
The two clock sources can be used to provide for a test clock as well as the primary system clock.
All other control inputs are LVCMOS/LVTTL compatible.
The twelve outputs are 2.
5V or 3.
3V LVCMOS or LVTTL compatible and can drive two series-terminated 50Ω transmission lines.
With this capability the B9948L has an effective fanout of 1:24.
The outputs can also be three-stated via the threestate input TS#.
Low output-to-output skews make the B9948L an ideal clock distribution buffer for nested clock trees in the most demanding of synchronous systems.
The B9948L also provides a synchronous output enable input for enabling or disabling the output clocks.
Since this input is internally synchronized to the input clock, potential output glitching or runt pulse generation is eliminated.
Block Diagram Pin Configuration VSS Q0 VDDC Q1 VSS Q2 VDDC Q3 32 31 30 29 28 27 26 25 VDD PECL_CLK PECL_CLK# TCLK TCLK_SEL SYNC_OE TS# 0 1 VDDC 12 Q0-Q11 TCLK_SEL TCLK PECL_CLK PECL_CLK# SYNC_OE TS# VDD VSS 1 2 3 4 5 6 7 8 B9948L 9 10 11 12 13 14 15 16 24 23 22 21 20 19 18 17 VSS Q4 VDDC Q5 VSS Q6 VDDC Q7 www.
DataSheet4U.
com Cypress Semiconductor Corporation Document #: 38-07080 Rev.
*C • 3901 North First Street • San Jose Q11 VDDC Q10 VSS Q9 VDDC Q8 VSS • CA 95134 • 408-943-2600 Revised December 21, 2002 B9948L Pin Description[1] Pin 3 4 2 9, 11, 13, 15, 17, 19, 21, 23, 25,...

Similar Datasheet

B9940L 1:18 Clock Distribution Buffer - Cypress Semiconductor
B9946 3.3V 160-MHz 1:10 Clock Distribution Buffer - Cypress Semiconductor
B9947 1:9 Clock Distribution Buffer - Cypress Semiconductor
B9948 1:12 Clock Distribution Buffer - Cypress Semiconductor
B9948L 1:12 Clock Distribution Buffer - Cypress Semiconductor
B9949 1:15 Clock Distribution Buffer - Cypress Semiconductor

@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)