SY10H646L

Micrel, Inc. NOT RECOMMENDED FOR NEW DESIGNS 3.3V SINGLE SUPPLY OCTAL PECL/TTL-TO-TTL Precision Edge® Precision ESdY1g0He6®46L SY10SHY610406H6L46L SY100H646L FEATURES s 3.3V power supply s PECL/TTL-to-TTL version of popular ECLinPS E111AE/LE s Guaranteed low skew specification s Three-state enable s Differential internal design s VBB output for single-ended operation s Extra TTL and ECL power/ground pins s Choice of ECL compatibility: 10K or 100K s Matched high and low output impedance s Available in 28-pin PLCC package BLOCK DIAGRAM EN Q0 Q1 Q2 TCLK ECLK ECLK Q3 Q4 Precision Edge® DESCRIPTION The SY10/100H646L are single supply, low skew translating 1:8 clock drivers. Devices in the Micrel H600 translator series utilize the 28-lead PLCC for optimal power pinning, signal flow-through and electrical performance. The single supply H646L is similar to the HA643 which is a dual supply 1:8 version of the same function. These devices feature a 24mA TTL output stage, with AC performance specified into a 20pF load capacitance. The 10H version is compatible with 10K ECL logic levels. The 100H version is compatible with 100K levels. PIN NAMES Pin OGND OVT IGND IVT VEE VCCE ECLK, ECLK VBB Q0–Q7 EN TCLK Function TTL Output Ground (0V) TTL Output VCC (+3.0V) Internal TTL GND (0V) Internal TTL VCC (+3.0V) ECL VEE (0V) ECL Ground (+3.0V) Differential Signal Input (PECL) VBB Reference Output Signal Outputs (TTL) Three-State Enable Input (TTL) Signal Input (TTL) Q5 Q6 VBB Q7 Pr...