SY89834U
FEATURES s Selects between two LVTTL/CMOS inputs and provides 4 LVPECL output copies s Guaranteed AC performance over temperature and voltage:
- DC-to >1.0GHz throughput
- <500ps propagation delay (IN-to-Q)
- < 20ps within-device skew
- < 225ps rise/fall time s Ultra-low jitter design:
- < 1ps RMS cycle-to-cycle jitter
- < 1ps RMS random jitter
- < 10ps PP deterministic jitter
- < 10ps PP total jitter (clock) s Low voltage 2.5V and 3.3V supply operation s 100K LVPECL outputs s Industrial temperature range:
- 40°C to +85°C s Includes a 2:1 MUX select input s Accepts single-ended TTL/CMOS inputs and provides four LVPECL outputs s Available in 16-pin (3mm × 3mm) MLF™ package
Precision Edge®
DESCRIPTION
The SY89834U is a high-speed, 1GHz LVTTL/CMOS-to LVPECL fanout buffer/translator optimized for high-speed ultra-low skew applications. The input stage is designed to accept two single-ended LVTTL/CMOS patible signals that feed into a 2:1 MUX. The selected input is translated and distributed as four differential 100K LVPECL outputs. Within device skew is guaranteed to be less than 20ps over supply voltage and temperature.
The single-ended input buffers accept TTL/CMOS logic levels. The internal threshold of the buffers is defined as VCC/2.
The SY89834U is a part of Micrel's high-speed Precision Edge® family. For applications that require a different I/O bination, consult Micrel's website at: .micrel., and choose from a prehensive product line of highspeed, low-skew fanout buffers, translators and clock generators.
APPLICATIONS s Processor clock distribution/translation s SONET clock distribution/translation s Fibre Channel clock distribution/translation s Gigabit Ethernet clock distribution/translation s Single-ended ASIC-to-differential munication
IC signal translation
FUNCTIONAL BLOCK DIAGRAM
1:4
SEL (LVTTL/CMOS)
IN1 (LVTTL/CMOS)
IN2 (LVTTL/CMOS)
EN LVTTL/CMOS)
1 MUX 0
Q0 /Q0
Q1 /Q1
Q2 /Q2
Q3 /Q3
Precision Edge is a registered trademark of Micrel, Inc. Micro Lead...
