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SY100S815

Single Supply Quad PECL/TTL-to-PECL

Status: Not Recommended for new designs

Features:

  • Quad PECL version of popular ECLinPS E111
  • Low skew
  • Guaranteed skew spec
  • TTL enable input
  • Selectable TTL or PECL clock input
  • Single +5V supply
  • Differential internal design
  • PECL I/O fully compatible with industry standard
  • Internal 75kΩ PECL input pull-down resistors
  • Available in 16-pin SOIC package
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Device Overview

Summary

The SY100S815 is a low skew 1-to-4 PECL differential driver designed for clock distribution in new, highperformance PECL systems. It accepts either a PECL clock input or a TTL input by using the TTL enable pin TEN. When the TTL enable pin is HIGH, the TTL input is enabled and the PECL input is disabled. When the enable pin is set LOW, the TTL input is disabled and the PECL input is enabled.

The device is specifically designed and produced for low skew. The interconnect scheme and metal layout are carefully optimized for minimal gate-to-gate skew within the device. Wafer characterization and process control ensure consistent distribution of propagation delay from lot to lot. Since the S815 shares a common set of "basic" processing with the other members of the ECLinPS family, wafer characterization at the point of device personalization allows for tighter control of parameters, incuding propagation delay.

To ensure that the skew specification is met, it is necessary that both sides of the differential output are terminated into 50Ω, even if only one side is being used. In most applications, all nine differential pairs will be used and, therefore, terminated. In the case where fewer than nine pairs are used, it is necessary to terminate at least the output pairs on the same package side (i.e. sharing the same VCCO as the pair(s) being used on that side) in order to maintain minimum skew.

Additional Features
    • Quad PECL version of popular ECLinPS E111
    • Low skew
    • Guaranteed skew spec
    • TTL enable input
    • Selectable TTL or PECL clock input
    • Single +5V supply
    • Differential internal design
    • PECL I/O fully compatible with industry standard
    • Internal 75kΩ PECL input pull-down resistors
    • Available in 16-pin SOIC package
Parametrics
Name
Value
Description
2:4
Input
PECL/TTL
Output
PECL
Supply Voltage
5V
Max Freq (GHz)
0.75
Max Prop Delay (ps)
<950
Icc (mA)
60
Max Within Device Skew (ps)
<50
OE
True
RPE
False
FSI
False
Input Mux
True
Input EQ
False

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