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3.3 V ECL Programmable Delay Chip

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Overview

The MC100EP195B is a Programmable Delay Chip (PDC) designed primarily for clock deskewing and timing adjustment. It provides variable delay of a differential NECL/PECL input transition. The delay section consists of a programmable matrix of gates and multiplexers as shown in the logic diagram, Figure 2. The delay increment of the EP195B has a digitally selectable resolution of about 10 ps and a net range of up to 10.2 ns. The required delay is selected by the 10 data select inputs D(9:0) values and controlled by the LEN (pin 10). A LOW level on LEN allows a transparent LOAD mode of real time delay values by D(9:0). A LOW to HIGH transition on LEN will LOCK and HOLD current values present against any subsequent changes in D(10:0). The approximate delay values for varying tap numbers correlating to D0 (LSB) through D9 (MSB) are shown in Table 6 and Figure 3.

  • Automated Test Equipment (ATE)
  • Maximum Input Clock Frequency >1.2 GHz Typical
  • Programmable Range: 0 ns to 10 ns
  • Delay Range: 2.2 ns to 12.2 ns
  • 10 ps Increments
  • PECL Mode Operating Range:VCC = 3.0 V to 3.6 V with VEE = 0 V
  • NECL Mode Operating Range:VCC = 0 V with VEE = 3.0 V to 3.6 V
  • IN/INb Inputs Accept LVPECL, LVNECL, LVDS Levels
  • A Logic High on the EN Pin Will Force Q to Logic Low
  • D10:0 Can Select Either LVPECL, LVCMOS, or LVTTL Input Levels
  • VBB Output Reference Voltage

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Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

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ON Target

Input Level

Output Level

VCC Typ (V)

fMax Typ (MHz)

td(prog) Min (ns)

td(prog) Max (ns)

td(step) Typ (ps)

tJitter Typ (ps)

tR & tF Max (ps)

Reference Price

MC100EP195BFAG

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Active

CAD Model

Pb

A

H

P

LQFP-32

2

260

JTRAY

250

Y

ECL

ECL

3.3

1200

8.95

12.11

11

1.1

300

Price N/A

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MC100EP195BMNG

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Active

CAD Model

Pb

A

H

P

QFN-32

2

260

TUBE

74

Y

CML

ECL

3.3

1200

8.95

12.11

11

1.1

300

Price N/A

More Details

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