MC100EP195B_14 Datasheet, PDF (1/17 Pages) ON Semiconductor – 3.3V ECL Programmable Delay Chip

MC100EP195B
3.3V ECL Programmable
Delay Chip
Descriptions
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.
The IN/IN inputs can accept LVPECL (SE of Diff), or LVDS level
signals. Because the EP195B is designed using a chain of multiplexers
it has a fixed minimum delay of 2.2 ns. An additional pin D10 is
provided for controlling Pins 14 and 15, CASCADE and CASCADE,
also latched by LEN, in cascading multiple PDCs for increased
programmable range. The cascade logic allows full control of multiple
PDCs. Switching devices from all “1” states on D[0:9] with SETMAX
LOW to all “0” states on D[0:9] with SETMAX HIGH will increase
the delay equivalent to “D0”, the minimum increment.
Select input pins D[10:0] may be threshold controlled by
combinations of interconnects between V_EF (pin 7) and V_CF (pin 8)
for LVCMOS, ECL, or LVTTL level signals. For LVCMOS input
levels, leave V_CF and V_EF open. For ECL operation, short V_CF and
V_EF (Pins 7 and 8). For LVTTL level operation, connect a 1.5 V
supply reference to V_CF and leave open V_EF pin. The 1.5 V reference
voltage to V_CF pin can be accomplished by placing a 2.2 kW resistor
between V_CF and V_EE for a 3.3 V power supply.
The V_BB pin, an internally generated voltage supply, is available to
this device only. For single−ended input conditions, the unused
differential input is connected to V_BB as a switching reference voltage.
V_BB may also rebias AC coupled inputs. When used, decouple V_BB
and V_CC via a 0.01 mF capacitor and limit current sourcing or sinking
to 0.5 mA. When not used, V_BB should be left open.
The 100 Series contains temperature compensation.
http://onsemi.com
MARKING
DIAGRAMS*
LQFP−32
FA SUFFIX
CASE 873A
MC100
EP195B
AWLYYWWG
32
1
1 32
QFN32
MN SUFFIX
CASE 488AM
1
MC100
EP195B
ALYWG
G
A
= Assembly Location
WL, L = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
Features
• 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:
V_CC = 3.0 V to 3.6 V with V_EE = 0 V
• NECL Mode Operating Range:
V_CC = 0 V with V_EE = −3.0 V to −3.6 V
• IN/IN Inputs Accept LVPECL, LVNECL, LVDS Levels
• A Logic High on the EN Pin Will Force Q to Logic Low
• D[10:0] Can Select Either LVPECL, LVCMOS, or
LVTTL Input Levels
• V_BB Output Reference Voltage
• These are Pb−Free Devices
© Semiconductor Components Industries, LLC, 2014
1
June, 2014 − Rev. 2
Publication Order Number:
MC100EP195B/D