MC10EP195, MC100EP195
3.3V ECL Programmable
Delay Chip
The MC10/100EP195 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 3. The delay
increment of the EP195 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 4.
http://onsemi.com
MARKING
DIAGRAM*
MCXXX
EP195
AWLYYWWG
32
LQFP−32
FA SUFFIX
CASE 873A
1
Because the EP195 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.
1
MCXXX
EP195
32
1
QFN32
MN SUFFIX
CASE 488AM
AWLYYWWG
G
Select input pins D[10:0] may be threshold controlled by
combinations of interconnects between V (pin 7) and V (pin 8)
EF
CF
XXX
A
= 10 or 100
= Assembly Location
for LVCMOS, ECL, or LVTTL level signals. For LVCMOS input
levels, leave V and V open. For ECL operation, short V and
CF
EF
CF
WL, L = Wafer Lot
YY, Y
V
EF
(Pins 7 and 8). For LVTTL level operation, connect a 1.5 V
= Year
supply reference to V and leave open V pin. The 1.5 V reference
WW, W = Work Week
CF
EF
G or G = Pb−Free Package
voltage to V pin can be accomplished by placing a 2.2 kW resistor
CF
(Note: Microdot may be in either location)
between V and V for a 3.3 V power supply.
CF
EE
*For additional marking information, refer to
Application Note AND8002/D.
The V pin, an internally generated voltage supply, is available to
BB
this device only. For single−ended input conditions, the unused
differential input is connected to V as a switching reference voltage.
BB
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 17 of this data sheet.
V
BB
may also rebias AC coupled inputs. When used, decouple V
BB
and V via a 0.01 mF capacitor and limit current sourcing or sinking
CC
to 0.5 mA. When not used, V should be left open.
BB
The 100 Series contains temperature compensation.
• Maximum Input Clock Frequency >1.2 GHz Typical
• Programmable Range: 0 ns to 10 ns
• Delay Range: 2.2 ns to 12.2 ns
• Open Input Default State
• Safety Clamp on Inputs
• A Logic High on the EN Pin Will Force Q to Logic
Low
• 10 ps Increments
• PECL Mode Operating Range:
• D[10:0] Can Accept Either ECL, LVCMOS, or LVTTL
Inputs
V
CC
= 3.0 V to 3.6 V with V = 0 V
EE
• V Output Reference Voltage
• Pb−Free Packages are Available
BB
• NECL Mode Operating Range:
= 0 V with V = −3.0 V to −3.6 V
V
CC
EE
© Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
December, 2006 − Rev. 16
MC10EP195/D