ON MC100EP196B 3.3 v ecl programmable delay chip with ftune Datasheet

MC100EP196B
3.3 V ECL Programmable
Delay Chip With FTUNE
Descriptions
The MC100EP196B 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. It has similar
architecture to the EP195 with the added feature of further tunability in
delay using the FTUNE pin. The FTUNE input takes an analog voltage
from VCC to VEE to fine tune the output delay from 0 to 60 ps.
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 EP196B has a digitally selectable resolution of about
10 ps and a net range of up to 10.4 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.
The IN/IN inputs can accept LVPECL (SE or Diff), or LVDS level
signals. Because the MC100EP196B 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 VEF (pin 7) and VCF (pin 8) for
receiving LVCMOS, ECL, or LVTTL level signals. For LVCMOS input
levels, leave VCF and VEF open. For ECL operation, short VCF and VEF
(Pins 7 and 8). For LVTTL level operation, connect a 1.5 V supply
reference to VCF and leave open VEF pin. The 1.5 V reference voltage at
the VCF pin can be accomplished by placing a 2.2 kW resistor between
VCF and VEE for a 3.3 V power supply.
The VBB pin, an internally generated voltage supply, is available to
this device only. For single−ended input conditions, the unused
differential input is connected to VBB as a switching reference voltage.
VBB may also rebias AC coupled inputs. When used, decouple VBB and
VCC via a 0.01 mF capacitor and limit current sourcing or sinking to
0.5 mA. When not used, VBB should be left open.
The 100 Series contains temperature compensation.
Features
•
•
•
•
•
•
April, 2008 − Rev. 1
MARKING
DIAGRAMS*
MC100
EP196B
AWLYYWWG
LQFP−32
FA SUFFIX
CASE 873A
32
1
1
MC100
EP196B
ALYWG
32
1
QFN32
MN SUFFIX
CASE 488AM
A
L
Y
W
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
*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 16 of this data sheet.
• NECL Mode Operating Range:
Maximum Input Clock Frequency >1.2 GHz Typical
Programmable Range: 0 ns to 10 ns
Delay Range: 2.2 ns to 12.4 ns
10 ps Increments
Linearity ±40 ps max
PECL Mode Operating Range:
VCC = 3.0 V to 3.6 V with VEE = 0 V
© Semiconductor Components Industries, LLC, 2008
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•
•
•
•
•
1
VCC = 0 V with VEE = −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
VBB Output Reference Voltage
These are Pb−Free Devices
Publication Order Number:
MC100EP196B/D
D8
VEE
D3
30
29
28
27
D1
D4
31
D2
D5
32
D6
D7
MC100EP196B
26
25
1
24
VEE
D9
2
23
D0
D10
3
22
VCC
4
21
Q
IN
MC100EP196B
IN
5
20
VBB
6
19
VCC
7
18
VCC
17
FTUNE
VEF
8
15
16
EN
14
CASCADE
13
CASCADE
12
VCC
11
SETMAX
10
SETMIN
VEE
9
LEN
VCF
Q
Warning: All VCC and VEE pins must be externally connected
to Power Supply to guarantee proper operation.
Figure 1. 32−Lead LQFP (Top View)
27
26
D1
28
D2
29
D3
D5
30
VEE
D6
31
D4
D7
32
25
D8
1
24
VEE
D9
2
23
D0
D10
3
22
VCC
IN
4
21
Q
IN
5
20
Q
VBB
6
19
VCC
VEF
7
18
VCC
VCF
8
17
FTUNE
MC100EP196B
12
13
14
15
16
VCC
CASCADE
CASCADE
EN
LEN
VEE
11
SETMAX
10
SETMIN
9
Exposed Pad (EP)
Figure 2. 32−Lead QFN (Top View)
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MC100EP196B
Table 1. PIN DESCRIPTION
Pin
Name
I/O
Default State
Description
23, 25, 26, 27,
29, 30, 31, 32,
1, 2
D[0:9]
LVCMOS, LVTTL,
ECL Input
Low
Single−Ended Parallel Data Inputs [0:9]. Internal 75 kW to VEE.
(Note 1)
3
D[10]
LVCMOS, LVTTL,
ECL Input
Low
Single−Ended CASCADE/CASCADE Control Input. Internal 75 kW
to VEE. (Note 1)
4
IN
LVPECL, LVDS
Low
Noninverted Differential Input. Internal 75 kW to VEE.
5
IN
LVPECL, LVDS
High
Inverted Differential Input. Internal 75 kW to VEE.
6
VBB
−
−
ECL Reference Voltage Output
7
VEF
−
−
Reference Voltage for ECL Mode Connection
8
VCF
−
−
LVCMOS, ECL, OR LVTTL Input Mode Select
9, 24, 28
VEE
−
−
Negative Supply Voltage. All VEE Pins must be Externally
Connected to Power Supply to Guarantee Proper Operation.
(Note 2)
13, 18, 19, 22
VCC
−
−
Positive Supply Voltage. All VCC Pins must be externally
Connected to Power Supply to Guarantee Proper Operation.
(Note 2)
10
LEN
ECL Input
Low
Single−ended D pins LOAD / HOLD input. Internal 75 kW to VEE.
11
SETMIN
ECL Input
Low
Single−ended Minimum Delay Set Logic Input. Internal 75 kW to
VEE. (Note 1)
12
SETMAX
ECL Input
Low
Single−ended Maximum Delay Set Logic Input. Internal 75 kW to
VEE. (Note 1)
14
CASCADE
ECL Output
−
Inverted Differential Cascade Output for D[10]. Typically Terminated
with 50 W to VTT = VCC − 2 V.
15
CASCADE
ECL Output
−
Noninverted Differential Cascade Output. for D[10] Typically
Terminated with 50 W to VTT = VCC − 2 V.
16
EN
ECL Input
Low
17
FTUNE
Analog Input
−
Fine Tune Input
21
Q
ECL Output
−
Noninverted Differential Output. Typically Terminated with 50 W to
VTT = VCC − 2 V.
20
Q
ECL Output
−
Inverted Differential Output. Typically Terminated with 50 W to
VTT = VCC − 2 V.
Single−ended Output Enable Pin. Internal 75 kW to VEE.
1. SETMIN will override SETMAX if both are high. SETMAX and SETMIN will override all D[0:10] inputs.
2. All VCC and VEE pins must be externally connected to Power Supply to guarantee proper operation.
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MC100EP196B
Table 2. CONTROL PIN
Pin
State
EN
LOW (Note 3)
Function
HIGH
LEN
Output Holds Logic Low State
LOW (Note 3)
HIGH
SETMIN
SETMAX
D10
Input Signal is Propagated to the Output
Transparent or LOAD mode for real time delay values present on D[0:10].
LOCK and HOLD mode for delay values on D[0:10]; further changes on D[0:10]
are not recognized and do not affect delay.
LOW (Note 3)
Output Delay set by D[0:10]
HIGH
Set Minimum Output Delay
LOW (Note 3)
Output Delay set by D[0:10]
HIGH
Set Maximum Output Delay
LOW (Note 3)
CASCADE Output LOW, CASCADE Output HIGH
HIGH
CASCADE Output LOW, CASCADE Output HIGH
3. Internal pulldown resistor will provide a logic LOW if pin is left unconnected.
Table 3. CONTROL D[0:10] INTERFACE
VCF
VEF Pin (Note 4)
VCF
No Connect
VCF
1.5 V $ 100 mV
ECL Mode
LVCMOS Mode
LVTTL Mode (Note 5)
4. Short VCF (pin 8) and VEF (pin 7).
5. When Operating in LVTTL Mode, the reference voltage can be provided by connecting an external resistor, RCF (suggested resistor value
is 2.2 kW $5%), between VCF and VEE pins.
Table 4. DATA INPUT ALLOWED OPERATING VOLTAGE MODE TABLE
CONTROL DATA SELECT INPUTS PINS (D [0:10])
POWER SUPPLY
LVCMOS
LVTTL
LVPECL
LVNECL
PECL Mode Operating Range
YES
YES
YES
N/A
NECL Mode Operating Range
N/A
N/A
N/A
YES
Table 5. ATTRIBUTES
Characteristics
Value
Internal Input Pulldown Resistor
ESD Protection
(R1)
Human Body Model
Machine Model
Charged Device Model
Moisture Sensitivity, Indefinite Time Out of Drypack (Note 6)
QFN−32
LQFP−32
Flammability Rating Oxygen Index: 28 to 34
75 kW
> 2 kV
> 100 V
> 2 kV
Pb−Free Pkg
Level 1
Level 2
UL 94 V−0 @ 0.125 in
Transistor Count
1237 Devices
Meets or exceeds JEDEC Spec EIA/JESD78 IC Latchup Test
6. For additional information, see Application Note AND8003/D.
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5
Figure 3. Logic Diagram
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VEE
VEF
VCF
VBB
EN
IN
IN
FTUNE
SET MAX
SET MIN
LEN
512
GD*
D9
1
0
D10
Latch
256
GD*
D8
1
0
D7
1
CASCADE
CASCADE
128
GD*
0
64
GD*
D6
1
0
16
GD*
1
D4
10 BIT LATCH
D5
1
0
8
GD*
D3
1
0
4
GD*
D2
1
0
2
GD*
D1
1
0
(FIXED MINIMUM DELAY APPROX. 2.4 ns)
*GD = (GATE DELAY) APPROXIMATELY 10 ps DELAY PER GATE
32
GD*
0
D0
1
GD*
1
0
1
GD*
1
0
Q
Q
MC100EP196B
MC100EP196B
Table 6. THEORETICAL DELAY VALUES
D(9:0) Value
SETMIN
SETMAX
Programmable Delay*
XXXXXXXXXX
H
L
0 ps
0000000000
L
L
0 ps
0000000001
L
L
10 ps
0000000010
L
L
20 ps
0000000011
L
L
30 ps
0000000100
L
L
40 ps
0000000101
L
L
50 ps
0000000110
L
L
60 ps
0000000111
L
L
70 ps
0000001000
L
L
80 ps
0000010000
L
L
160 ps
0000100000
L
L
320 ps
0001000000
L
L
640 ps
0010000000
L
L
1280 ps
0100000000
L
L
2560 ps
1000000000
L
L
5120 ps
1111111111
L
L
10230 ps
XXXXXXXXXX
L
H
10240 ps
*Fixed minimum delay not included.
Table 7. TYPICAL FTUNE DELAY PIN
Input Range
Output Range
VCC−VEE (V)
0 − 60 (ps)
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MC100EP196B
15000
14000
13000
85°C
12000
25°C
11000
DELAY ( ps)
10000
−40°C
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
0
100
200
300
400
500
600
700
800
900
1000
Rating
Unit
Decimal Value of Select Inputs (D[9:0])
Figure 4. Measured Delay vs. Select Inputs
Table 8. MAXIMUM RATINGS
Symbol
Parameter
Condition 1
Condition 2
VCC
Positive Mode Power Supply
VEE = 0 V
6
V
VEE
Negative Mode Power Supply
VCC = 0 V
−6
V
VI
Positive Mode Input Voltage
Negative Mode Input Voltage
VEE = 0 V
VCC = 0 V
6
−6
V
V
Iout
Output Current
Continuous
Surge
50
100
mA
mA
IBB
VBB Sink/Source
±0.5
mA
TA
Operating Temperature Range
−40 to +85
°C
Tstg
Storage Temperature Range
−65 to +150
°C
qJA
Thermal Resistance (Junction−to−Ambient)
qJC
Tsol
Thermal Resistance (Junction−to−Case)
Wave Solder
Pb−Free
VI ≤ VCC
VI ≥ VEE
0 lfpm
500 lfpm
QFN−32
QFN−32
31
27
°C/W
°C/W
0 lfpm
500 lfpm
LQFP−32
LQFP−32
80
55
°C/W
°C/W
2S2P standard boards
QFN−32
12
°C/W
LQFP−32
12 to 17
°C/W
265
°C
<2 to 3 sec @ 260°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
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MC100EP196B
Table 9. 100EP DC CHARACTERISTICS, PECL VCC = 3.3 V, VEE = 0 V (Note 7)
−40°C
Symbol
Characteristic
25°C
85°C
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
90
115
170
100
140
170
100
145
175
mA
IEE
Negative Power Supply Current
VOH
Output HIGH Voltage (Note 8)
2155
2280
2405
2155
2280
2405
2155
2280
2405
mV
VOL
Output LOW Voltage (Note 8)
1355
1480
1605
1355
1480
1605
1355
1480
1605
mV
VIH
Input HIGH Voltage (Single−Ended)
VIL
Input LOW Voltage (Single−Ended)
VBB
ECL Output Voltage Reference
VCF
LVTTL Mode Input Detect Voltage
VEF
Reference Voltage for ECL Mode Connection
VIHCMR
Input HIGH Voltage Common Mode Range
(Differential Configuration) (Note 9)
IIH
Input HIGH Current (@ VIH)
IIL
Input LOW Current (@ VIL)
LVPECL
CMOS
TTL
2075
2000
2000
2420
3300
3300
2075
2000
2000
2420
3300
3300
2075
2000
2000
2420
3300
3300
LVPECL
CMOS
TTL
1355
0
0
1675
800
800
1490
0
0
1675
800
800
1490
0
0
1675
800
800
IN, IN
mV
mV
1775
1875
1975
1775
1875
1975
1775
1875
1975
mV
1.4
1.5
1.6
1.4
1.5
1.6
1.4
1.5
1.6
V
1900
2020
2150
1900
2020
2150
1900
2020
2150
mV
1.2
3.3
1.2
3.3
1.2
3.3
V
0
150
0
150
0
150
mA
0
150
0
150
0
150
mA
NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit
board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared
operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit
values are applied individually under normal operating conditions and not valid simultaneously.
7. Input and output parameters vary 1:1 with VCC. VEE can vary +0.3 V to −0.3 V.
8. All loading with 50 W to VCC − 2.0 V.
9. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential
input signal.
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MC100EP196B
Table 10. 100EP DC CHARACTERISTICS, NECL VCC = 0 V, VEE = −3.3 V (Note 10)
−40°C
Symbol
Characteristic
25°C
85°C
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
IEE
Negative Power Supply Current
(Note 11)
90
115
170
100
140
170
100
145
175
mA
VOH
Output HIGH Voltage (Note 12)
−1145
−1020
−895
−1145
−1020
−895
−1145
−1020
−895
mV
VOL
Output LOW Voltage (Note 12)
−1945
−1820
−1695
−1945
−1820
−1695
−1945
−1820
−1695
mV
VIH
Input HIGH Voltage (Single−Ended)
LVNECL
−1225
−880
−1225
−880
−1225
−880
VIL
Input LOW Voltage (Single−Ended)
LVNECL
−1945
−1625
−1945
−1625
−1945
−1625
VBB
ECL Output Voltage Reference
−1525
−1425
−1325
−1525
−1425
−1325
−1525
−1425
−1325
mV
VEF
Reference Voltage for ECL Mode Connection
−1400
−1280
−1250
−1400
−1280
−1250
−1400
−1280
−1250
mV
VIHCMR
Input HIGH Voltage Common Mode
Range (Differential Configuration)
(Note 13)
VEE+
1.2
0.0
VEE+
1.2
0.0
VEE+
1.2
0.0
V
IIH
Input HIGH Current (@ VIH)
0
150
0
150
0
150
mA
IIL
Input LOW Current (@ VIL)
0
150
0
150
0
150
mA
IN, IN
mV
mV
NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit
board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared
operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit
values are applied individually under normal operating conditions and not valid simultaneously.
10. Input and output parameters vary 1:1 with VCC. VEE can vary +0.3 V to −0.3 V.
11. Required 500 lfpm air flow when using +5 V power supply. For (VCC − VEE) > 3.3 V, 5 W to 10 W in line with VEE required for maximum thermal
protection at elevated temperatures. Recommend VCC − VEE operation at ≤ 3.8 V.
12. All loading with 50 W to VCC − 2.0 V.
13. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential
input signal.
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MC100EP196B
Table 11. AC CHARACTERISTICS VCC = 0 V; VEE = −3.0 V to −3.6 V or VCC = 3.0 V to 3.6 V; VEE = 0 V (Note 14)
−40°C
Min
Characteristic
Symbol
Typ
25°C
Max
Min
1.2
Typ
85°C
Max
Min
1.2
Typ
fmax
Maximum Frequency
Voutpp
Output Voltage Amplitude
610
820
tPLH
tPHL
Propagation Delay
IN to Q; D(0−10) = 0, SETMIN
IN to Q; D(0−10) = 1023, SETMAX
EN to Q; D(0−10) = 0
D0 to CASCADE
2000
10900
1990
375
2400
12400
2500
475
tRANGE
Programmable Range
tPD (max) − tPD (min)
8950
9950
Dt
Step Delay (Note 15)
D0 High
D1 High
D2 High
D3 High
D4 High
D5 High
D6 High
D7 High
D8 High
D9 High
10
16
32
65
155
310
620
1200
2500
4900
11
18
33
72
166
325
650
1300
2600
5200
15
26
46
92
195
370
720
1400
2800
5500
NLIN
Non−Linearity (Notes 16 and 17)
0 to 511 decimal values for D[9:0] range
512 to 1023 dec. values for D[9:0] range
1 to 1023 decimal values for D[9:0] range
±7.0
±7.0
±11
±7.0
±7.0
±11
±7.0
±7.0
±11
tSKEW
Duty Cycle Skew (Note 18) |tPHL−tPLH|
25
ts
Setup Time
th
Hold Time
tR
Release Time
tjitter
RMS Random Clock Jitter @ 1.2 GHz
IN to Q; D(0:10) = 0 or SETMIN
IN to Q; D(0:10) = 1023 or SETMAX
VPP
Input Voltage Swing
(Differential Configuration)
tr
tf
Output Rise/Fall Time @ 50 MHz
20−80% (Q)
20−80% (CASCADE)
Max
GHz
610
820
mV
610
820
2800
13900
2990
575
2150
11500
2130
400
2500
13000
2600
500
2950
14500
3130
600
2250
12250
2380
425
2700
13750
2800
525
3050
15250
3380
625
10950
9450
10450
11450
10110
11100
12110
90
25
90
25
D to LEN
D to IN (Note 19)
EN to IN (Note 20)
200
500
300
−40
−550
100
200
500
300
−40
−590
100
200
500
300
−40
−650
120
LEN to D
IN to EN (Note 21)
200
400
50
−320
200
400
40
−350
200
400
30
−400
EN to IN (Note 22)
SET MAX to LEN
SET MIN to LEN
300
400
350
−150
180
220
300
400
350
−170
200
250
300
400
350
−200
210
260
0.9
1.9
2.0
5.0
150
800
1200
85
110
115
160
140
210
1.1
2.6
2.0
5.0
150
800
1200
100
120
120
175
140
230
Unit
1.2
ps
ps
ps
ps
90
ps
ps
ps
ps
1.2
3.3
2.0
5.0
150
800
1200
100
120
130
190
165
250
ps
mV
ps
NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit
board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared
operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit
values are applied individually under normal operating conditions and not valid simultaneously.
14. Measured using a 750 mV source, 50% duty cycle clock source. All loading with 50 W to VCC − 2.0 V.
15. Specification limits represent the amount of delay added with the assertion of each individual delay control pin. The various combinations
of asserted delay control inputs will typically realize D0 resolution steps across the specified programmable range.
16. Deviation from a linear delay (actual Min to Max) in the 1024 programmable steps.
17. For NLIN, Max temperature is 70°C.
18. Duty cycle skew guaranteed only for differential operation measured from the cross point of the input to the cross point of the output.
19. This setup time defines the amount of time prior to the input signal the delay tap of the device must be set.
20. This setup time is the minimum time that EN must be asserted prior to the next transition of IN/IN to prevent an output response greater than
±75 mV to that IN/IN transition.
21. This hold time is the minimum time that EN must remain asserted after a negative going IN or positive going IN to prevent an output response
greater than ±75 mV to that IN/IN transition.
22. This release time is the minimum time that EN must be deasserted prior to the next IN/IN transition to ensure an output response that meets
the specified IN to Q propagation delay and transition times.
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10
MC100EP196B
IN
VINPP = VIH(D) − VIL(D)
IN
Q
VOUTPP = VOH(Q) − VOL(Q)
Q
tPHL
tPLH
Figure 5. AC Reference Measurement
Using the FTUNE Analog Input
The analog FTUNE pin on the EP196 device is intended
to add more delay in a tunable gate to enhance the 10 ps
resolution capabilities of the fully digital EP196. The level
of resolution obtained is dependent on the voltage applied to
the FTUNE pin.
To provide this further level of resolution, the FTUNE pin
must be capable of adjusting the additional delay finer than
the 10 ps digital resolution (See Logic Diagram). This
requirement is easily achieved because a 60 ps additional
delay can be obtained over the entire FTUNE voltage range
(See Figure 6). This extra analog range ensures that the
FTUNE pin will be capable even under worst case
conditions of covering a digital resolution. Typically, the
analog input will be driven by an external DAC to provide
a digital control with very fine analog output steps. The final
resolution of the device will be dependent on the width of the
DAC chosen.
To determine the voltage range necessary for the FTUNE
input, Figure 6 should be used. There are numerous voltage
ranges which can be used to cover a given delay range; users
are given the flexibility to determine which one best fits their
designs.
90
80
VCC = 0 V
VEE = −3.3 V
25°C
70
−40°C
DELAY (ps)
60
50
40
30
20
85°C
10
0
−10
−3.3 −2.97 −2.64 −2.31 −1.98 −1.65 −1.32 −0.99
VEE
FTUNE VOLTAGE (V)
−0.66 −0.33
0
VCC
Figure 6. Typical EP196B Delay versus FTUNE Voltage
Cascading Multiple EP196Bs
To increase the programmable range of the EP196B,
internal cascade circuitry has been included. This circuitry
allows for the cascading of multiple EP196Bs without the
need for any external gating. Furthermore, this capability
requires only one more address line per added EP196B.
Obviously, cascading multiple programmable delay chips
will result in a larger programmable range: however, this
increase is at the expense of a longer minimum delay.
Figure 7 illustrates the interconnect scheme for cascading
two EP196Bs. As can be seen, this scheme can easily be
expanded for larger EP196B chains. The D10 input of the
EP196B is the CASCADE control pin. With the
interconnect scheme of Figure 7 when D10 is asserted, it
signals the need for a larger programmable range than is
achievable with a single device and switches output pin
CASCADE HIGH and pin CASCADE LOW. The A11
address can be added to generate a cascade output for the
next EP196B. For a 2−device configuration, A11 is not
required.
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11
MC100EP196B
Need if Chip #3 is used
ADDRESS BUS
A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
D7
D6
D5
D4
VEE
D3
D2
D7
D6
D5
D4
VEE
D3
D2
D1
VEE
D8
VEE
D9
D0
D9
D0
VCC
D10
Q
VCC
VEF
NC
VCF
CHIP #1
VCC
Figure 7. Cascading Interconnect Architecture
http://onsemi.com
VCC
NC
EN
VBB
CASCADE
VCC
12
Q
CASCADE
IN
VCC
CASCADE
CASCADE
VCC
SETMAX
LEN
VEE
VCF
SETMIN
VEF
Q
EN
CHIP #2
VBB
IN
SETMAX
IN
Q
SETMIN
IN
VCC
EP196B
LEN
EP196B
VEE
D10
INPUT
D1
D8
OUTPUT
MC100EP196B
(1111111111 on the A0—A9 address bus) D10 will be
asserted to signal the need to cascade the delay to the next
EP196B device. When D10 is asserted, the SET MIN pin of
chip #2 will be deasserted and SET MAX pin asserted
resulting in the device delay to be the maximum delay.
Table 12 shows the delay time of two EP196B chips in
cascade.
To expand this cascading scheme to more devices, one
simply needs to connect the D10 pin from the next chip to
the address bus and CASCADE outputs to the next chip in
the same manner as pictured in Figure 7. The only addition
to the logic is the increase of one line to the address bus for
cascade control of the second programmable delay chip.
An expansion of the latch section of the block diagram is
pictured in Figure 8. Use of this diagram will simplify the
explanation of how the cascade circuitry works. When D10
of chip #1 in Figure 7 is LOW this device’s
CASCADE output will also be low while the CASCADE
output will be high. In this condition the SET MIN pin of
chip #2 will be asserted HIGH and thus all of the latches of
chip #2 will be reset and the device will be set at its minimum
delay.
Chip #1, on the other hand, will have both SET MIN and
SET MAX deasserted so that its delay will be controlled
entirely by the address bus A0—A9. If the delay needed is
greater than can be achieved with 1023 gate delays
TO SELECT MULTIPLEXERS
SET
MIN
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
D0 Q0
D1 Q1
D2 Q2
D3 Q3
D4 Q4
D5 Q5
D6 Q6
D7 Q7
D8 Q8
D9 Q9
LEN
LEN
LEN
LEN
LEN
LEN
LEN
LEN
LEN
LEN
Set Reset
Set Reset
Set Reset
Set Reset
Set Reset
Set Reset
Set Reset
Set Reset
Set Reset
Set Reset
SET
MAX
Figure 8. Expansion of the Latch Section of the EP196B Block Diagram
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13
MC100EP196B
Table 12. Delay Value of Two EP196B Cascaded
VARIABLE INPUT TO CHIP #1 AND SETMIN FOR CHIP #2
INPUT FOR CHIP #1
Total
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Delay Value
Delay Value
0
0
0
0
0
0
0
0
0
0
0
0 ps
4400 ps
0
0
0
0
0
0
0
0
0
0
1
10 ps
4410 ps
0
0
0
0
0
0
0
0
0
1
0
20 ps
4420 ps
0
0
0
0
0
0
0
0
0
1
1
30 ps
4430 ps
0
0
0
0
0
0
0
0
1
0
0
40 ps
4440 ps
0
0
0
0
0
0
0
0
1
0
1
50 ps
4450 ps
0
0
0
0
0
0
0
0
1
1
0
60 ps
4460 ps
0
0
0
0
0
0
0
0
1
1
1
70 ps
4470 ps
0
0
0
0
0
0
0
1
0
0
0
80 ps
4480 ps
0
0
0
0
0
0
1
0
0
0
0
160 ps
4560 ps
0
0
0
0
0
1
0
0
0
0
0
220 ps
4720 ps
0
0
0
0
1
0
0
0
0
0
0
640 ps
5040 ps
0
0
0
1
0
0
0
0
0
0
0
1280 ps
5680 ps
0
0
1
0
0
0
0
0
0
0
0
2560 ps
6960 ps
0
1
0
0
0
0
0
0
0
0
0
5120 ps
9520 ps
0
1
1
1
1
1
1
1
1
1
1
10230 ps
14630 ps
VARIABLE INPUT TO CHIP #1 AND SETMAX FOR CHIP #2
INPUT FOR CHIP #1
Total
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
1
0
0
0
0
0
0
0
0
0
0
10240 ps
14640 ps
1
0
0
0
0
0
0
0
0
0
1
10250 ps
14650 ps
1
0
0
0
0
0
0
0
0
1
0
10260 ps
14660 ps
1
0
0
0
0
0
0
0
0
1
1
10270 ps
14670 ps
1
0
0
0
0
0
0
0
1
0
0
10280 ps
14680 ps
1
0
0
0
0
0
0
0
1
0
1
10290 ps
14690 ps
1
0
0
0
0
0
0
0
1
1
0
10300 ps
14700 ps
1
0
0
0
0
0
0
0
1
1
1
10310 ps
14710 ps
1
0
0
0
0
0
0
1
0
0
0
10320 ps
14720 ps
1
0
0
0
0
0
1
0
0
0
0
10400 ps
14800 ps
1
0
0
0
0
1
0
0
0
0
0
10560 ps
14960 ps
1
0
0
0
1
0
0
0
0
0
0
10880 ps
15280 ps
1
0
0
1
0
0
0
0
0
0
0
11520 ps
15920 ps
1
0
1
0
0
0
0
0
0
0
0
12800 ps
17200 ps
1
1
0
0
0
0
0
0
0
0
0
15360 ps
19760 ps
1
1
1
1
1
1
1
1
1
1
1
20470 ps
24870 ps
http://onsemi.com
14
Delay Value
Delay Value
MC100EP196B
Multi−Channel Deskewing
be sent through each EP196B as shown in Figure 9. One signal
channel can be used as reference and the other EP196Bs can
be used to adjust the delay to eliminate the timing skews.
Nearly any high−speed system can be fine−tuned (as small as
10 ps) to reduce the skew to extremely tight tolerances.
The most practical application for EP196B is in multiple
channel delay matching. Slight differences in impedance and
cable length can create large timing skews within a high−speed
system. To deskew multiple signal channels, each channel can
EP196B
IN
IN
Q
Q
#1
EP196B
IN
IN
Q
Q
#2
EP196B
IN
IN
Q
Q
#N
Control
Logic
Digital
Data
Figure 9. Multiple Channel Deskewing Diagram
Measure Unknown High Speed Device Delays
If the programmed delay through the second EP196B is too
long, the flip−flop output will be at logic high. On the other
hand, if the programmed delay through the second EP196B is
too short, the flip−flop output will be at a logic low. If the
programmed delay is correctly fine−tuned in the second
EP196B, the flip−flop will bounce between logic high and
logic low. The digital code in the second EP196B can be
directly correlated into an accurate device delay.
EP196Bs provide a possible solution to measure the
unknown delay of a device with a high degree of precision.
By combining two EP196Bs and EP31 as shown in Figure
10, the delay can be measured. The first EP196B can be set
to SETMIN and its output is used to drive the unknown delay
device, which in turn drives the input of a D flip−flop of
EP31. The second EP196B is triggered along with the first
EP196B and its output provides a clock signal for EP31.
The programmed delay of the second EP196B is varied to
detect the output edge from the unknown delay device.
EP196B
CLOCK
IN
IN
CLOCK
Q
Q
Unknown Delay
Device
#1
D
Q
EP31
CLK
EP196B
IN
IN
Q
Q
#2
Control
Logic
Figure 10. Multiple Channel Deskewing Diagram
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15
Q
MC100EP196B
Zo = 50 W
Q
D
Receiver
Device
Driver
Device
Q
D
Zo = 50 W
50 W
50 W
VTT
VTT = VCC − 2.0 V
Figure 11. Typical Termination for Output Driver and Device Evaluation
(See Application Note AND8020/D − Termination of ECL Logic Devices.)
ORDERING INFORMATION
Package
Shipping†
MC100EP196BFA
LQFP−32
250 Units / Tray
MC100EP196BFAG
LQFP−32
(Pb−Free)
250 Units / Tray
MC100EP196BFAR2
LQFP−32
2000 / Tape & Reel
MC100EP196BFAR2G
LQFP−32
(Pb−Free)
2000 / Tape & Reel
MC100EP196BMNG
QFN−32
(Pb−Free)
74 Units / Rail
MC100EP196BMNR4G
QFN−32
(Pb−Free)
1000 / Tape & Reel
Device
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
Resource Reference of Application Notes
AN1405/D
− ECL Clock Distribution Techniques
AN1406/D
− Designing with PECL (ECL at +5.0 V)
AN1503/D
− ECLinPSt I/O SPiCE Modeling Kit
AN1504/D
− Metastability and the ECLinPS Family
AN1568/D
− Interfacing Between LVDS and ECL
AN1672/D
− The ECL Translator Guide
AND8001/D
− Odd Number Counters Design
AND8002/D
− Marking and Date Codes
AND8020/D
− Termination of ECL Logic Devices
AND8066/D
− Interfacing with ECLinPS
AND8090/D
− AC Characteristics of ECL Devices
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16
MC100EP196B
PACKAGE DIMENSIONS
A1
A
32
−T−, −U−, −Z−
32 LEAD LQFP
CASE 873A−02
ISSUE C
4X
25
0.20 (0.008) AB T-U Z
1
AE
−U−
−T−
B
P
V
17
8
BASE
METAL
DETAIL Y
V1
AC T-U Z
AE
DETAIL Y
ÉÉ
ÉÉ
ÉÉ
ÉÉ
−Z−
9
S1
4X
0.20 (0.008) AC T-U Z
F
S
8X
G
−AB−
J
R
DETAIL AD
−AC−
H
W
K
X
DETAIL AD
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Q_
0.250 (0.010)
0.10 (0.004) AC
17
D
SECTION AE−AE
C E
GAUGE PLANE
SEATING
PLANE
M_
M
N
9
0.20 (0.008)
B1
MC100EP196B
PACKAGE DIMENSIONS
QFN32 5*5*1 0.5 P
CASE 488AM−01
ISSUE O
PIN ONE
LOCATION
2X
ÉÉ
ÉÉ
0.15 C
2X
A
B
D
NOTES:
1. DIMENSIONS AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM TERMINAL
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
E
DIM
A
A1
A3
b
D
D2
E
E2
e
K
L
TOP VIEW
0.15 C
(A3)
0.10 C
A
32 X
0.08 C
C
L
32 X
9
D2
SEATING
PLANE
A1
SIDE VIEW
MILLIMETERS
MIN
NOM MAX
0.800 0.900 1.000
0.000 0.025 0.050
0.200 REF
0.180 0.250 0.300
5.00 BSC
2.950 3.100 3.250
5.00 BSC
2.950 3.100 3.250
0.500 BSC
0.200
−−−
−−−
0.300 0.400 0.500
SOLDERING FOOTPRINT*
EXPOSED PAD
16
K
5.30
32 X
17
3.20
8
32 X
E2
1
0.63
24
32
25
32 X b
0.10 C A B
e
3.20 5.30
0.05 C
BOTTOM VIEW
32 X
0.28
28 X
0.50 PITCH
DIMENSIONS: MILLIMETERS
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
ECLinPS is a trademark of Semiconductor Components Industries, LLC.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
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MC100EP196B/D