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SK10/100EL14W
1:5 Clock Distribution Chip
HIGH-PER.ORMANCE PRODUCTS Description
The SK10/100EL14W is a 1:5 Clock Distribution Chip designed specifically for low skew clock distribution applications. This device is fully compatible with MC100EL14 and MC100LVEL14. The device can be driven by either differential or singleended ECL/PECL input signals. The SK10/100EL14W provides a VBB output for either single-ended use or DC bias for AC coupling to the device. VBB is an output pin and should be used as a bias for the EL14W as its current sink/source capability is limited. Whenever used, VBB should be bypassed to VCC via a 0.01 F capacitor. The EL14W features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. When LOW (or left open and pulled LOW by the input pulldown resistor) the SEL pin will select the differential clock input. The Common Enable pin (EN*) is synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids the chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous control. The internal flipflops are clocked on the falling edge of the input clock; therefore, all associated specification limits are referenced to the negative edge of the clock input.
.eatures
* Extended Supply Voltage Range: (VEE = -5.5V to -3.0V, VCC = 0V) or (VCC = + 3.0V to +5.5V, VEE=0V) High Bandwidth Output Transition Max. 50 ps Output-to-Output Skew (Typ. 30 ps) VBB Output Synchronous Enable/Disable Multiplexed Clock Input 75 K Internal Input Pulldown Resistors New Differential Input Common Mode Range Fully Compatible with MC100EL14 and MC100LVEL14 ESD Protection of >4000 V Industrial Temperature Range: -40oC to +85oC Available in 20-Pin SOIC (150 mils) Package
* * * * * * * * * * *
Pin Descriptions
Pin CLK, CLK* SCLK EN* SEL .unction Differential Clock Inputs Scan Clock Input Sync Enable Clock Select Input Reference Output Voltage Differential Clock Outputs
.unctional Block Diagram
Q0 Q0* Q1 Q1* Q2 Q2* Q3 Q3* Q4 Q4* 1 2 3 4 5 6 7 8 9 10 1 0 14 13 12 11 CLK* VBB SEL VEE 20 19 18 17 VCC EN* VCC NC
VBB Q0-Q4, Q0*-Q4*
Function Table
CLK L H X X X SCLK X X L H X SEL L L H H X EN* L L L L H Q L H L H L*
QD
16 SCLK 15 CLK
* On next negative transition of CLK or SCLK
Revision 1/February 12, 2001
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SK10/100EL14W
HIGH-PER.ORMANCE PRODUCTS Package Information
20 Pin SOIC Package
PIN Descriptions
20
-A
11
-B
P
10 X 0.010 (0.25) M B M
R x 45
D
20 X
0.010 (0.25)
M
T
A
S
B
S
C -T G 18 X K
SEATING PLANE
Millimeters
MILLIMETERS DIM A A1 B C D E e H h L MIN 1.35 0.10 0.33 0.19 4.80 3.80 MAX 1.75 0.25 0.51 0.25 5.00 4.00
1.27 BSC 5.80 0.25 0.40 0o 6.20 0.50 1.27 8o
NOTES: 1. Dimensions and tolerances per ANSI Y14.5M, 1982. 2. Controlling dimension: millimeter. 3. Dimensions A and B do not include mold protrusion. 4. Maximum mold protrusion 0.150 (0.006) per side. 5. Dimension D does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.13 (0.005) total in excess of d dimension at maximum material condition.
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SK10/100EL14W
HIGH-PER.ORMANCE PRODUCTS DC Characteristics
SK10/100EL14W DC Electrical Characteristics (Notes 1, 2)
(VCC - VEE = +3.0V to +5.5V ; VOUT loaded 50 to VCC - 2.0V)
TA = -40oC
Symbol IEE Characteristic Power Supply current 10EL 100EL Output Reference Voltage3
10EL 100EL
TA = 0oC
Min 23 23 Typ 30 30 Max 39 40 Min 24 24
TA = +25oC
Typ 30 31 Max 40 41 Min 25 27
TA = +85oC
Typ 32 34 Max 42 46 Unit mA mA
Min 22 22
Typ 28 28
Max 38 38
VBB IIN
- 1.43 - 1.38 - 150
- 1.30 - 1.26 150 150
- 1.38 - 1.38 - 150
- 1.27 - 1.26 150 150
- 1.35 - 1.38 - 150
- 1.25 - 1.26 150 150
-1.31 -1.38 - 150
-1.19 -1.26 150 150
V V A A
Input Current (Diff) (SE)
AC Characteristics
SK10/100EL14W AC Electrical Characteristics
(VCC - VEE = +3.0V to +5.5V ; VOUT loaded 50 to VCC - 2.0V)
TA = -40oC
Symbol tPLH tPHL tskew tS tH VPP VCMR Characteristic Propagation Delay CLK to Q (Diff) CLK to Q (SE) SCLK to Q Par t-to-Par t Skew Within Device Skew4 Setup Time EN* Hold Time EN* Minimum Input Swing CLK5 Common Mode Range6 VPP < 500 mV VPP > 500 mV Output Rise/.all Times (20% to 80%) Q0-Q4, Q0*-Q4* 0 0 150 VEE+1.3 VEE+1.5 205 1000 VCC-0.4 VCC-0.4 355 Min 630 555 520 Max 755 710 765 200 50 0 0 150 VEE+1.3 VEE+1.5 215 1000 VCC-0.4 VCC-0.4 370
TA = 0oC
Min 650 570 550 Max 785 740 780 200 50
TA = +25oC
Min 660 580 570 Max 805 760 790 200 50 0 0 150 VEE+1.3 VEE+1.5 220 1000 VCC-0.4 VCC-0.4 380
TA = +85oC
Min 695 605 620 Max 860 815 830 200 50 0 0 150 VEE+1.3 VEE+1.5 240 1000 VCC-0.4 VCC-0.4 410 Unit Ps Ps Ps ps ps ps ps mV V V ps
tr , tf
Revision 1/February 12, 2001
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SK10/100EL14W
HIGH-PER.ORMANCE PRODUCTS AC Characteristics (continued)
Notes: 1. 10EL circuits are designed to meet the DC specifications shown in the table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and transverse airflow greater than 500 lfpm is maintained. Outputs are terminated through a 50 resistor to VCC -2.0V. 2. 100K circuits are designed to meet the DC specification shown in the table where transverse airflow greater than 500 lfpm is maintained. 3. Voltages are referenced to VCC = 0V. 4. Skews are specified for identical LOW-to-HIGH or HIGH-to-LOW transitions. 5. Minimum input swing for which AC parameters guaranteed. 6. CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the high level falls within the specified range and the peak-to-peak voltage lies between VPP(min) and 1V. The lower end of the CMR range varies 1:1 with VEE and is equal to VEE + 1.3V for VPP < 500 mV, and VEE + 1.5 for VPP > 500 mV. 7. For standard ECL DC specifications, refer to the ECL Logic Family Standard DC Specifications Data Sheet. 8. For part ordering descriptions, see HPP Part Ordering Information Data Sheet.
Ordering Information
Ordering Code SK10EL14WD SK10EL14WDT SK100EL14WD SK100EL14WDT SK10EL14WU SK100EL14WU Package ID 20-SOIC 20-SOIC 20-SOIC 20-SOIC Die Die Temperature Range Industrial Industrial Industrial Industrial
Contact Information
Division Headquarters 10021 Willow Creek Road San Diego, CA 92131 Phone: (858) 695-1808 FAX: (858) 695-2633
Semtech Corporation High-Performance Products Division
Marketing Group 1111 Comstock Street Santa Clara, CA 95054 Phone: (408) 566-8776 FAX: (408) 727-8994
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