Page 1
SEMICONDUCTOR TECHNICAL DATA
1
REV 0.1
Motorola, Inc. 1997
2/97
The MC100EP221 is a low skew 1–to–20 differential driver, designed
with clock distribution in mind. It accepts two clock sources into an input
multiplexer. The input signals can be either differential or single–ended if
the VBB output is used. The selected signal is fanned out to 20 identical
differential outputs.
• 150ps Part–to–Part Skew
• 50ps Output–to–Output Skew
• Differential Design
• V
BB
Output
• Voltage and Temperature Compensated Outputs
• Low Voltage V
EE
Range of –2.375 to –3.8V
• 75kΩ Input Pulldown Resistors
The EP221 is specifically designed, modeled and produced with low
skew as the key goal. Optimal design and layout serve to minimize gate–
to–gate skew within a device, and empirical modeling is used to
determine process control limits that ensure consistent tpd distributions
from lot to lot. The net result is a dependable, guaranteed low skew
device.
To ensure that the tight skew specification is met it is necessary that
both sides of the differential output are terminated into 50Ω, even if only
one side is being used. In most applications, all ten differential pairs will
be used and therefore terminated. In the case where fewer than ten pairs
are used, it is necessary to terminate at least the output pairs on the same
package side as the pair(s) being used on that side, in order to maintain
minimum skew. Failure to do this will result in small degradations of
propagation delay (on the order of 10–20ps) of the output(s) being used
which, while not being catastrophic to most designs, will mean a loss of
skew margin.
The MC100EP221, as with most other ECL devices, can be operated from a positive VCC supply in PECL mode. This allows
the EP221 to be used for high performance clock distribution in +3.3V or +2.5V systems. Designers can take advantage of the
EP221’s performance to distribute low skew clocks across the backplane. In a PECL environment, series or Thevenin line
terminations are typically used as they require no additional power supplies. For more information on using PECL, designers
should refer to Motorola Application Note AN1406/D.
This document contains information on a product under development. Motorola reserves the right to change or
discontinue this product without notice.
LOW–VOL TAGE
1:20 DIFFERENTIAL
ECL/PECL CLOCK DRIVER
FA SUFFIX
52–LEAD TQFP PACKAGE
CASE 848D–03
Page 2
MC100EP221
MOTOROLA TIMING SOLUTIONS
BR1333 — Rev 6
2
PIN NAMES
Function
Differential Input Pairs
Differential Outputs
Active Clock Select Input
VBB Output
Pins
CLKn, CLKn
Q0:19, Q0:19
CLK_SEL
VBB
FUNCTION
Active Input
CLK0, CLK0
CLK1, CLK1
CLK_SEL
0
1
LOGIC SYMBOL
Q0
Q0
0
1
CLK0
CLK0
CLK1
CLK1
CLK_SEL
Pinout: 52–Lead TQFP
(Top View)
Q1:18
Q1:18
Q19
Q19
16
VCCO
Q5B
Q5
Q4B
Q4
Q3B
Q3
Q2B
Q2
Q1B
Q1
Q0B
Q0
Q12
Q12B
Q13
Q13B
Q14
Q14B
Q15
Q15B
Q16
Q16B
Q17
Q17B
VCCO
Q6
Q6BQ7Q7BQ8Q8BQ9Q9B
Q10
Q10B
Q11
Q11B
VCCO
VCC
VCCO
CLKSEL
CLK0
CLK0B
VBB
CLK1
CLK1B
VEE
Q19B
Q19
Q18B
Q18
40
41
42
43
44
45
46
47
48
49
50
51
52
25
24
23
22
21
20
19
18
17
16
15
14
12345678910111213
39 38 37 36 35 34 33 32 31 30 29 28 27
26
MC100EP211
Page 3
MC100EP221
TIMING SOLUTIONS
BR1333 — Rev 6
3 MOTOROLA
ECL DC CHARACTERISTICS
–40°C 0°C 25°C 85°C
Symbol Characteristic Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit
V
OH
Output HIGH Voltage –1.025 –0.955 –0.880 –1.025 –0.955 –0.880 –1.025 –0.955 –0.880 –1.025 –0.955 –0.880 V
V
OL
Output LOW Voltage –1.810 –1.705 –1.620 –1.810 –1.705 –1.620 –1.810 –1.705 –1.620 –1.810 –1.705 –1.620 V
V
IH
Input HIGH Voltage –1.165 –0.880 –1.165 –0.880 –1.165 –0.880 –1.165 –0.880 V
V
IL
Input LOW Voltage –1.810 –1.475 –1.810 –1.475 –1.810 –1.475 –1.810 –1.475 V
V
BB
Output Reference
Voltage
–1.38 –1.26 –1.38 –1.26 –1.38 –1.26 –1.38 –1.26 V
V
EE
Power Supply Voltage –2.375 –3.8 –2.375 –3.8 –2.375 –3.8 –2.375 –3.8 V
I
IH
Input HIGH Current 150 150 150 150 µA
I
EE
Power Supply Current mA
PECL DC CHARACTERISTICS
–40°C 0°C 25°C 85°C
Symbol Characteristic Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit
V
OH
Output HIGH Voltage
(NO TAG)
2.275 2.345 2.420 2.275 2.345 2.420 2.275 2.345 2.420 2.275 2.345 2.420 V
V
OL
Output LOW Voltage
(NO TAG)
1.490 1.595 1.680 1.490 1.595 1.680 1.490 1.595 1.680 1.490 1.595 1.680 V
V
IH
Input HIGH Voltage
(NO TAG)
2.135 2.420 2.135 2.420 2.135 2.420 2.135 2.420 V
V
IL
Input LOW Voltage
(NO TAG)
1.490 1.825 1.490 1.825 1.490 1.825 1.490 1.825 V
V
BB
Output Reference
Voltage (Note NO TAG)
1.92 2.04 1.92 2.04 1.92 2.04 1.92 2.04 V
V
CC
Power Supply Voltage 2.375 3.8 2.375 3.8 2.375 3.8 2.375 3.8 V
I
IH
Input HIGH Current 150 150 150 150 µA
I
EE
Power Supply Current mA
1. These values are for VCC = 3.3V . Level Specifications will vary 1:1 with VCC.
AC CHARACTERISTICS (VEE = VEE (min) to VEE (max); VCC = V
CCO
= GND)
–40°C 0°C 25°C 85°C
Symbol Characteristic Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit Condition
t
PLH
t
PHL
Propagation Delay to Output
IN (differential)
IN (single–ended)
500
500
ps
t
skew
Within–Device Skew
Part–to–Part Skew (Diff)
50
150
50
150
50
150
50
150
ps
f
max
Maximum Input Frequency 1.5 1.5 1.5 1.5 GHz
V
PP
Minimum Input Swing 500 500 500 500 mV
V
CMR
Common Mode Range V
tr/t
f
Output Rise/Fall Time 200 200 200 200 ps 20%–80%
Page 4
MC100EP221
MOTOROLA TIMING SOLUTIONS
BR1333 — Rev 6
4
OUTLINE DIMENSIONS
FA SUFFIX
PLASTIC TQFP PACKAGE
CASE 848D–03
ISSUE C
F
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M,
1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DATUM PLANE –H– IS LOCATED AT BOTTOM OF LEAD AND
IS COINCIDENT WITH THE LEAD WHERE THE LEAD EXITS
THE PLASTIC BODY AT THE BOTTOM OF THE PARTING
LINE.
4. DATUMS –L–, –M– AND –N– TO BE DETERMINED AT DATUM
PLANE –H–.
5. DIMENSIONS S AND V TO BE DETERMINED AT SEATING
PLANE –T–.
6. DIMENSIONS A AND B DO NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE PROTRUSION IS 0.25 (0.010)
PER SIDE. DIMENSIONS A AND B DO INCLUDE MOLD
MISMATCH AND ARE DETERMINED AT DATUM PLANE -H-.
7. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION.
DAMBAR PROTRUSION SHALL NOT CAUSE THE LEAD
WIDTH TO EXCEED 0.46 (0.018). MINIMUM SPACE
BETWEEN PROTRUSION AND ADJACENT LEAD OR
PROTRUSION 0.07 (0.003).
VIEW AA
VIEW AA
2 X R R1
AB
AB
VIEW Y
SECTION AB–AB
ROTATED 90_ CLOCKWISE
DIMAMIN MAX MIN MAX
INCHES
10.00 BSC 0.394 BSC
MILLIMETERS
A1 5.00 BSC 0.197 BSC
B 10.00 BSC 0.394 BSC
B1 5.00 BSC 0.197 BSC
C ––– 1.70 ––– 0.067
C1 0.05 0.20 0.002 0.008
C2 1.30 1.50 0.051 0.059
D 0.20 0.40 0.008 0.016
E 0.45 0.030
F 0.22 0.35 0.009 0.014
G 0.65 BSC
0.75 0.018
0.026 BSC
J 0.07 0.20 0.003 0.008
K 0.50 REF 0.020 REF
R1 0.08 0.20 0.003 0.008
S 12.00 BSC 0.472 BSC
S1 6.00 BSC 0.236 BSC
U 0.09 0.16 0.004 0.006
V 12.00 BSC 0.472 BSC
V1 6.00 BSC 0.236 BSC
W 0.20 REF 0.008 REF
Z 1.00 REF 0.039 REF
C
L
–X–
X=L, M, N
1
13
14
26
27
39
4052
4X TIPS
4X
N0.20 (0.008) H L–M N0.20 (0.008) T L–M
3X VIEW Y
SEATING
PLANE
C
0.10 (0.004) T
4X θ3
4X θ2
S
0.05 (0.002)
0.25 (0.010)
GAGE PLANE
C2
C1
W
K
E
Z
S
L–M
M
0.13 (0.005) N
S
T
PLATING
BASE METAL
D
J
U
B V
B1
A
S
V1
A1
S1
–L–
–N–
–M–
–H–
–T–
θ1
θ
G
θ
1
θ
θ
3
θ
2
07
__
12
513
_
_
_
07
__
0
_
0
_
––– –––
REF
12
_
REF
13
_
5
_
Page 5
MC100EP221
TIMING SOLUTIONS
BR1333 — Rev 6
5 MOTOROLA
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
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. Motorola does not convey any license under its patent rights nor the rights of
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How to reach us:
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MC100EP221/D
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