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TEST AND MEASUREMENT PRODUCTS
Revision 1 / June 24, 2003
SK1904
1:9 Signal Distribution
VEE
SEL
SEL*
CLK
CLK*
IN
IN*
VCC
VCC
OUT3*
OUT3
OUT4
OUT4*
OUT5*
OUT5
VEE
VCC
OUT0
OUT0*
OUT1*
OUT1
OUT2
OUT2*
VEE
VEE
OUT8*
OUT8
OUT7
OUT7*
OUT6*
OUT6
VCC
Description Features
Package Information
Functional Block Diagram
1:9 Clock/Data Driver
3 GHz Fmax
3.3V / 5.2V Compatible
Available in 32 pin, 5mm X5mm, TQFP
Package
IN
IN
*
C
LK
C
LK*
S
EL*
S
E
L
OU
T
0
OU
T
0
*
OU
T
1
OU
T1*
T
OU
T2*
OU
T
3
OU
T
3
*
OU
T
4
OU
T4*
OU
T
5
OU
T
5
*
OU
T
6
OU
T
6
*
OU
T
7
OU
T7*
OU
T
8
OU
T
8
*
D
D
*
Q
Q
*
0
1
32 pin, 5 mm X 5 mm
TQFP Package
The SK1904 is an extremely fast, stable, and accurate
low skew 1:9 clock / signal distributor featuring a
synchronous enable, which allows the outputs to be
turned off and on without the risk of an unpredictable
output pulse. The D - flip-flop is triggered on the falling
edge of the clock.
The SK1904 outputs are 50Ω with source and sink
capability, optimized for:
Point to point, series terminated, timing
critical lines
Pin Description
Output Option
50Ω Source / Sink
OUT
OUT
VEE VEE
VGG
*
50Ω
50Ω
10 mA 10 mA
Revision 1 / June 24, 2003
TEST AND MEASUREMENT PRODUCTS
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SK1904
1:9 Signal Distribution
32 Pin, 5mm x 5mm TQFP Package
HIGH-PERFORMANCE PRODUCTS
Side View
e
A
A1
10 b
SEATING
PLANE
A2
8
D1, E1
24
3
D, E
See
Figure 3.
b
Top View
PRELIMINARY
Package Information
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TEST AND MEASUREMENT PRODUCTS
Revision 1 / June 24, 2003
SK1904
1:9 Signal Distribution
L
11
(L1)
R2
GAGE PLANE
25
R1
01
02
2
S
03
00
97
9
b
c
9
b1
9
c1
WITH
PLATING
e / 2
b
See Detail in
Figure 2
1. All dimensions and tolerancing conforms
to ANSI Y14.5M-1982.
2. The top package body size may be smaller
than the bottom package body size by as
much as 0.15 mm.
3. To be determined at seating plane.
4. Dimensions D1 and E1 do not include
mold protrusion. Allowable protrusion
is 0.25 mm per side. D1 and E1 are
maximum plastic body size dimensions
including mold mismatch.
5. Details of Pin 1 identifier optional, but
must be located within the zone indicated.
6. All dimensions are in millimeters.
7. Dimension b does not include Dambar
protrusion. Allowable Dambar protrusion
shall not cause the lead width to exceed
the maximum b dimension by more than
0.08 mm. Dambar cannot be located
on the lower radius or the foot. Minimum
space between protrusion and an
adjacent lead is 0.07 mm for 0.4 mm and
0.5 mm pitch packages.
8. Exact shape of each corner is optional.
9. These dimensions apply to the flat
section of the lead between 0.10 mm
and 0.25 mm from the lead tip.
10. A1 is defined as the distance from the
seating plane to the lowest point of the
package body.
Figure 1. Figure 2. Figure 3.
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JEDEC Variation
All Dimensions in Millimeters
32 Pin, 5mm x 5mm TQFP Package
HIGH-PERFORMANCE PRODUCTS
Package Information (continued)
Revision 1 / June 24, 2003
TEST AND MEASUREMENT PRODUCTS
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SK1904
1:9 Signal Distribution
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VEE V(ylppuSrewoP CC )V0=8-0ot0.V
VCC V(ylppuSrewoP EE )V0=0ot0.8+V
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ITUO
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05
001
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Am
Tgts erutarepmeTegarotS 051+ot56- oC
Tlos 542:sdnoces3ot2<(erutarepmeTredloS oC)derised562 oC
* Maximum Ratings are those values beyond which damage to the device may occur.
Absolute Maximum Ratings*
Note 1: Device is ESD sensitive and requires protective handling.
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TEST AND MEASUREMENT PRODUCTS
Revision 1 / June 24, 2003
SK1904
1:9 Signal Distribution
Note 1: Guaranteed by characterization. Not production tested.
AC Characteristics
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V
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HII
LII
5-
6-
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6+
Aµ
Aµ
)*LES/LES,*NI/NI(stupnIlanoitcnuF
tnerruCtupnILII,HII -005005+Aµ
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TUO|- |*TUO
2/)*TUO+TUO(
KNISI
TUOR
006
CCV-4.1
5.7
04
007
CCV-2.1
01
05
CCV-0.1
31
06
Vm
V
Am
Ω
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)0=LES(TUOotKLC
)1=LES(TUOotKLC
TUOotLES
dpT
dpT
dpT
584
003
003
036
054
054
587
006
006
sp
sp
sp
wekSlennahCotlennahCt
WEKS
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001
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sp
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Test Conditions: Outputs unterminated.
DC Characteristics
(VCC - VEE = 3.0V to 5.5V; TA = 0oC to 70oC)
AC TEST CONDITIONS: Outputs terminated with 50Ω to VCC -2.0V.
(VCC - VEE = 3.0V to 5.5V; TA = 0oC to 70oC)
Revision 1 / June 24, 2003
TEST AND MEASUREMENT PRODUCTS
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SK1904
1:9 Signal Distribution
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FTA4091KS PFQT-23
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Contact Information
Ordering Information
Notes:
1. For Tape and Reel information, see TMD Part Ordering Information Data
Semtech Corporation
Test and Measurement Division
10021 Willow Creek Rd., San Diego, CA 92131
Phone: (858) 695-1808 FAX: (858) 695-2633
AN1001 - EPIC Family Product Line
AN1003 - Termination Techniques for ECL / LVECL
PECL / LVPECL Devices
AN1004 - Interfacing Between LVDS and
ECL / LVECL / PECL / LVPECL
Application Notes