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Micrel Semiconductor
Micrel Semiconductor

SY89809L Datasheet Preview

SY89809L Datasheet

3.3V 1:9 HIGH-PERFORMANCE / LOW-VOLTAGE BUS CLOCK DRIVER

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SY89809L pdf
3.3V 1:9 HIGH-PERFORMANCE,
LOW-VOLTAGE
BUS CLOCK DRIVER
ClockWorks™
SY89809L
FEATURES
s 3.3V core supply, 1.8V output supply for reduced
power
s LVPECL and HSTL inputs
s 9 differential HSTL (low-voltage swing) output pairs
s HSTL outputs drive 50to ground with no
offset voltage
s 500MHz maximum clock frequency
s Low part-to-part skew (200ps max.)
s Low pin-to-pin skew (50ps max.)
s Available in 32-pin TQFP package
PIN CONFIGURATION
VCCI
HSTL_CLK
HSTL_CLK
CLK_SEL
LVPECL_CLK
LVPECL_CLK
GND
OE
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4
Top View
21
5
TQFP
T32-1
20
6 19
7 18
8 17
9 10 11 12 13 14 15 16
VCCO
Q3
Q3
Q4
Q4
Q5
Q5
VCCO
DESCRIPTION
The SY89809L is a High-Performance Bus Clock Driver
with 9 differential HSTL (High-Speed Transceiver Logic)
output pairs. The part is designed for use in low-voltage
(3.3V/1.8V) applications which require a large number of
outputs to drive precisely aligned, ultralow skew signals to
their destination. The input is multiplexed from either HSTL
or LVPECL (Low-Voltage Positive-Emitter-Coupled Logic)
by the CLK_SEL pin. The Output Enable (OE) is
synchronous so that the outputs will only be enabled/
disabled when they are already in the LOW state. This
avoids any chance of generating a runt clock pulse when
the device is enabled/disabled as can happen with an
asynchronous control.
The SY89809L features low pin-to-pin skew (50ps max.)
and low part-to-part skew (200ps max.)—performance
previously unachievable in a standard product having such
a high number of outputs. The SY89809L is available in a
single space saving package, enabling a lower overall cost
solution.
APPLICATIONS
s High-performance PCs
s Workstations
s Parallel processor-based systems
s Other high-performance computing
s Communications
PIN NAMES
Pin
HSTL_CLK, /HSTL_CLK
LVPECL_CLK, /LVPECL_CLK
CLK_SEL
OE
Q0-Q8, /Q0-/Q8
GND
VCCI
VCCO
Function
Differential HSTL Inputs
Differential LVPECL Inputs
Input CLK Select (LVTTL)
Output Enable (LVTTL)
Differential HSTL Outputs
Ground
VCC Core
VCC Output
LOGIC SYMBOL
CLK_SEL
HSTL_CLK
HSTL_CLK
0
LVPECL_CLK
LVPECL_CLK
OE
1
LEN
Q
D
9
Q0 Q8
9
Q0 Q8
Rev.: A Amendment: /0
1 Issue Date: March 2000



Micrel Semiconductor
Micrel Semiconductor

SY89809L Datasheet Preview

SY89809L Datasheet

3.3V 1:9 HIGH-PERFORMANCE / LOW-VOLTAGE BUS CLOCK DRIVER

No Preview Available !

SY89809L pdf
Micrel
TRUTH TABLE
OE(1)
0
CLK_SEL
0
Q0 Q8
LOW
/Q0 /Q8
HIGH
0
1
LOW
HIGH
1
0
HSTL_CLK
/HSTL_CLK
1 1 LVPECL_CLK /LVPECL_CLK
NOTE:
1. The OE (output enable) signal is synchronized with the low level of the
HSTL_CLK and LVPECL_CLK signal.
ClockWorks
SY89809L
SIGNAL GROUPS
Level
HSTL
HSTL
LVPECL
LVCMOS/LVTTL
Direction
Input
Output
Input
Input
Signal
HSTL_CLK, /HSTL_CLK
Q0 Q8, /Q0 /Q8
LVPECL_CLK, /LVPECL_CLK
CLK_SEL, OE
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
Value
Unit
VCCI, VCCO
VIN
IOUT
Tstore
VCC Pin Potential to Ground Pin
Input Voltage
DC Output Current (Output HIGH)
Storage Temperature
0.5 to +4.0
0.5 to VCCI
50
65 to +150
V
V
mA
°C
NOTE:
1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation is not
implied at conditions other than those detailed in the operational sections of this data book. Exposure to ABSOLUTE MAXIMUM RATING conditions
for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
Power Supply
Symbol
VCCI
VCCO
ICCI
Parameter
VCC Core
VCC Output
ICC Core
TA = 0°C
Min. Typ. Max.
3.0 3.3 3.6
1.6 1.8 2.0
115 140
TA = +25°C
Min. Typ. Max.
3.0 3.3 3.6
1.6 1.8 2.0
115 140
TA = +70°C
Min. Typ. Max.
3.0 3.3 3.6
1.6 1.8 2.0
115 140
Unit
V
V
mA
HSTL
Symbol
Parameter
VOH Output HIGH Voltage(1)
VOL Output LOW Voltage(1)
VIH Input HIGH Voltage
VIL Input LOW Voltage
VX Input Crossover Voltage
IIH Input HIGH Current
IIL Input LOW Current
NOTE:
1. Outputs loaded with 50to ground.
TA = 0°C
Min. Typ. Max.
TA = +25°C
Min. Typ. Max.
TA = +70°C
Min. Typ. Max. Unit
1.0 1.2 1.0 1.2 1.0 1.2 V
0
0.4
0
0.4
0
0.4 V
VX +0.1 1.6 VX +0.1 1.6 VX +0.1 1.6 V
0.3
VX 0.1 0.3
VX 0.1 0.3
VX 0.1 V
0.68 0.9 0.68 0.9 0.68 0.9 V
+20 — –350 +20 — –350 +20 — –350 µA
— — –500 — — –500 — — –500 µA
2


Part Number SY89809L
Description 3.3V 1:9 HIGH-PERFORMANCE / LOW-VOLTAGE BUS CLOCK DRIVER
Maker Micrel Semiconductor
Total Page 4 Pages
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