SY89809LTHTR データシートの表示（PDF） - Micrel
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SY89809LTHTR Datasheet PDF : 8 Pages
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Micrel, Inc.
SY89809L
Pin Description
Pin Number
2, 3
Pin Name
HSTL_CLK,
/HSTL_CLK
5, 6
LVPECL_CLK,
/LVPECL_CLK
4
CLK_SEL
8
OE
31, 29, 27,
23, 21, 19,
15, 13, 11
30, 28, 26,
22, 20, 18,
14, 12, 10
1
9, 16, 17,
24, 25, 32
7
Q0 – Q8
/Q0 – /Q8
VCCI
VCCO
GND
Type
HSTL Input
LVPECL
Input
LVTTL Input
LVTTL Input
HSTL Output
HSTL Output
VCC Core
Power
VCC Output
Power
Ground
Pin Function
Differential input: This HSTL input can be selected by CLK_SEL. If it is not
used, it can be left floating. This produces a LOW at the output. If driven by an
HSTL driver, an external 50Ω to ground termination is required at the input.
Differential input: This LVPECL input can be selected by CLK_SEL. If it is not
used, it can be left floating. This produces a LOW at the output (internal 75kΩ
pull-downs).
Selected HSTL_CLK input when LOW and LVPECL_CLK output when HIGH.
11kΩ pull-up.
Single-ended input: This LVTTL input disables and enables the Q0-Q8 output
pairs. It is internally synchronized to prevent glitching of the Q0-Q8 output
pairs. It is internally connected to a 11kΩ pull-up resistor and will default to a
logic HIGH state if left open.
Differential clock outputs from HSTL_CLK when CLK_SEL = LOW and
LVPECL outputs when CLK_SEL = HIGH. HSTL outputs must be terminated
with 50Ω to GND. Q0-Q8 outputs are static LOW when OE = LOW. Unused
output pairs may be left floating.
Differential clock outputs from HSTL_CLK when CLK_SEL = LOW and
LVPECL outputs when CLK_SEL = HIGH. HSTL outputs must be terminated
with 50Ω to GND. /Q0-/Q8 outputs are static HIGH when OE = LOW. Unused
output pairs may be left floating.
Core VCC connected to 3.3V supply. Bypass with 0.1µF in parallel with 0.01µF
low ESR capacitors as close to VCCI pin as possible.
Output Buffer VCC connected to 1.8V supply. Bypass with 0.1µF in parallel
with 0.01µF low ESR capacitors as close to VCCO pins as possible. All VCCO
pins should be connected together on the PCB.
Ground.
December 2009
3
M9999-121409-D
hbwhelp@micrel.com or (408) 955-1690
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