FS6051 American Microsystems, Inc., FS6051 Datasheet

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FS6051

Manufacturer Part Number
FS6051
Description
Low-skew Clock Fanout Buffer ic
Manufacturer
American Microsystems, Inc.
Datasheet
ISO9001
ISO9001
ISO9001
ISO9001
1.0
Figure 1: Block Diagram (FS6050)
Intel and Pentium are registered trademarks of Intel Corporation. I
tions as may be required to permit improvements in the design of its products.
CLK_IN
VDD_I
VSS_I
Generates up to eighteen low-skew, non-inverting
clocks from one clock input
Supports up to four SDRAM DIMMs
Uses either I
Read and Write capability for individual clock output
control
Output enable pin tristates all clock outputs to facili-
tate board testing
Clock outputs skew-matched to less than 250ps
Less than 5ns propagation delay
Output impedance: 17
Serial interface I/O meet I
I/O are LVTTL/LVCMOS-compatible
Five differerent pin configurations available:
SDA
SCL
OE
2
2
C
C
Features
FS6050: 18 clock outputs in a 48-pin SSOP
FS6051: 10 clock outputs in a 28-pin SOIC, SSOP
FS6053: 13 clock outputs in a 28-pin SOIC
FS6054: 14 clock outputs in a 28-pin SOIC
Interface
Serial
2
C
ä
-bus or SMBus serial interface with
18
at 0.5V
2
C specifications; all other
FS6050
DD
2
C is a licensed trademark of Philips Electronics, N.V. American Microsystems, Inc. reserves the right to change the detail specifica-
SDRAM_16
SDRAM_17
VDD
SDRAM_(0:1)
VSS
VDD
SDRAM_(2:3)
VSS
VDD
SDRAM_(4:5)
VSS
VDD
SDRAM_(6:7)
VSS
VDD
SDRAM_(8:9)
VSS
VDD
SDRAM_(10:11)
VSS
VDD
SDRAM_(12:13)
VSS
VDD
SDRAM_(14:15)
VSS
VDD
VSS
VDD
VSS
FS6050/FS6051/FS6053/FS6054
FS6050/FS6051/FS6053/FS6054
FS6050/FS6051/FS6053/FS6054
FS6050/FS6051/FS6053/FS6054
2.0
The FS6050 family of CMOS clock fanout buffer ICs are
designed for high-speed motherboard applications, such
as Intel Pentium
SDRAM.
Up to eighteen buffered, non-inverting clock outputs are
fanned-out from one clock input. Individual clocks are
skew matched to less than 250ps at 100MHz. Multiple
power and ground supplies reduce the effects of supply
noise on device performance.
Under I
turned on or off. An active-low output enable is available
to force all the clock outputs to a tristate level for system
testing.
Figure 2: Pin Configuration (FS6050)
Figure 3: Pin Configuration (FS6051)
Additional pin configurations are noted on Page 2.
2
Description
C-bus control, individual clock outputs may be
Low-Skew Clock Fanout Buffer ICs
Low-Skew Clock Fanout Buffer ICs
Low-Skew Clock Fanout Buffer ICs
Low-Skew Clock Fanout Buffer ICs
®
II PC100-based systems with 100MHz
28-pin SOIC, SSOP
48-pin SSOP
FS6050
FS6051
3.4.02

Related parts for FS6051

FS6051 Summary of contents

Page 1

... Serial interface I/O meet I C specifications; all other I/O are LVTTL/LVCMOS-compatible Five differerent pin configurations available: FS6050: 18 clock outputs in a 48-pin SSOP FS6051: 10 clock outputs in a 28-pin SOIC, SSOP FS6053: 13 clock outputs in a 28-pin SOIC FS6054: 14 clock outputs in a 28-pin SOIC Figure 1: Block Diagram (FS6050) VDD_I ...

Page 2

... Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Table 1: Pin Descriptions Key Analog Input Analog Output Digital Input Digital Output Power/Ground Active Low pin PIN (FS6050) PIN (FS6051) PIN (FS6053 ...

Page 3

... ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 3.2 Register Programming A logic-one written to a valid bit location turns on the as- signed output clock. Likewise, a logic-zero written to a valid bit location turns off the assigned output clock. Any unused or reserved register bits should be cleared to zero ...

Page 4

... OUTPUT PIN OUTPUT PIN (FS6051) (FS6053) - Pin 11 - Pin Pin 7 Pin 7 Pin 6 Pin 6 Pin 3 Pin 3 Pin 2 Pin 2 OUTPUT PIN OUTPUT PIN OUTPUT PIN (FS6051) (FS6053) Pin 27 Pin 27 Pin 26 Pin 26 Pin 23 Pin 23 Pin 22 Pin Pin 19 - Pin 18 OUTPUT PIN OUTPUT PIN OUTPUT PIN (FS6051) (FS6053) ...

Page 5

... ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 4.1.4 The state of the SDA line represents valid data if the SDA line is stable for the duration of the high period of the SCL C-bus) and the System line after a START condition occurs. The data on the SDA line must be changed only during the low period of the SCL signal ...

Page 6

... FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs 2 For an I C-bus interface, the device can support two de- vice addresses to permit multiple devices on one I The A2 address bit is ignored and can be set to either a one or a zero ...

Page 7

... REGISTER ADDRESS 7-bit Receive Register Address Device Address Acknowledge START WRITE Command Command From bus host to device ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 2 C-bus) A DATA A P Data Acknowledge STOP Condition Acknowledge From device to bus host 2 C-bus DEVICE ADDRESS ...

Page 8

... FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs 4.2.6 SMBus: Block Write The Block Write command permits the SMBus master to write several bytes of data to sequential registers, starting by default at Register 0. The ...

Page 9

... Table 8: Operating Conditions PARAMETER Supply Voltage, Clock Buffers Supply Voltage, Serial Communications Ambient Operating Temperature Range Input Frequency Output Load Capacitance Serial Data Transfer Rate ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 SYMBOL ) SYMBOL CONDITIONS/DESCRIPTION V 3.3V ± 3.3V ± 5% DD_I2C CLK ...

Page 10

... FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Table 9: DC Electrical Specifications Unless otherwise stated, all power supplies = 3.3V ± 5%, no load on any output, and ambient temperature range T characterization data and are not currently production tested to any specific limits ...

Page 11

... Clock High Time * t Clock Low Time * t Duty Cycle * Tristate Enable Delay * Tristate Disable Delay * ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 CONDITIONS/DESCRIPTION Measured on the rising edge at 1.5V; t skw C = 20pF L Measured on the rising edge at 1.5V; PLH(min 20pF L Measured on the rising edge at 1.5V; PLH(max) ...

Page 12

... FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Table 11: Serial Interface Timing Specifications Unless otherwise stated, all power supplies = 3.3V ± 5%, no load on any output, and ambient temperature range T characterization data and are not currently production tested to any specific limits ...

Page 13

... Figure 15: DC Measurement Points V = 2.4V OH 3.3 1. 0.4V OL 3.3 (device interface) Figure 16: Clock Skew Measurement Point 1.5V 3.3V t skw 3.3V 1.5V ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 High Drive Current (mA) Voltage (V) MIN. TYP. MAX. 0 -72 -116 -198 1 -72 -116 -198 1.4 -68 -110 -188 1.5 -67 -107 -184 1.65 -64 -103 -177 1 ...

Page 14

... FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs 6.0 Package Information Table 12: 48-pin SSOP (7.5mm/0.300") Package Dimensions DIMENSIONS INCHES MILLIMETERS MIN. MAX. MIN. MAX. A 0.095 ...

Page 15

... Table 15: 28-pin SOIC (7.5mm/0.300") Package Characteristics PARAMETER Thermal Impedance, Junction to Free-Air Lead Inductance, Self Lead Inductance, Mutual Lead Capacitance, Bulk Lead Capacitance, Mutual ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 28 AMERICAN MICROSYSTEMS, INC BASE PLANE SEATING PLANE SYMBOL CONDITIONS/DESCRIPTION Air flow = 0 m ...

Page 16

... FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Table 16: 28-pin SSOP (5.3mm/0.209") Package Dimensions DIMENSIONS INCHES MILLIMETERS MIN. MAX. MIN. MAX. A 0.068 0.078 1.73 2.00 A 0.002 ...

Page 17

... American Microsystems, Inc., 2300 Buckskin Rd., Pocatello, ID 83201, (208) 233-4690, FAX (208) 234-6796, WWW Address: http://www.amis.com E-mail: tgp@amis.com ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 OPERATING PACKAGE TYPE TEMPERATURE RANGE (Commercial (Commercial (Commercial (Commercial (Commercial) ...

Page 18

... FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs Low-Skew Clock Fanout Buffer ICs 8.0 Application Information 8.1 Reduction of EMI The primary concern when designing the board layout for this device is the reduction of electromagnetic interfer- ence (EMI) generated by the 18 copies of the 100MHz SDRAM clock ...

Page 19

... SCL lines depends on the supply voltage, the bus ca- ISO9001 ISO9001 ISO9001 ISO9001 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 FS6050/FS6051/FS6053/FS6054 pacitance, and the number of connected devices with their associated input currents. Control of the clock and data lines is done through open drain/collector current-sink outputs, and thus requires external pull-up resistors on both lines. A guideline ...

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