QUALITY SEMICONDUCTOR, INC. Skew Clock Driver/ Buffer Mobile with

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QS5814 ADVANCE INFORMATION
QUALITY SEMICONDUCTOR, INC.
Skew Clock Driver/ Buffer Mobile with SO-DIMMS
QS5814 ADVANCE INFORMATION
DESCRIPTION
QS5814 high speed, noise non-inverting buffer designed SDRAM clock buffer applications. outputs them could used drive four SDRAM SO-DIMMs, remaining used external feedback stage synchronization master clock. QS5814 also includes interface, which enable disable each output clock when lines used. turning outputs will reducing EMI.
output buffer/driver Tri-state testing programming capability Power Supply Voltage 3.3V Skew outputs (<250ps) Multiple noise reduction SSOP package
Figure Functional Block Diagram
DECODING PORT
SDRAM SDRAM SDRAM SDRAM SDRAM SDRAM SDRAM
SDATA
SCLK
BUF_IN SDRAM SDRAM SDRAM SDRAM SDRAM SDRAM SDRAM
MDSC-00044-00 SEPTEMBER 1998
QUALITY SEMICONDUCTOR, INC.
QS5814 ADVANCE INFORMATION Figure Configuration (All Pins View)
SSOP
SDRAM SDRAM SDRAM SDRAM BUF_IN SDRAM SDRAM SDRAM VDDI2C SDATA
SDRAM SDRAM SDRAM SDRAM SDRAM SDRAM SDRAM GNDI2C SCLK
Table Description
Name SDRAM (0:5) SDRAM (6:11) SDRAM (12:13) BUF_IN Number 2,3,6,7,10,11 18,19,22,23, 26,27 12,17 Type
Functional Description SDRAM Byte Clock outputs. SDRAM Byte Clock outputs.
1,5,24,28 4,8,21,25
SDATA SCLK GNDI2C VDDI2C
SDRAM Byte Clock outputs. Input buffers. Tri-state output enable. When asserted HIGH, clock outputs high impedance. 100k internal pull VDD. Data input. 100k internal pull VDD. Clock input. 100k internal pull VDD. 3.3V power supply output buffers. Ground output buffers Ground circuitry. 3.3V power supply circuitry.
Table Absolute Maximum Ratings
Supply Voltage Ground -0.5V 4.6V Output Voltage VOUT -0.5V 4.6V Input Voltage -0.5V 4.6V Input Diode Current with -20mA Maximum Power Dissipation 85°C, 600mW TSTG Storage Temperature -65° 150°C
Note: Stresses greater than those listed under absolute MAXIMUM RATINGS cause permanent damage devices that result functional reliability type failures.
QUALITY SEMICONDUCTOR, INC.
MDSC-00044-00 SEPTEMBER 1998
QS5814 ADVANCE INFORMATION Table Recommended Operating Conditions
Symbol Description Power Supply Voltage Operating Temperature Load Capacitance Input Capacitance(1) 3.135 3.465 Unit
Table Electrical Characteristics Over Operating Range
Symbol Parameter Input High Voltage Input Voltage Input High Current Input Current Supply Current Test Condition inputs inputs except inputs Inputs with 100k pull 0pF; 66.66MHz(1) 30pF; 66.66MHz(1) 0pF; 100MHz(1) 30pF; 100MHz(1) BUF_IN -36mA 25mA SDATA IOLI2C -100 Unit
VOLI2C
Table Electrical Characteristics Over Operating Range
Symbol Parameter Rise Time Fall Time(1) Duty Cycle(1) Skew (output output)(1)
ompa
Output High Voltage Output Voltage Output Voltage
TPHL Propagation Delay TPLH TPROP Propagation Delay TPROP Propagation Delay
1.5V; Figure 1.5V; Figure
Test Condition
0.4V 2.4V; 30pF 2.4V 0.4V; 30pF 1.5V; 30pF 1.5V; 30pF outputs; Figure 1.5V
Unit
Note: Guaranteed design, subject 100% production testing.
MDSC-00044-00 SEPTEMBER 1998
QUALITY SEMICONDUCTOR, INC.
QS5814 ADVANCE INFORMATION Serial Interface Control
interface permits individual enable/disable each clock output: unused outputs disabled reduce EMI. QS5814 slave receiver device. read back data stored latches verification. data transfer rate supported interface 100k bits/sec. Data transferred bytes (with addition start, stop, acknowledge bits) sequential order from lowest highest byte with ability stop after complete byte been transferred. first bytes transferred must Command Code followed Byte Count. Both these bytes ignored device. address QS5814
Address read/write writes reads. During read back, first byte read Byte Count representing number bytes following (fixed
Table Serial Configuration Command Bitmaps
Byte SDRAM Active/Inactive Register Enable, Disable), Default Enable
Description SDRAM (Active/Inactive) SDRAM (Active/Inactive) Initialize Initialize SDRAM (Active/Inactive) SDRAM (Active/Inactive) SDRAM (Active/Inactive) SDRAM (Active/Inactive)
Byte SDRAM Active/Inactive Register Enable, Disable), Default Enable
Byte SDRAM Active/Inactive Register Enable, Disable), Default Enable
Description SDRAM (Active/Inactive) SDRAM (Active/Inactive) Reserved, power Reserved, power Reserved, power Reserved, power Reserved, power Reserved, power
Description SDRAM (Active/Inactive) SDRAM (Active/Inactive) SDRAM (Active/Inactive) SDRAM (Active/Inactive) Initialize Initialize SDRAM (Active/Inactive) SDRAM (Active/Inactive)
QUALITY SEMICONDUCTOR, INC.
MDSC-00044-00 SEPTEMBER 1998
QS5814 ADVANCE INFORMATION Figure Test Circuit
Pulse Generator VOUT 7.0V Parameter Switch Tested Position Closed tPLZ, tPZL Others Coax Oscilloscope Open
30pF
Figure Timing Diagram
ENABLE
DISABLE
CONTROL INPUT OUTPUT NORMALLY tPZL SWITCH CLOSED tPZH SWITCH OPEN 0.5VCC 0.5VCC
tPLZ 0.3V tPHZ 0.3V
1.5V 3.5V
INPUT
OUTPUT NORMALLY HIGH
Enable Disable Times
1.5V tPLH OUTPUT tPHL 2.0V 0.5VCC 0.8V
OUTPUT tPLH tPHL INPUT
1.5V 0.5VCC
Propagation Delay
Pulse Skew tSK(p)
MDSC-00044-00 SEPTEMBER 1998
QUALITY SEMICONDUCTOR, INC.
QS5814 ADVANCE INFORMATION Figure Ordering Information
Clock Management Product Prefix (QS5) Part Number Package (200-mil SSOP)
Figure Packaging Information 200-mil SSOP Package Code
Shrink Small Outline Package
Notes: Refer applicable symbol list. dimensions inches. number lead positions. reference datums molded body include mold flash protrusions. Mold flash protrusions shall exceed .006 side. Inter-lead flash protrusions shall exceed .008 side.
BASE PLANE
SEATING PLANE
GAGE PLANE
MO-150-AH 0.008 0.015 0.008 0.409 0.212 0.0256 0.295 0.025 .071 .010 .035
JEDEC# DWG# Symbol .065 0.319 0.040 0.079 0.002 0.010 0.004 0.394 0.205
QUALITY SEMICONDUCTOR, INC.
MDSC-00044-00 SEPTEMBER 1998

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