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CY28408 Datasheet(PDF) 18 Page - Cypress Semiconductor

Part No. CY28408
Description  Clock Synthesizer with Differential CPU Outputs
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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CY28408 Datasheet(HTML) 18 Page - Cypress Semiconductor

 
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CY28408
Document #: 38-07617 Rev. **
Page 18 of 19
© Cypress Semiconductor Corporation, 2003. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize
its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
Iout is selectable depending on implementation. The param-
eters above apply to all configurations. Vout is the voltage at
the pin of the device.
The various output current configurations are shown in the
host swing select functions table. For all configurations, the
deviation from the expected output current is ±7% as shown in
the current accuracy table.
Package Drawings and Dimensions
Intel is a registered trademark of Intel Corporation. Dial-A-Frequency is a registered trademark, and Dial-a-dB is a trademark, of
Cypress Semiconductor. All product and company names mentioned in this document are the trademarks of their respective
holders.
Table 12.Host Clock (HCSL) Buffer Characteristics
Characteristic
Minimum
Maximum
Ro
3000 Ohms (recommended)
N/A
Ros
Vout
N/A
1.2V
Table 13.CPU Clock Current Select Function
Mult0
Board Target Trace/Term Z
Reference R, Iref – Vdd (3*Rr)
Output Current
Voh @ Z
0
50 Ohms
Rr = 221 1%, Iref = 5.00mA
Ioh = 4*Iref
1.0V @ 50
1
50 Ohms
Rr = 475 1%, Iref = 2.32mA
Ioh = 6*Iref
0.7V @ 50
Ordering Information
Part Number
Package Type
Product Flow
CY28408ZC
56-Pin TSSOP
Commercial, 0
° to 70°C
CY28408ZCT
56-Pin TSSOP - Tape and Reel
Commercial, 0
° to 70°C
SEATING
PLANE
1
BSC
0°-8°
MAX.
GAUGE PLANE
28
29
56
1.100[0.043]
0.051[0.002]
0.851[0.033]
0.508[0.020]
0.249[0.009]
7.950[0.313]
0.25[0.010]
6.198[0.244]
13.894[0.547]
8.255[0.325]
5.994[0.236]
0.950[0.037]
0.500[0.020]
14.097[0.555]
0.152[0.006]
0.762[0.030]
DIMENSIONS IN MM[INCHES] MIN.
MAX.
0.170[0.006]
0.279[0.011]
0.20[0.008]
0.100[0.003]
0.200[0.008]
REFERENCE JEDEC MO-153
PACKAGE WEIGHT 0.42gms
PART #
Z5624 STANDARD PKG.
ZZ5624 LEAD FREE PKG.
56-Lead Thin Shrunk Small Outline Package, Type II (6 mm x 12 mm) Z56
51-85060-*C


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