CY7C68000A-56LTXCT Cypress Semiconductor Corp, CY7C68000A-56LTXCT Datasheet - Page 13

• Manufacturer Part Number: CY7C68000A-56LTXCT
• Description: IC TXRX USB 2.0 TX2 56VQFN
• Manufacturer: Cypress Semiconductor Corp
• Series: CY7Cr
• Type: Transceiverr

Specifications of CY7C68000A-56LTXCT

• Protocol: USB 2.0
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 56-VQFN Exposed Pad, 56-HVQFN, 56-SQFN, 56-DHVQFN
• For Use With: CY3685 - KIT DEV EZ-USB NX2LPCY3683 - KIT EZ-USB TX2 DEVELOPMENT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Drivers/receivers: -

PCB Layout Recommendations
Follow these recommendations to ensure reliable, high perfor-
mance operation
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■
■
■
Document #: 38-08052 Rev. *H
Note
A four-layer impedance controlled board is required to maintain
signal quality
Specify impedance targets (ask your board vendor what they
can achieve)
To control impedance, maintain trace widths and trace spacing
to within written specifications
Minimize stubs to minimize reflected signals
Package Diagrams
3. Source for recommendations: EZ-USB FX2™ PCB Design Recommendations, http:///www.cypress.com/cfuploads/support/app_notes/FX2_PCB.pdf
High-Speed USB Platform Design Guidelines, http://www.usb.org/developers/docs/hs_usb_pdg_r1_0.pdf.
[3]
PIN A1 CORNER
.
A
B
C
D
E
F
G
H
-C-
1
SEATING PLANE
2
SIDE VIEW
3
5.00±0.10
TOP VIEW
(continued)
4
5
Figure 7. 56 VFBGA (5 x 5 x 1.0 mm) 0.50 Pitch, 0.30 Ball BZ56
6
6
8
■
■
■
■
■
■
Connections between the USB connector shell and signal
ground must be done near the USB connector
Bypass and flyback capacitors on VBus, near the connector,
are recommended
Keep DPLUS and DMINUS trace lengths within 2 mm of each
other in length, with preferred length of 20 to 30 mm
Maintain a solid ground plane under the DPLUS and DMINUS
traces. Do not split the plane under these traces
Do not place vias on the DPLUS or DMINUS trace routing
Isolate the DPLUS and DMINUS traces from all other signal
traces by no less than 10 mm
PACKAGE WEIGHT: 0.02 grams
REFERENCE JEDEC: MO-195C
-B-
0.10(4X)
-A-
BOTTOM VIEW
8
7
Ø0.05 M C
Ø0.15 M C A B
Ø0.30±0.05(56X)
6
5.00±0.10
5
0.50
3.50
4
001-03901-*B
3
2
1
CY7C68000A
A1 CORNER
A
C
G
B
D
E
F
H
Page 13 of 15
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