CY7B9911V-7JC Cypress Semiconductor Corporation., CY7B9911V-7JC Datasheet

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CY7B9911V-7JC

Manufacturer Part Number
CY7B9911V-7JC
Description
LOW VOLTAGE PROGRAMMABLE SKEW CLOCK
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

Specifications of CY7B9911V-7JC

Case
PLCC-32L
Cypress Semiconductor Corporation
Document Number: 38-07408 Rev. *D
Features
Logic Block Diagram
All output pair skew <100 ps typical (250 max)
3.75 to 110 MHz output operation
User selectable output functions
Zero input-to-output delay
50% duty cycle outputs
LVTTL outputs drive 50Ω terminated lines
Operates from a single 3.3V supply
Low operating current
32-pin PLCC package
Jitter 100 ps (typical)
Selectable skew to 18 ns
Inverted and non-inverted
Operation at
Operation at 2x and 4x input frequency (input as low as
3.75 MHz)
1
2
and
1
4
input frequency
REF
FB
TEST
4F0
4F1
3F0
3F1
2F0
2F1
1F0
1F1
FS
PHASE
FREQ
DET
SELECT
(THREE
INPUTS
LEVEL)
198 Champion Court
High Speed Low Voltage Programmable Skew
FILTER
GENERATOR
TIME UNIT
VCO AND
SELECT
MATRIX
SKEW
Functional Description
The CY7B9911V 3.3V RoboClock+™ High Speed Low
Voltage Programmable Skew Clock Buffer (LVPSCB) offers
user selectable control over system clock functions. These
multiple output clock drivers provide the system integrator with
functions necessary to optimize the timing of high perfor-
mance computer systems. Each of the eight individual drivers,
arranged in four pairs of user controllable outputs, can drive
terminated transmission lines with impedances as low as 50Ω.
They deliver minimal and specified output skews and full swing logic
levels (LVTTL).
Each output is hardwired to one of nine delay or function
configurations. Delay increments of 0.7 to 1.5 ns are deter-
mined by the operating frequency with outputs that can skew
up to ±6 time units from their nominal “zero” skew position. The
completely integrated PLL allows external load and cancels
the transmission line delay effects. When this “zero delay”
capability of the LVPSCB is combined with the selectable
output skew functions, you can create output-to-output delays
of up to ±12 time units.
Divide-by-two and divide-by-four output functions are provided
for additional flexibility in designing complex clock systems.
When combined with the internal PLL, these divide functions
allow distribution of a low frequency clock that are multiplied
by two or four at the clock destination. This facility minimizes
clock distribution difficulty enabling maximum system clock
speed and flexibility.
San Jose
,
CA 95134-1709
4Q0
4Q1
3Q0
3Q1
2Q0
2Q1
1Q0
1Q1
3.3V RoboClock+™
Clock Buffer
Revised June 20, 2007
CY7B9911V
408-943-2600
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Related parts for CY7B9911V-7JC

CY7B9911V-7JC Summary of contents

Page 1

... Document Number: 38-07408 Rev. *D High Speed Low Voltage Programmable Skew Functional Description The CY7B9911V 3.3V RoboClock+™ High Speed Low Voltage Programmable Skew Clock Buffer (LVPSCB) offers user selectable control over system clock functions. These multiple output clock drivers provide the system integrator with functions necessary to optimize the timing of high perfor- mance computer systems ...

Page 2

... GND 12 22 GND Description Table 1. “Test Mode” on page 4 under the Table 2. Table 2. Table 2. Table 2. CY7B9911V 3.3V RoboClock+™ 2F0 GND 1F1 1F0 V CCN 1Q0 1Q1 GND GND Table 2. Table 2. Table 2. Table 2. “Block Diagram Description” on page 3. Page [+] Feedback ...

Page 3

... LOW indicates a connection to GND, and MID indicates an open connection. Internal termination the V and Time Unit Generator (see). Nominal frequency (f NOM CO Table / NOM has reached 2.8V. CC CY7B9911V 3.3V RoboClock+™ Table 2 shows the nine possible output [1] Output Functions 1Q0, 1Q1, 3Q0, 3Q1 4Q0, 4Q1 3F0, 4F0 2Q0, 2Q1 – ...

Page 4

... INVERT Test Mode The TEST input is a three level input. In normal system operation, this pin is connected to ground, allowing the CY7B9911V to operate as described in Description” on page 3. For testing purposes, any of the three level inputs can have a removable jumper to ground or be tied LOW through a 100W resistor. This enables an external tester to change the state of these pins ...

Page 5

... Figure 2 shows the LVPSCB configured as a zero skew clock buffer. In this mode the CY7B9911V is used as the basis for a low skew clock distribution tree. When all the function select inputs (xF0, xF1) are left open, each of the outputs are aligned and drive a terminated transmission line to an independent load ...

Page 6

... LVPSCB to multiply the clock rate at the REF input by either two or four. This mode enables the designer to distribute a low frequency clock between various portions of the system, and then locally multiply the clock rate to a more suitable CY7B9911V 3.3V RoboClock+™ ⁄ ⁄ ...

Page 7

... TEST Figure 8 shows the CY7B9911V connected in series to construct a zero skew clock distribution tree between boards. Delays of the downstream clock buffers are programmed to compensate for the wire length (that is, select negative skew equal to the wire delay) necessary to connect them to the master clock source, approximating a zero delay clock tree. Cascaded clock buffers accumulates low frequency jitter because of the non-ideal filtering characteristics of the PLL filter ...

Page 8

... CY7B9911V must be tested one output at a time, output shorted for less than one second, less than 10% duty cycle. Room temperature only. 8. Total output current per output pair is approximated by the following expression that includes device current plus load current: CY7B9911V: ICCN = [(4 + 0.11F) + [[((835 – ...

Page 9

... RMS [12] Peak-to-Peak CY7B9911V 3.3V RoboClock+™ [10] Max Unit 10 pF 3.0V 2.0V V =1.5V th 0.8V ≤1ns CY7B9911V-5 Unit Min Typ Max 15 30 MHz 110 5.0 ns 5.0 ns See Table 1 0.1 0.25 ns 0.25 0.5 ns 0.6 0.7 ns 0.5 1 ...

Page 10

... JR Jitter Notes 11. Test measurement levels for the CY7B9911V are TTL levels (1.5V to 1.5V). Test conditions assume signal transition times less and output loading as shown in the AC Test Loads and Waveforms 12. Guaranteed by statistical correlation. Tested initially and after any design or process changes that may affect these parameters. ...

Page 11

... AC Timing Diagrams REF OTHER Q INVERTED Q REF DIVIDED BY 2 REF DIVIDED BY 4 Document Number: 38-07408 Rev REF RPWL t RPWH t ODCV t ODCV t t SKEWPR, SKEWPR SKEW0,1 SKEW0,1 t SKEW2 t SKEW3,4 t SKEW3,4 t SKEW1,3, 4 CY7B9911V 3.3V RoboClock+™ SKEW2 t SKEW3,4 t SKEW2,4 Page [+] Feedback ...

Page 12

... Ordering Information Accuracy (ps) Ordering Code 500 CY7B9911V-5JC 500 CY7B9911V-5JCT [23] 700 CY7B9911V-7JC [23] 700 CY7B9911V-7JCT Pb-Free 500 CY7B9911V-5JXC 500 CY7B9911V-5JXCT [23] 700 CY7B9911V-7JXC [23] 700 CY7B9911V-7JXCT Note 23. Parts not recommended for the new design. Document Number: 38-07408 Rev. *D Package Type 32-Pb Plastic Leaded Chip Carrier 32-Pb Plastic Leaded Chip Carrier – ...

Page 13

... Package Diagram Figure 10. 32-Pin Plastic Leaded Chip Carrier J65 Document Number: 38-07408 Rev. *D CY7B9911V 3.3V RoboClock+™ 51-85002-*B Page [+] Feedback ...

Page 14

... Document History Page Document Title: CY7B9911V 3.3V RoboClock+™ High Speed Low Voltage Programmable Skew Clock Buffer Document Number: 38-07408 Orig. of REV. ECN NO. Issue Date Change ** 114350 3/20/02 *A 299713 See ECN *B 404630 See ECN *C 1199925 See ECN KVM/AESA Added Note 23: Parts not recommended for the new design in Ordering ...

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