PI6C9911J 查看數據表（PDF） - Pericom Semiconductor

零件编号

产品描述 (功能)

比赛名单

PI6C9911J

5V High-Speed Programmable Skew Clock Buffers - SuperClock®

Pericom Semiconductor 

PI6C9911 & PI6C9911E

5V High Speed Programmable Skew

Clock Buffers - SuperClock®

111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222

Pin Definitions

Signal Name

REF

FB

FS

1F0, 1F1

2F0, 2F1

3F0, 3F1

4F0, 4F1

TEST

1Q0, 1Q1

2Q0, 2Q1

3Q0, 3Q1

4Q0, 4Q1

VCCN

VCCQ

GND

I/O

I

O

PWR

Description

Reference frequency input. This input supplies the frequency and timing reference which all

functional variation is measured.

PLL feedback input (typically connected to one of the eight outputs).

Three-level frequency range select. See Table 1.

Three-level function select inputs for output pair 1 (1Q0, 1Q1). See Table 2.

Three-level function select inputs for output pair 2 (2Q0, 2Q1). See Table 2.

Three-level function select inputs for output pair 3 (3Q0, 3Q1). See Table 2.

Three-level function select inputs for output pair 4 (4Q0, 4Q1). See Table 2.

Three-level select. See test mode section under the block diagram descriptions.

Output pair 1. See Table 2.

Output pair 2. See Table 2.

Output pair 3. See Table 2.

Output pair 4. See Table 2.

Power supply for output drivers.

Power supply for internal circuitry.

Ground

Block Diagram Description

Phase Frequency Detector and Filter

These two blocks accept input signals from the reference frequency

(REF) input and the feedback (FB) input and generate correction

information to control the frequency of the Voltage-Controlled

Oscillator (VCO). These blocks, along with the VCO, form a Phase-

Locked Loop (PLL) that tracks the incoming REF signal.

VCO and Time Unit Generator

The VCO accepts analog control inputs from the PLL filter block

and generates a frequency that is used by the time unit generator to

create discrete time units that are selected in the skew mix matrix.

The operational range of the VCO is determined by the FS control

pin. The time unit (tU) is determined by the operating frequency of

the device and the level of the FS pin as shown in Table 1.

Skew Select Matrix

The skew select matrix is comprised of four independent sections.

Each section has two low-skew, high-fanout drivers (xQ0, xQ1),

and two corresponding three-level function select (xF0, xF1)

inputs. Table 2 shows the nine possible output functions for each

section as determined by the function select inputs. All times are

measured with respect to the REF input assuming that the output

connected to the FB input has 0tU selected.

2

PS8451B 03/28/01

Share Link: