HD151BF854_06 RENESAS [Renesas Technology Corp], HD151BF854_06 Datasheet - Page 2

• Manufacturer Part Number: HD151BF854_06
• Description: 2.5 V PLL Clock Buffer for DDR Applicationjpeg
• Manufacturer: RENESAS [Renesas Technology Corp]

HD151BF854
Pin Arrangement
Pin Functions
AGND
AVDD
CLKIN
FBIN
FBOUT
GND
VDD
Y
Y
NC
Rev.5.00 Apr 07, 2006 page 2 of 7
Pin name
11
10
8
20
19
6, 15, 28
3, 12, 23
2, 4, 13,
17, 24, 26
1, 5, 14,
16, 25, 27
7, 9, 18, 21,
22
No.
Ground
Power
Input
Input
Output
Ground
Power
Output
Output
NC
CLKIN
AGND
AVDD
Type
GND
VDD
VDD
NC
NC
Y0
Y0
Y1
Y1
Y2
Y2
11
12
13
14
10
1
4
2
3
5
8
6
7
9
Analog ground. AGND provides the ground reference for the analog circuitry.
Analog power supply. AVDD provides the power reference for the analog
circuitry. In addition, AVDD can be used to bypass the PLL for test purposes.
When AVDD is strapped to ground, PLL is bypassed and CLK is buffered
directly to the device outputs.
Clock input. CLKIN provides the clock signal to be distributed by the
HD151BF854 clock buffer. CLK is used to provide the reference signal to the
integrated PLL that generates the clock output signals. CLK must have a
fixed frequency and fixed phase for the PLL to obtain phase lock. Once the
circuit is powered up and a valid CLK signal is applied, a stabilization time is
required for the PLL to phase lock the feedback signal to its reference signal.
Feedback input. FBIN provides the feedback signal to the internal PLL. FBIN
must be hard-wired to FBOUT to complete the PLL. The integrated PLL
synchronizes CLKIN and FBIN so that there is nominally zero phase error
between CLKIN and FBIN.
Feedback output. FBOUT is dedicated for external feedback. It switches at
the same frequency as CLK. When externally wired to FBIN, FBOUT
completes the feedback loop of the PLL.
Ground
Power supply
Clock outputs. (+Clock) These outputs provide low-skew copies of CLK.
Bar clock outputs. (–Clock) These outputs provide low-skew copies of CLK.
Don’t connect any VDD or GND.
(Top view)
Description
28
27
26
25
24
23
22
21
20
19
18
17
16
15
GND
Y5
Y5
Y4
VDD
NC
NC
FBIN
FBOUT
Y3
Y3
Y4
NC
GND