PI6C487016 Datasheet, PDF (1/8 Pages) Pericom Semiconductor Corporation – Low Skew, 1-to-16 LVCMOS / LVTTL Clock Driver

PI6C487016
Low Skew, 1-to-16
LVCMOS / LVTTL Clock Driver
Product Features
• 16 LVCMOS/LVTTL outputs (4 banks of 4 outputs)
• Selectable differential or single-ended clock inputs
• CLK1, nCLK1 pair can accept the following differential input
levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL
• CLK0 supports the following input types: LVCMOS, LVTTL
• Maximum output frequency: 250MHz
• Independent bank control for ÷1 or ÷2 operation
• Independent output bank voltage settings for 3.3V, 2.5V, or
1.8V operations
• Output skew: 170ps (max)
• Bank skew: 50ps (max)
• Part-to-part skew: 800ps (max)
• 3.3V core, 3.3V, 2.5V, or 1.8V output operating supply
• -40° to +85°C ambient operating temperature
• Available packages:
-Pb-free & green 48-pin LQFP(FB)
Product Description
The PI6C487016 is a low skew. 1:16 LVCMOS/LVTTL Clock
Driver. The device has 4 banks of 4 outputs and each bank can
be independently selected for ÷1 or ÷2 frequency operation.
Each bank also has its own power supply pins so that the banks
can operate at the following different voltage levels: 3.3V, 2.5V,
and 1.8V. The low impedance LVCMOS/LVTTL outputs are
designed to drive 50Ω series or parallel terminated transmission
lines.
The divide select inputs, SELA:SELD, control the output fre-
quency of each bank with either ÷1 or ÷2 frequency operation.
The bank enable inputs, ENA:END, support enabling and dis-
abling each bank of outputs individually. The outputs synchro-
nized when enabling or disabling the clock outputs. The master
reset input nMR/OE, resets the ÷1/÷2 flip flops and also controls
the active and high impedance states of all outputs.
The PI6C487016 is characterized to operate with the core at
3.3V and the output banks at 3.3V, 2.5V or 1.8V.
Block Diagram
nMR/OE
CLK0
CLK1
nCLK1
CLK_SEL
SELA
SELB
SELC
SELD
ENA
ENB
ENC
END
0
÷1
1
1
÷2
0
1
0
1
0
1
0
Pin Description
D
4
QA0:QA3
LE
D
LE
4
QB0:QB3
D
LE
4
QC0:QC3
D
LE
4
QD0:QD3
VDD
CLK0
SELA
SELB
SELC
SELD
ENA
ENB
ENC
END
nMR/OE
GND
48 47 46 45 44 43 42 41 40 39 38 37
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
13 14 15 16 17 18 19 20 21 22 23 24
GND
QB0
VDDOB
QB1
GND
QB2
VDDOB
QB3
GND
QC0
VDDOC
QC1
1
PS8741D
07/29/05