ICS83940DI_16 Datasheet, PDF (1/19 Pages) Integrated Device Technology – Low Skew, 1-to18 LVPECL-to-LVCMOS/LVTTL Fanout Buffer

Low Skew, 1-to18
LVPECL-to-LVCMOS/LVTTL Fanout Buffer
PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 (83940DKILF)
ICS83940DI
DATA SHEET
General Description
The ICS83940DI is a low skew, 1-to-18 LVPECL- to-LVCMOS/LVTTL
Fanout Buffer. The ICS83940DI has two selectable clock inputs. The
PCLK, nPCLK pair can accept LVPECL, CML, or SSTL input levels.
The LVCMOS_CLK can accept LVCMOS or LVTTL input levels. The
low impedance LVCMOS/LVTTL outputs are designed to drive 50
series or parallel terminated transmission lines.
The ICS83940DI is characterized at full 3.3V and 2.5V or mixed 3.3V
core, 2.5V output operating supply modes. Guaranteed output and
part-to-part skew characteristics make the ICS83940DI ideal for
those clock distribution applications demanding well defined
performance and repeatability.
Block Diagram
CLK_SEL ^Pulldown
PCLK ^Pulldown
nPCLK ^{Pullup/Pulldown}
0
LVCMOS_CLK ^Pulldown
1
18
Q0:Q17
Features
• Eighteen LVCMOS/LVTTL outputs
• Selectable LVCMOS_CLK or LVPECL clock inputs
• PCLK, nPCLK pair can accept the following differential input
levels: LVPECL, CML, SSTL
• LVCMOS_CLK supports the following input types: LVCMOS or
LVTTL
• Maximum output frequency: 250MHz
• Output skew: 150ps (maximum)
• Part-to-part skew: 750ps (maximum)
• Operating supply modes:
• Core/Output
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V
• -40°C to 85°C ambient operating temperature
• Lead-free (RoHS 6) packaging
• For functional replacement part for 83940DKILF use 87016i
Pin Assignments
32 31 30 29 28 27 26 25
GND 1
24 Q6
GND 2
23 Q7
LVCMOS_CLK 3
22 Q8
CLK_SEL 4
PCLK 5
ICS83940DI
21 VDD
20 Q9
nPCLK 6
19 Q10
VDD 7
18 Q11
VDDO 8
17 GND
9 10 11 12 13 14 15 16
GND
GND
LVCMOS_CLK
CLK_SEL
PCLK
nPCLK
VDD
VDDO
32 31 30 29 28 27 26 25
1
24 Q6
2
23 Q7
3
22 Q8
4 _ICS83940DI 21 VDD
5
20 Q9
6
19 Q10
7
18 Q11
8
17 GND
9 10 11 12 13 14 15 16
32 Lead VFQFN
5mm x 5mm x 0.925mm package body
K Package
Top View
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
ICS83940DYI REVISION C May 19, 2016
1
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