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Número de pieza | 83948I | |
Descripción | 1-to-12 Differential-toLVCMOS/LVTTL Fanout Buffer | |
Fabricantes | IDT | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de 83948I (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
No Preview Available ! Low Skew, 1-to-12 Differential-to-
LVCMOS/LVTTL Fanout Buffer
83948I
Datasheet
PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017
General Description
Features
The 83948I is a low skew, 1-to-12 Differential-to-LVCMOS/LVTTL
Fanout Buffer and a member of the family of High Performance
Clock Solutions from IDT. The 83948I has two selectable clock
inputs. The CLK, nCLK pair can accept most standard differential
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 effective fanout can be increased from 12 to 24 by
utilizing the ability of the outputs to drive two series terminated
lines.
The 83948I is characterized at full 3.3V core/3.3V output.
Guaranteed output and part-to-part skew characteristics make the
83948I ideal for those clock distribution applications demanding
well defined performance and repeatability.
• Twelve LVCMOS/LVTTL outputs
• Selectable differential CLK/nCLK or LVCMOS/LVTTL clock
input
• CLK/nCLK pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL
• LVCMOS_CLK supports the following input types: LVCMOS,
LVTTL
• Maximum output frequency: 250MHz
• Output skew: 350ps (maximum)
• Part-to-part skew: 1.5ns (maximum)
• 3.3V core, 3.3V output
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package
• For drop in replacement part use 83948i-147
CLK_EN Pullup
LVCMOS_CLK Pullup
CLK Pullup
nCLK Pulldown
1
0
CLK_SEL Pullup
Block Diagram
D
Q
OE Pullup
©2016 Integrated Device Technology, Inc
Pin Assignment
32 31 30 29 28 27 26 25
Q0 CLK_SEL 1
LVCMOS_CLK 2
24 GND
23 Q4
Q1 CLK 3
22 VDDO
Q2 nCLK 4
CLK_EN 5
Q3
OE 6
Q4 VDD 7
21 Q5
20 GND
19 Q6
18 VDDO
Q5 GND 8
17 Q7
9 10 11 12 13 14 15 16
Q6
Q7
83948I
Q8
32-Lead LQFP
Q9 7mm x 7mm x 1.4mm package body
Q10 Y Package
Top View
Q11
1 May 19, 2016
1 page Parameter Measurement Information
1.65V±0.15V
VDD,
VDDO
SCOPE
Qx
GND
-1.65V±0.15V
3.3V Core/3.3V LVCMOS Output Load AC Test Circuit
VDD
nCLK
CLK
V
PP
GND
Cross Points
Differential Input Level
83948I Datasheet
V
CMR
Part 1
Qx
V
DDO
2
Part 2
Qy
V
DDO
2
t sk(pp)
Part-to-Part Skew
V
DDO
Qx 2
V
DDO
Qy 2
t sk(o)
Output Skew
0.8V
Q0:Q11
2V
tR
Output Rise/Fall Time
2V
0.8V
tF
Q0:Q11
VDDO
2
t PW
odc = t PW
t PERIOD
VDDO
2
t PERIOD
Output Pulse Width
VDDO
2
©2016 Integrated Device Technology, Inc
5
May 19, 2016
5 Page 83948I Datasheet
Ordering Information
Table 8. Ordering Information
Part/Order Number
83948AYILF
83948AYILFT
Marking
ICS83948AYIL
ICS83948AYI
Package
“Lead-Free” 32 Lead LQFP
“Lead-Free” 32 Lead LQFP
Shipping Packaging
Tray
Tape & Reel
Temperature
-40C to 85C
-40C to 85C
©2016 Integrated Device Technology, Inc
11
May 19, 2016
11 Page |
Páginas | Total 13 Páginas | |
PDF Descargar | [ Datasheet 83948I.PDF ] |
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