ICS8308I Datasheet, PDF (12/16 Pages) Integrated Circuit Systems – Low Skew, 1-To-8 Differential/LVCOMS-TO-LVCMOS Fanout Buffer

ICS8308I
LOW SKEW, 1-TO-8 DIFFERENTIAL/LVCMOS-TO-LVCMOS FANOUT BUFFER
SCHEMATIC EXAMPLE
Figure 3 shows a schematic example of the ICS8308I. In this
example, the LVCMOS_CLK input is selected. The decoupling
capacitors should be physically located near the power pin.
VDD
VDD
R9 R10 R12
1K 1K 1K
VDD
Ro ~ 7 Ohm Zo = 50 Ohm
R11 43
3.3V_LVCMOS
(U1,9) VDD (U1,12)
VDD=3.3V
(U1,16) (U1,20)
(U1,24)
C1
0.1u
C2
0.1u
C3
0. 1u
C4
0. 1u
C5
0.1u
U1
1
2
Q0
3
4
5
6
7
GND
CLK_SEL
LVCMOS_CLK
CLK
nCLK
8
9
10
11
CLK_EN
OE
VDD
GND
12
Q1
VDDO
VDDO
24
23
Q2
GND
Q3
VDDO
Q4
22
21
20
19
18
GND
Q5
VDDO
Q6
17
16
15
14
GND
Q7
13
ICS8308I
R1
VDD
Zo = 50 Ohm
43
3.3V LVCMOS/LVTTL
Zo = 50 Ohm
R8 43
3.3V LVCMOS/LVTTL
FIGURE 3. ICS8308I LVPECL BUFFER SCHEMATIC EXAMPLE
RELIABILITY INFORMATION
TABLE 6. θ VS. AIR FLOW TABLE FOR 24 LEAD TSSOP
JA
θ by Velocity (Linear Feet per Minute)
JA
Multi-Layer PCB, JEDEC Standard Test Boards
0
70°C/W
200
63°C/W
TRANSISTOR COUNT
The transistor count for ICS8308I is: 1040
500
60°C/W
IDT^™ / ICS^™ LVCMOS FANOUT BUFFER
12
ICS8308AGI REV. B OCTOBER 16, 2007