ICS8344 View Datasheet(PDF) - Integrated Device Technology
Part Name
Description
MFG CO.
'ICS8344' PDF : 18 Pages View PDF
ICS8344
LOW SKEW, 1-TO-24
DIFFERENTIAL-TO-LVCMOS FANOUT BUFFER
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1, 2, 5, 6
7, 8, 11, 12
Q16, Q17, Q18, Q19
Q20, Q21, Q22, Q23
Output
Q15 thru Q23 outputs. 7Ω typical output impedance.
3, 9, 28,
34, 39, 45
4, 10, 14,18,
27, 33, 40, 46
13
15, 19
16
VDDO
GND
CLK_SEL
VDD
nCLK1
Power
Output supply pins. Connect 3.3V or 2.5V.
Power
Input
Power
Input
Power supply ground. Connect to ground.
Pulldown
Clock select input. When HIGH, selects CLK1, nCLK1 inputs.
When LOW, selects CLK0, nCLK0 inputs.
Positive supply pins. Connect 3.3V or 2.5V.
Pullup Inverting input of secondary differential clock input pair.
17
CLK1
Input Pulldown Non-inverting input of secondary differential clock input pair.
20
nCLK0
Input Pullup Inverting input of primary differential clock input pair.
21
CLK0
Input Pulldown Non-inverting input of primary differential clock input pair.
22
OE3
Input
Pullup
Output enable. Controls enabling and disabling of outputs
Q16 thru Q23.
23
OE2
Input
Pullup
Output enable. Controls enabling and disabling of outputs
Q8 thru Q15.
24
OE1
Input
Pullup
Output enable. Controls enabling and disabling of outputs
Q0 thru Q7.
25, 26, 29, 30
31, 32, 35, 36
Q0, Q1, Q2, Q3
Q4, Q5, Q6, Q7
Output
Q0 thru Q7 outputs. 7Ω typical output impedance.
37, 38, 41, 42
43, 44, 47, 48
Q8, Q9, Q10, Q11
Q12, Q13, Q14, Q15
Output
Q8 thru Q15 outputs. 7Ω typical output impedance.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol Parameter
CIN
Input Capacitance
CPD
Power Dissipation Capacitance
(per output)
RPULLUP
RPULLDOWN
R
OUT
Input Pullup Resistor
Input Pulldown Resistor
Output Impedance
Test Conditions
VDD, VDDO = 3.465V
VDD = 3.465V, VDDO = 2.625V
VDD, VDDO = 2.625V
Minimum
Typical
51
51
7
Maximum
4
Units
pF
pF
pF
pF
kΩ
kΩ
Ω
8344BY
2
REV. A JANUARY 5, 2011
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