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MPC942CACR2

P1-P3P4-P6
DATASHEET
Low Voltage, 1:18 Clock Distribution Chip MPC942C
1©2016 Integrated Device Technology, Inc. Revision 3, October 4, 2016
OBSOLETE
The MPC942 is a 1:18 low voltage clock distribution chip with 2.5V or 3.3V LVCMOS
output capabilities. The device is offered in two versions; the MPC942C has an LVCMOS
input clock while the MPC942P has a LVPECL input clock. The 18 outputs are 2.5V or
3.3V LVCMOS compatible and feature the drive strength to drive 50 series or parallel
terminated transmission lines. With output-to-output skews of 200ps, the MPC942 is ideal
as a clock distribution chip for the most demanding of synchronous systems. The 2.5V
outputs also make the device ideal for supplying clocks for a high performance Pentium
II microprocessor based design.
• LVCMOS/LVTTL Clock Input
• 2.5V LVCMOS Outputs for Pentium II Microprocessor Support
• 150ps Maximum Targeted Output-to-Output Skew
• Maximum Output Frequency of 250MHz @ 3.3 V
CC
• 32-Lead TQFP Packaging
• Single 3.3V or 2.5V Supply
• For Functional replacement use 83940DYLF
With a low output impedance (12), in both the HIGH and LOW logic states, the output
buffers of the MPC942 are ideal for driving series terminated transmission lines. With an
output impedance of 12 the MPC942 can drive two series terminated transmission lines
from each output. This capability gives the MPC942 an effective fanout of 1:36. The
MPC942 provides enough copies of low skew clocks for most high performance synchronous systems.
The LVCMOS/LVTTL input of the MPC942C provides a more standard LVCMOS interface. The OE pins will place the outputs into a
high impedance state. The OE pin has an internal pullup resistor.
The MPC942 is a single supply device. The V
CC
power pins require either 2.5V or 3.3V. The 32-lead TQFP package was chosen to
optimize performance, board space and cost of the device. The 32-lead TQFP has a 7x7mm body size with a conservative 0.8mm pin
spacing.
Pentium II is a trademark of Intel Corporation.
MPC942C
LOW VOLTAGE
1:18 CLOCK
DISTRIBUTION CHIP
AC SUFFIX
32-LEAD TQFP PACKAGE
Pb-FREE PACKAGE
CASE 873A-03
OBSOLETE
MPC942C Datasheet
2©2016 Integrated Device Technology, Inc. Revision 3, October 4, 2016
OBSOLETE
.
FUNCTION TABLE
OE Output
0
1
HIGH IMPEDANCE
OUTPUTS ENABLED
Q0
Q1:Q16
Q17
OE
(Int. Pullup)
LVCMOS_CLK
LOGIC DIAGRAM
MPC942C Block Diagram
Pinout: 32-Lead (Top View)
GND
Q5
Q4
Q3
V
CC
Q2
Q1
Q0
V
CC
Q12
Q13
Q14
GND
Q15
Q16
Q17
Q6
Q7
Q8
V
CC
Q9
Q10
Q11
GND
GND
GND
V
CC
OE
NC
LVCMOS_CLK
NC
V
CC
25
26
27
28
29
30
31
32
15
14
13
12
11
10
9
12345678
24 23 22 21 20 19 18 17
16
MPC942C
Table 1. Absolute Maximum Ratings
Symbol Parameter Min Max Unit
V
CC
Supply Voltage –0.3 3.6 V
V
I
Input Voltage –0.3 V
CC
+ 0.3 V
I
IN
Input Current 20 mA
T
Stor
Storage Temperature Range –40 125 C
MPC942C Datasheet
3©2016 Integrated Device Technology, Inc. Revision 3, October 4, 2016
OBSOLETE
1. Tested using standard input levels, production tested @ 133 MHz.
2. Across temperature and voltage ranges, includes output skew.
3. For a specific temperature and voltage, includes output skew.
Table 2. DC Characteristics (T
A
= 0 to 70C, V
CCI
= 2.5V ±5%, V
CCO
= 2.5V ±5%)
Symbol Characteristic Min Typ Max Unit Condition
V
IH
Input HIGH Voltage 2.0 V
CCI
V
V
IL
Input LOW Voltage 0.8 V
V
OH
Output HIGH Voltage 2.0 V I
OH
= –16 mA
V
OL
Output LOW Voltage 0.5 V I
OL
= 16 mA
I
IN
Input Current 200 A
C
IN
Input Capacitance 4.0 pF
C
PD
Power Dissipation Capacitance 14 pF Per Output
Z
OUT
Output Impedance 12
I
CC
Maximum Quiescent Supply Current 0.5 mA
Table 3. AC Characteristics (T
A
= 0 to 70C, V
CCI
= 2.5V ±5%, V
CCO
= 2.5V ±5%)
Symbol Characteristic Min Typ Max Unit Condition
F
max
Maximum Frequency 200 MHz
t
PLH
Propagation Delay 1.5 2.8 ns
t
sk(o)
Output-to-Output Skew 200 ps
t
sk(pr)
Part-to-Part Skew 1.3 ns Notes 1, 2
t
sk(pr)
Part-to-Part Skew 600 ps Notes 1, 3
d
t
Duty Cycle 45 55 %
t
r
, t
f
Output Rise/Fall Time 0.2 1.0 ns
Table 4. DC Characteristics (T
A
= 0 to 70C, V
CCI
= 3.3V ±5%, V
CCO
= 3.3V ±5%)
Symbol Characteristic Min Typ Max Unit Condition
V
IH
Input HIGH Voltage 2.4 V
CCI
V
V
IL
Input LOW Voltage 0.8 V
V
OH
Output HIGH Voltage 2.4 V I
OH
= –20 mA
V
OL
Output LOW Voltage 0.5 V I
OL
= 20 mA
I
IN
Input Current 200 A
C
IN
Input Capacitance 4.0 pF
C
PD
Power Dissipation Capacitance 14 pF Per Output
Z
OUT
Output Impedance 12
I
CC
Maximum Quiescent Supply Current 0.5 mA
Table 5. AC Characteristics (T
A
= 0 to 70C, V
CCI
= 3.3V ±5%, V
CCO
= 3.3V ±5%)
Symbol Characteristic Min Typ Max Unit Condition
F
max
Maximum Frequency 250 MHz
t
PLH
Propagation Delay 1.3 2.3 ns Note 1
t
sk(o)
Output-to-Output Skew 200 ps
t
sk(pr)
Part-to-Part Skew 1.0 ns Notes 1, 2
t
sk(pr)
Part-to-Part Skew 500 ps Notes 1, 3
d
t
Duty Cycle 45 55 %
t
r
, t
f
Output Rise/Fall Time 0.2 1.0 ns
P1-P3P4-P6

MPC942CACR2

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Clock Drivers & Distribution FSL 1-27 LVCMOS Fanout Buffe
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