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MPC942CAC

P1-P3P4-P4
SEMICONDUCTOR TECHNICAL DATA
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by MPC942C/D
1
REV 0
Motorola, Inc. 2001
02/01
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 50Ω 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
With a low output impedance (≈12Ω), 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 12Ω 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.
LOW VOLTAGE
1:18 CLOCK
DISTRIBUTION CHIP
FA SUFFIX
32–LEAD TQFP PACKAGE
CASE 873A–02
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MPC942C
MOTOROLA TIMING SOLUTIONS
DL207 — Rev 0
2
Pinout: 32–Lead (Top View)
FUNCTION TABLE
OE Output
0
1
HIGH IMPEDANCE
OUTPUTS ENABLED
LOGIC DIAGRAM
GND
Q5
Q4
Q3
VCC
Q2
Q1
Q0
VCC
Q12
Q13
Q14
GND
Q15
Q16
Q17
Q6
Q7
Q8
VCC
Q9
Q10
Q11
GND
GND
GND
VCC
OE
NC
LVCMOS_CLK
NC
VCC
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
LVCMOS_CLK
Q0
Q1:Q16
Q17
OE
(Int. Pullup)
MPC942C Block Diagram
ABSOLUTE MAXIMUM RATING
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
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...
MPC942C
TIMING SOLUTIONS
DL207 — Rev 0
3 MOTOROLA
DC CHARACTERISTICS (T
A
= 0° to 70°C, 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 µA
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
AC CHARACTERISTICS (T
A
= 0° to 70°C, 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
DC CHARACTERISTICS (T
A
= 0° to 70°C, 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 µA
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
AC CHARACTERISTICS (T
A
= 0° to 70°C, 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
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.
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...
P1-P3P4-P4

MPC942CAC

Mfr. #:
Buy MPC942CAC
Manufacturer:
NXP / Freescale
Description:
Clock Drivers & Distribution 2.5 3.3V 250MHz Clock Generator
Lifecycle:
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