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Freescale Semiconductor Technical Data
MPC94551 Rev 3, 2/2005
Low Voltage 1:4 CMOS Clock Buffer
The MPC94551 is a CMOS 1:4 fanout buffer. The MPC94551 is ideal for applications requiring lower voltage. Features * * * * * * * * 1:4 CMOS fanout buffer 300 ps output to output skew I/O frequency up to 160 MHz operation Non-inverting output clock 3.3 V supply voltage Output Enable mode tri-states outputs -40C to 85C industrial temperature range Standard 8-lead SOIC package 1:4 LVCMOS CLOCK BUFFER
MPC94551
D SUFFIX 8-LEAD SOIC PACKAGE CASE 751-06
EF SUFFIX 8-LEAD SOIC PACKAGE Pb-FREE PACKAGE CASE 751-06
ORDERING INFORMATION
Device MPC94551D MPC94551DR2 MPC94551EF MPC94551EFR2 Package SO-8 SO-8 SO-8 (Pb-FREE) SO-8 (Pb-FREE)
Q1 ICLK 1 2 3 4 8 7 6 5 OE VDD GND Q4
Q2 ICLK Q3
Q1 Q2 Q4 Q3
OE
Figure 1. Logic Diagram
Figure 2. Pin Assignment
(c) Freescale Semiconductor, Inc., 2005. All rights reserved.
Table 1. Pin Description
Pin Number 1 2 3 4 5 6 7 8 Pin Name ICLK Q1 Q2 Q3 Q4 GND VDD OE Pin Type Input Output Output Output Output Power Power Input Clock input, internal pull-up resistor Clock output(1) Clock output(1) Clock output(1) Clock output(1) Connect to ground(2) Connect to 3.3 V(2) Output enable, tri-states outputs when low, internal pull-up resistor Pin Description
1. A 33 series terminating resistor may be used on each clock output if the trace is longer than 1 inch. 2. A decoupling capacitor of 0.01 F should be connected between VDD on pin 7 and GND on pin 6, as close to the device as possible.
Table 2. Absolute Maximum Ratings(1)
Parameter Power Supply Voltage, VDD All Inputs and Outputs Ambient Operating Temperature Storage Temperature Junction Temperature Soldering Temperature Rating 3.9 -0.5 to VDD +0.5 -40 to +85 -65 to +150 175 260 Unit V V C C C C
1. Stresses above the ratings listed below can cause permanent damage to the device. These ratings are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range.
Table 3. DC Characteristics (VDD = 3.3 V 5%; Ambient Temperature = -40C to 85C)
Parameter Operating Voltage Input High Voltage(1), ICLK Input Low Voltage(1), ICLK Input High Voltage, OE Input Low Voltage, OE Ouput Low Voltage Output High Voltage Operating Supply Current Nominal Output Impedance Internal Pull-up Resistor Input Capacitance Symbol VDD VIH VIL VIH VIL VOL VOH IDD ZO RPU CIN CIN Short Circuit Current 1. Nominal switching threshold is VDD/2. IOS ICLK OE pin ICLK IOL = 12 mA IOH = -12 mA No load, 135 MHz 2.4 30 27 31 5 1 50 2 Conditions Min 3.15 VDD/2 + 0.7 Typ Max 3.45 3.8 VDD/2 - 0.7 VDD 0.8 0.4 Unit V V V V V V V mA k pF pF mA
MPC94551 2 Advanced Clock Drivers Devices Freescale Semiconductor
Table 4. AC Characteristics (VDD = 3.3 V 5%; Ambient Temperature = -40C to 85C)
Parameter Input Frequency Output Frequency(1) Output Clock Rise Time Output Clock Fall Time Propagation Delay(2) tOR tOF 15 pF load 0.8 V to 2.0 V 2.0 V to 0.8 V 135 MHz Rising edges at VDD/2 1.5 4 Symbol Condition Min 0 Typ Max 160 160 1.5 1.5 5 300 Unit MHz MHz ns ns ns ps
Output to Output Skew(3)
1. Measured with an external series resistor of 33 positioned close to each output pin 2. Measured with rail to rail input clock 3. Measured between any 2 outputs with equal loading
PACKAGE DIMENSIONS
A
8
D
5
C
E
1 4
H
0.25
M
B
M
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. DIMENSIONS ARE IN MILLIMETER. 3. DIMENSION D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS OF THE B DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.40 1.25 0 7
h B C e A
SEATING PLANE
X 45
L 0.10 A1 B 0.25
M
CB
S
A
S
DIM A A1 B C D E e H h L
D/EF SUFFIX SOIC PACKAGE CASE 751-06 ISSUE T
MPC94551 Advanced Clock Drivers Devices Freescale Semiconductor 3
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MPC94551 Rev. 3 2/2005

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