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MC14580B Datasheet(PDF) 1 Page - Motorola, Inc

Part # MC14580B
Description  4x4 Multiport Register
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC14580B Datasheet(HTML) 1 Page - Motorola, Inc

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MOTOROLA CMOS LOGIC DATA
1
MC14580B
4 x 4 Multiport Register
The MC14580B is a 4 by 4 multiport register useful in small scratch pad
memories, arithmetic operations when coupled with an adder, and other data
storage applications. It allows independent reading of any two words (or the
same word at both outputs) while writing into any one of four words.
Address changing and data entry occur on the rising edge of the clock.
When the write enable input is low, the contents of any word may be
accessed but not altered.
• No Restrictions on Clock Input Rise or Fall Times
• 3–State Outputs
• Single Phase Clocking
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Capable of Driving Two Low–power TTL Loads or one Low–power
Schottky TTL Load Over the Rated Temperature Range
• Pin Compatible with CD40108
MAXIMUM RATINGS* (Voltages Referenced to VSS)
Symbol
Parameter
Value
Unit
VDD
DC Supply Voltage
– 0.5 to + 18.0
V
Vin, Vout Input or Output Voltage (DC or Transient)
– 0.5 to VDD + 0.5
V
Iin, Iout
Input or Output Current (DC or Transient),
per Pin
± 10
mA
PD
Power Dissipation, per Package†
500
mW
Tstg
Storage Temperature
– 65 to + 150
_C
TL
Lead Temperature (8–Second Soldering)
260
_C
* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/
_C From 65_C To 125_C
Ceramic “L” Packages: – 12 mW/
_C From 100_C To 125_C
BLOCK DIAGRAM
CLOCK
16
15
20
19
17
19
18
DATA
INPUT
WE
R1B
R0B
R1A
R0A
W1
W0
10
11
14
13
9
8
DECODER
3–STATE A
3
4
5
6
7
22
23
2
1
21
3–STATE B
4 X 4
MEMORY
VDD = PIN 24
VSS = PIN 12
D0
D1
D2
D3
Q0A
Q1A
Q2A
Q3A
Q0B
Q1B
Q2B
Q3B
WORD A
OUTPUT
WORD B
OUTPUT
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
© Motorola, Inc. 1995
REV 3
1/94
MC14580B
L SUFFIX
CERAMIC
CASE 623
ORDERING INFORMATION
MC14XXXBCP
Plastic
MC14XXXBCL
Ceramic
MC14XXXBDW
SOIC
TA = – 55° to 125°C for all packages.
P SUFFIX
PLASTIC
CASE 709
DW SUFFIX
SOIC
CASE 751E
PIN ASSIGNMENT
Q2A
Q0A
3–STATE A
Q2B
Q3B
WRITE 0
Q3A
Q1A
D0
3–STATE B
Q0B
Q1B
VDD
WE
CLOCK
D3
5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
13
11
12
21
22
23
24
READ 0A
READ 1A
D2
D1
READ 0B
VSS
READ 1B
WRITE 1


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