MC14580B Datasheet, PDF (1/7 Pages) Motorola, Inc – 4x4 Multiport Register

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Schottky TTL Load Over the Rated Temperature Range}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{• Pin Compatible with CD40108}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{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),
± 10
mA
per Pin
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
W0 W1 R0A R1A R0B R1B
8 9 13 14 11 10
CLOCK ¹⁶
WE ¹⁵
DATA
INPUT
20
19
18
17
D0
D1
D2
D3
DECODER
4X4
MEMORY
VDD = PIN 24
VSS = PIN 12
3–STATE A
3
Q0A
Q1A
Q2A
Q3A
4
5
6
7
Q0B
Q1B
Q2B
Q3B
22
23
2
1
21
3–STATE B
WORD A
OUTPUT
WORD B
OUTPUT
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14580B
L SUFFIX
CERAMIC
CASE 623
P SUFFIX
PLASTIC
CASE 709
DW SUFFIX
SOIC
CASE 751E
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBDW
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
PIN ASSIGNMENT
Q3B 1
Q2B 2
3–STATE A 3
Q0A 4
Q1A 5
Q2A 6
Q3A 7
WRITE 0 8
WRITE 1 9
READ 1B 10
READ 0B 11
VSS 12
24 VDD
23 Q1B
22 Q0B
21 3–STATE B
20 D0
19 D1
18 D2
17 D3
16 CLOCK
15 WE
14 READ 1A
13 READ 0A
MC14580B
1