MC14517B Datasheet, PDF (1/6 Pages) ON Semiconductor – Dual 64-Bit Static Shift Register

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC14517B
Dual 64-Bit Static Shift Register
The MC14517B dual 64–bit static shift register consists of two identical,
independent, 64–bit registers. Each register has separate clock and write
enable inputs, as well as outputs at bits 16, 32, 48, and 64. Data at the data
input is entered by clocking, regardless of the state of the write enable input.
An output is disabled (open circuited) when the write enable input is high.
During this time, data appearing at the data input as well as the 16–bit,
32–bit, and 48–bit taps may be entered into the device by application of a
clock pulse. This feature permits the register to be loaded with 64 bits in 16
clock periods, and also permits bus logic to be used. This device is useful in
time delay circuits, temporary memory storage circuits, and other serial shift
register applications.
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
• Diode Protection on All Inputs
• Fully Static Operation
• Output Transitions Occur on the Rising Edge of the Clock Pulse
• Exceedingly Slow Input Transition Rates May Be Applied to the Clock
Input
• 3–State Output at 64th–Bit Allows Use in Bus Logic Applications
• Shift Registers of any Length may be Fully Loaded with 16 Clock Pulses
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{• Capable of Driving Two Low–power TTL Loads or One Low–power}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{Schottky TTL Load Over the Rated Temperature Range}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{MAXIMUM RATINGS (Voltages referenced to VSS)}
Symbol
Parameter
Value
Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{VDD DC Supply Voltage}
– 0.5 to + 18.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Vin, Vout Input or Output Voltage (DC or Transient) – 0.5 to VDD + 0.5 V}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Iin, Iout Input or Output Current (DC or Transient),}
± 10
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{per Pin}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ PD Power Dissipation, per Package†
500
mW
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Tstg Storage Temperature
– 65 to + 150
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^TL
Lead Temperature (8–Second Soldering)
260
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{* 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
DW SUFFIX
SOIC
CASE 751G
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBDW
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
PIN ASSIGNMENT
Q16A 1
Q48A 2
WEA 3
CA 4
Q64A 5
Q32A 6
DA 7
VSS 8
16 VDD
15 Q16B
14 Q48B
13 WEB
12 CB
11 Q64B
10 Q32B
9 DB
FUNCTIONAL TRUTH TABLE (X = Don’t Care)
Write
Clock Enable
Data
16–Bit Tap
32–Bit Tap
48–Bit Tap
64–Bit Tap
0
0
X
Content of 16–Bit Content of 32–Bit Content of 48–Bit Content of 64–Bit
Displayed
Displayed
Displayed
Displayed
0
1
X
High Impedance High Impedance High Impedance High Impedance
1
0
X
Content of 16–Bit Content of 32–Bit Content of 48–Bit Content of 64–Bit
Displayed
Displayed
Displayed
Displayed
1
1
X
High Impedance High Impedance High Impedance High Impedance
0
Data entered Content of 16–Bit Content of 32–Bit Content of 48–Bit Content of 64–Bit
into 1st Bit
Displayed
Displayed
Displayed
Displayed
1
Data entered
Data at tap
Data at tap
Data at tap
High Impedance
into 1st Bit entered into 17–Bit entered into 33–Bit entered into 49–Bit
0
X
Content of 16–Bit Content of 32–Bit Content of 48–Bit Content of 64–Bit
Displayed
Displayed
Displayed
Displayed
1
X
High Impedance High Impedance High Impedance High Impedance
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14517B
403