MOTOROLA CMOS LOGIC DATA
51
MC14014B MC14021B
The MC14014B and MC14021B 8–bit static shift registers are constructed
with MOS P–channel and N–channel enhancement mode devices in a single
monolithic structure. These shift registers find primary use in parallel–to–
serial data conversion, synchronous and asynchronous parallel input, serial
output data queueing; and other general purpose register applications
requiring low power and/or high noise immunity.
• Synchronous Parallel Input/Serial Output (MC14014B)
• Asynchronous Parallel Input/Serial Output (MC14021B)
• Synchronous Serial Input/Serial Output
• Full Static Operation
• “Q” Outputs from Sixth, Seventh, and Eighth Stages
• Double Diode Input Protection
• 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
• MC14014B Pin–for–Pin Replacement for CD4014B
• MC14021B Pin–for–Pin Replacement for CD4021B
MAXIMUM RATINGS* (Voltages Referenced to V
SS
)
Input or Output Voltage (DC or Transient)
Input or Output Current (DC or Transient),
per Pin
Power Dissipation, per Package†
Lead Temperature (8–Second Soldering)
_
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
LOGIC DIAGRAM
CLOCK
D
S
P/S
P1 P2 P3 P6 P7 P8
7 6 5 14 15 1
10
11
9
DCQ DCQ DCQ DCQ DCQ D
CQ
Q Q
2 12 3
Q8Q7Q6
VDD = PIN 16
VSS = PIN 8
P4 = PIN 4
P5 = PIN 13
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1995
REV 3
1/94
L SUFFIX
CERAMIC
CASE 620
ORDERING INFORMATION
MC14XXXBCP Plastic
MC14XXXBCL Ceramic
MC14XXXBD SOIC
TA = – 55° to 125°C for all packages.
P SUFFIX
PLASTIC
CASE 648
D SUFFIX
SOIC
CASE 751B
TRUTH TABLE
Q6 Q7 Q8
t Clock DSP/S t=n+6 t=n+7 t=n+8
n 0 0 0 ? ?
n+1 1 0 1 0 ?
n+2 0 0 0 1 0
n+3 1 0 1 0 1
X 0 Q6 Q7 Q8
SERIAL OPERATION:
Clock
MC14014B MC14021B DSP/S Pn*Q
n
X X 1 0 0
X X 1 1 1
*Q6, Q7, & Q8 are available externally
PARALLEL OPERATION:
X = Don’t Care
MOTOROLA CMOS LOGIC DATAMC14014B MC14021B
52
ELECTRICAL CHARACTERISTICS (Voltages Referenced to V
SS
)
“0” Level
(VO = 4.5 or 0.5 Vdc)
(VO = 9.0 or 1.0 Vdc)
(VO = 13.5 or 1.5 Vdc)
“1” Level
(VO = 1.0 or 9.0 Vdc)
(VO = 1.5 or 13.5 Vdc)
Output Drive Current
(VOH = 2.5 Vdc) Source
(VOH = 4.6 Vdc)
(VOH = 9.5 Vdc)
(VOH = 13.5 Vdc)
– 4.2
– 0.88
– 2.25
– 8.8
(VOL = 0.4 Vdc) Sink
(VOL = 0.5 Vdc)
(VOL = 1.5 Vdc)
Input Capacitance
(Vin = 0)
Quiescent Current
(Per Package)
Total Supply Current**†
(Dynamic plus Quiescent,
Per Package)
(CL = 50 pF on all outputs, all
buffers switching)
IT = (0.75 µA/kHz) f + I
DD
IT = (1.50 µA/kHz) f + I
DD
IT = (2.25 µA/kHz) f + I
DD
µAdc
#Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
**The formulas given are for the typical characteristics only at 25_C.
†To calculate total supply current at loads other than 50 pF:
IT(CL) = IT(50 pF) + (CL – 50) Vfk
where: IT is in µA (per package), CL in pF, V = (VDD – VSS) in volts, f in kHz is input frequency, and k = 0.0015.
This device contains protection circuitry to guard against damage
due to high static voltages or electric fields. However, precautions must
be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, Vin and
V
out
should be constrained to the range VSS ≤ (Vin or V
out
) ≤ VDD.
Unused inputs must always be tied to an appropriate logic voltage
level (e.g., either VSS or VDD). Unused outputs must be left open.
PIN ASSIGNMENT
13
14
15
16
9
10
11
125
4
3
2
1
8
7
6
Q7
P5
P6
P7
V
DD
P/S
C
D
S
P4
Q8
Q6
P8
V
SS
P1
P2
P3