MOTOROLA CMOS LOGIC DATAMC14502B
320
The MC14502B is a strobed hex buffer/inverter with 3–state outputs, an
inhibit control, and guaranteed TTL drive over the temperature range. The
3–state output simplifies design by allowing a common bus.
• Separate Output Disable Control
• 3–State Output
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Capable of Driving 4LSTTL Loads Over the Rated Temperature Range
MAXIMUM RATINGS* (Voltages Referenced to V
SS
)
Input or Output Voltage (DC or Transient)
Input Current (DC or Transient), per Pin
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
CIRCUIT DIAGRAM
DISABLE
INHIBIT
D1
V
DD
V
SS
Q1
Other five buffers are identical
TRUTH TABLE
D
n
Inhibit Disable Q
n
0 0 0 1
1 0 0 0
X 1 0 0
X X 1 High
Impedance
X = Don’t Care
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1995
REV 3
1/94
L SUFFIX
CERAMIC
CASE 620
ORDERING INFORMATION
TA = – 55° to 125°C for all packages.
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
LOGIC DIAGRAM
MC14XXXBCP Plastic
MC14XXXBCL Ceramic
MC14XXXBDW SOIC
14 Q6
11 Q5
9 Q4
2 Q3
7 Q2
5 Q1
3–STATE
OUTPUT
DISABLE
INHIBIT 12
4
D1 3
D2 6
D3 1
D4 10
D5 13
D6 15
VDD = PIN 16
VSS = PIN 8
MOTOROLA CMOS LOGIC DATA
321
MC14502B
ELECTRICAL CHARACTERISTICS (Voltages Referenced to V
SS
)
“1” Level
Vin = 0 or V
DD
“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 = 0.5 or 4.5 Vdc)
(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 = (2.7 µA/kHz) f + I
DD
IT = (5.3 µA/kHz) f + I
DD
IT = (8.0 µA/kHz) f + I
DD
Three–State Leakage Current
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 = 0.006.
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
INH
D5
Q6
V
DD
Q4
D4
Q5
DISABLE
D1
Q3
D3
V
SS
Q2
D2
Q1
D6