MOTOROLA CMOS LOGIC DATAMC14503B
326
The MC14503B is a hex non–inverting buffer with 3–state outputs, and a
high current source and sink capability . The 3–state outputs make it useful in
common bussing applications. Two disable controls are provided. A high
level on the Disable A input causes the outputs of buffers 1 through 4 to go
into a high impedance state and a high level on the Disable B input causes
the outputs of buffers 5 and 6 to go into a high impedance state.
• 3–State Outputs
• TTL Compatible — Will Drive One TTL Load Over Full Temperature
Range
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Two Disable Controls for Added Versatility
• Pin for Pin Replacement for MM80C97 and 340097
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
*IN
n
*DISABLE
*INPUT
TO OTHER BUFFERS
V
SS
V
DD
OUT
n
*Diode protection on all inputs (not shown)
ONE OF TWO/FOUR BUFFERS
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.
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
D SUFFIX
SOIC
CASE 751B
LOGIC DIAGRAM
MC14XXXBCP Plastic
MC14XXXBCL Ceramic
MC14XXXBD SOIC
TRUTH TABLE
Appropriate
Disable
In
n
Input Out
n
0 0 0
1 0 1
X 1 High
Impedance
X = Don’t Care
DISABLE B
OUT 5
15
12
14
2
4
6
10
1
IN 5
IN 6
IN 1
IN 2
IN 3
IN 4
DISABLE A
OUT 6
OUT 1
OUT 2
OUT 3
OUT 4
11
13
3
5
7
9
VDD = PIN 16
VSS = PIN 8
MOTOROLA CMOS LOGIC DATA
327
MC14503B
ELECTRICAL CHARACTERISTICS (Voltages Referenced to V
SS
)
“0” Level
(VO = 3.6 or 1.4 Vdc)
(VO = 7.2 or 2.8 Vdc)
(VO = 11.5 or 3.5 Vdc)
“1” Level
(VO = 1.4 or 3.6 Vdc)
(VO = 2.8 or 7.2 Vdc)
(VO = 3.5 or 11.5 Vdc)
Output Drive Current
(VOH = 2.5 Vdc) Source
(VOH = 2.5 Vdc)
(VOH = 4.6 Vdc)
(VOH = 9.5 Vdc)
(VOH = 13.5 Vdc)
– 4.3
– 5.8
– 1.2
– 3.1
– 8.2
– 3.6
– 4.8
– 1.02
– 2.6
– 6.8
– 5.0
– 6.1
– 1.4
– 3.7
– 14.1
– 2.5
– 3.0
– 0.7
– 1.8
– 4.8
(VOL = 0.4 Vdc) Sink
(VOL = 0.4 Vdc)
(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 outputs switching,
50% Duty Cycle)
IT = (2.5 µA/kHz) f + I
DD
IT = (6.0 µA/kHz) f + I
DD
IT = (10 µA/kHz) f + I
DD
Three–State Output 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.