MOTOROLA CMOS LOGIC DATA
135
MC14034B
The MC14034B is a bidirectional 8–bit static parallel/serial, input/output
bus register. The device contains two sets of input/output lines which allows
the bidirectional transfer of data between two buses; the conversion of serial
data t o parallel form, or t he conversion of parallel data to serial form.
Additionally the serial data input allows data to be entered shift/right, while
shift/left can be accomplished by hard–wiring each parallel output to the
previous parallel bit input.
Other useful applications for this device include pseudo–random code
generation, sample and hold register, frequency and phase–comparator,
address or buffer register, and serial/parallel input/output conversions.
• Bidirectional Parallel Data Input
• Diode Protection on All Inputs
• 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.
• Pin–for–Pin Replacement for CD4034B.
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
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 623
ORDERING INFORMATION
MC14XXXBCP Plastic
MC14XXXBCL Ceramic
MC14XXXBDW SOIC
TA = – 55° to 125°C for all packages.
P SUFFIX
PLASTIC
CASE 709
DW SUFFIX
SOIC
CASE 751E
PIN ASSIGNMENT
B3
B5
B6
B7
B8
B1
B2
B4 A5
A6
A7
A8
V
DD
C
A1
A2
5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
13
11
12
21
22
23
24
P/S
A/S
A3
A4
A/B
V
SS
D
S
A ENABLE
MOTOROLA CMOS LOGIC DATAMC14034B
136
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)
– 1.2
– 0.25
– 0.62
– 1.8
– 0.7
– 0.14
– 0.35
– 1.1
(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 = (2.2 µA/kHz) f + I
DD
IT = (4.4 µA/kHz) f + I
DD
IT = (6.6 µA/kHz) f + I
DD
3–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 = 0.004.
MOTOROLA CMOS LOGIC DATA
137
MC14034B
SWITCHING CHARACTERISTICS* (C
L
= 50 pF, TA = 25_C)
Output Rise Time A or B
t
TLH
= (3.0 ns/pF) CL + 30 ns
t
TLH
= (1.5 ns/pF) CL + 15 ns
t
TLH
= (1.1 ns/pF) CL + 10 ns
Output Fall Time A or B
t
THL
= (1.5 ns/pF) CL + 25 ns
t
THL
= (0.75 ns/pF) CL + 12.5 ns
t
THL
= (0.55 ns/pF) CL + 9.5 ns
Propagation Delay Time
A (B) Synchronous Parallel Data Input,
B (A) Parallel Data Output
t
PLH
, t
PHL
= (1.7 ns/pF) CL + 440 ns
t
PHL
, t
PHL
= (0.66 ns/pF) CL + 172 ns
t
PLH
, t
PHL
= (0.5 ns/pF) CL + 120 ns
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Propagation Delay Time
A (B) Asynchronous Parallel Data Input
B (A) Parallel Data Output
t
PLH
, t
PHL
= (1.7 ns/pF) CL + 420 ns
t
PLH
, t
PHL
= (0.66 ns/pF) CL + 147 ns
t
PLH
, t
PHL
= (0.5 ns/pF) CL + 105 ns
ÎÎÎÎ
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High Level SE, P/S, A/S Pulse Width
ns
*The formulas given are for the typical characteristics only at 25_C.
#Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
TRUTH TABLE
“A” Enable P/S A/B A/S Mode Operation†
0 0 0 X Serial Synchronous Serial data input, A and B Parallel data outputs disabled.
0 0 1 X Serial Synchronous Serial data input, B–Parallel data output.
0 1 0 0 Parallel B Synchronous Parallel data inputs, A–Parallel data outputs disabled.
0 1 0 1 Parallel B Asynchronous Parallel data inputs, A–Parallel data outputs disabled.
0 1 1 0 Parallel A–Parallel data inputs disabled, B–Parallel data outputs.
0 1 1 1 Parallel A–Parallel data inputs disabled, B–Parallel data outputs.
1 0 0 X Serial Synchronous serial data input, A–Parallel data output.
1 0 1 X Serial Synchronous serial data input, B–Parallel data output.
1 1 0 0 Parallel B–Synchronous Parallel data input, A–Parallel data output.
1 1 0 1 Parallel B–Asynchronous Parallel data input, A–Parallel data output.
1 1 1 0 Parallel A–Synchronous Parallel data input, B–Parallel data output.
1 1 1 1 Parallel A–Asynchronous Parallel data input, B–Parallel data output.
X = Don’t Care
†Outputs change at positive transition of clock in the serial mode and when the A/S input is low in the parallel mode. During transfer from parallel
to serial operation, A/S should remain low in order to prevent DS transfer into flip–flops.