mc14c89b ON Semiconductor, mc14c89b Datasheet - Page 3

• Manufacturer Part Number: mc14c89b
• Description: Quad Low Power Line Receivers
• Manufacturer: ON Semiconductor

EIA−232−E (formerly RS−232), the newer EIA−562 (which is a
higher speed version of the EIA−232), and CCITT V.28
Recommendations. EIA−562 was written around modern integrated
circuit technology, whereas EIA−232 retains many of the
specifications written around the electro−mechanical circuitry in use
at the time of its creation. Yet the user will find enough similarities to
allow a certain amount of compatibility among equipment built to the
two standards. Following is a summary of the key specifications
relating to the systems and the receivers.
Max Data Rate
Max Cable Length
Transition Region
MARK (one, off)
SPACE (zero, on)
Fail Safe
Open Circuit Input Voltage
Slew Rate (at the driver)
Loaded Output Voltage (at the driver)
The MC14C89B and MC14C89AB are designed to comply with
S.G.
NOTES: S.G. set to: f = 20 kHz;
RC
(Open)
Duty Cycle = 50%;
t
r
, t
V
CC
f
Parameter
p 5.0 ns
50 pF
V
out
0 V
S.G.
V
out
20 kBaud
50 feet
−3.0 V to +3.0 V
More negative than −3.0 V
More positive than +3.0 V
Output = Binary 1
t⎥ 2.0 ⎜V
p30 V/μs anywhere on the waveform
5.0 V p ⎥ V
3.0 kΩ and 7.0 kΩ
3.0 V
STANDARDS COMPLIANCE
Figure 1. Timing Diagram
http://onsemi.com
O
t
PHL
1.5 V
⎜p 15 V for loads between
EIA−232−E
t
T
3
50%
90%
10%
38.4 kBaud Asynchronous
64 kBaud Synchronous
Based on cable capacitance/data rate
−3.0 V to +3.0 V
More negative than −3.3 V
More positive than +3.3 V
Output = Binary 1
Not Specified
p30 V/μs anywhere on the waveform,
q4.0 V/μs between +3.0 V and −3.0 V
⎥ V
O
⎜ q 3.7 V for a load of 3.0 kΩ
50%
t
PLH
t
T
EIA−562
V
V
OH
OL