MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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by MC145705/D
MC145705
Product Preview
5 Volt Only
Driver/Receiver with an
Integrated Standby Mode
MC145706
MC145707
EIA–232–E and CCITT V.28
20
P SUFFIX
PLASTIC DIP
CASE 738
1
The MC145705/06/07 are a series of silicon–gate CMOS transceiver ICs that
fulfill the electrical specifications of EIA–232–E and CCITT V.28 while operating
from a single + 5 V power supply. These transceiver series are high
performance and low power consumption devices that are equipped with
standby and output enable function.
A voltage doubler and inverter convert the + 5 V to
±
10 V. This is
accomplished through an on–board 20 kHz oscillator and four inexpensive
external electrolytic capacitors.
The MC145705 is composed of two drivers and three receivers, the
MC145706 has three drivers and two receivers, and the MC145707 has three
drivers and three receivers. These drivers and receivers are virtually identical to
those of the MC145407.
Available Driver/Receiver Combinations
Device
MC145705
MC145706
MC145707
Drivers
2
3
3
Receivers
3
2
3
No. of Pins
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
24
1
P SUFFIX
PLASTIC DIP
CASE 724
24
20
20
24
DW SUFFIX
SOG PACKAGE
CASE 751E
1
ORDERING INFORMATION
MC145705P
MC145706P
MC145707P
MC145705DW
MC145706DW
MC145707DW
Plastic DIP
Plastic DIP
Plastic DIP
SOG Package
SOG Package
SOG Package
Drivers:
• ±
7.5 Output Swing
•
300
Ω
Power–Off Impedance
•
Output Current Limiting
•
TTL and CMOS Compatible Inputs
•
Three–State Outputs During Standby Mode
•
Hold Output OFF (MARK) State by TxEN Pin
Receivers:
• ±
25 V Input Range
•
3 to 7 kΩ Input Impedance
•
0.8 V Hysteresis for Enhanced Noise Immunity
•
Three–State Outputs During Standby Mode
Charge Pumps:
•
+ 5 to
±
10 V Dual Charge Pump Architecture
•
Supply Outputs Capable of Driving Three Drivers on the MC145403/06
Simultaneously
•
Requires Four Inexpensive Electrolytic Capacitors
•
On–Chip 20 kHz Oscillators
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
REV 1
8/95
©
Motorola, Inc. 1995
MOTOROLA
MC145705•MC145706•MC145707
1
PIN ASSIGNMENTS
MC145705
2 DRIVERS/3 RECEIVERS
C2+
GND
C2–
VSS
STB
Rx1
Rx2
Tx1
Rx3
Tx2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
C1+
VCC
C1–
VDD
TxEN
DO1
DO2
DI1
DO3
DI2
C2+
GND
C2–
VSS
STB
Tx1
Rx1
Tx2
Rx2
Tx3
MC145706
3 DRIVERS/2 RECEIVERS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
C1+
VCC
C1–
VDD
TxEN
DI1
DO1
DI2
DO2
DI3
MC145707
3 DRIVERS/3 RECEIVERS
C2+
GND
C2–
VSS
STB
NC
Rx1
Tx1
Rx2
Tx2
Rx3
Tx3
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
C1+
VCC
C1–
VDD
TxEN
NC
DO1
DI1
DO2
DI2
DO3
DI3
NC = NO CONNECTION
MC145705•MC145706•MC145707
2
MOTOROLA
FUNCTION DIAGRAM
CHARGE PUMPS
OSC
VCC
VOLTAGE
DOUBLER
VOLTAGE
INVERTER
GND
C3
+
+
C4
VDD
C1–
C1
+
C1+
C2+
+
C2
C2–
VSS
RECEIVER
VDD
VDD
*
15 kΩ
+
–
5.4 kΩ
VSS
STB
VCC
DO
1.0 V
* Protection Circuit
1.8 V
DRIVER
VDD
STB
TxEN
VCC
VCC
300
Ω
Tx
LEVEL
SHIFT
+
–
DI
1.4 V
VSS
MOTOROLA
MC145705•MC145706•MC145707
3
MAXIMUM RATINGS
(Voltage Polarities Referenced to GND)
Rating
DC Supply Voltage
Input Voltage
DC Current per Pin
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Rx1 – Rx3 Inputs
DI1 – DI3 Inputs
Symbol
VCC
VIR
I
PD
TA
Tstg
Value
– 0.5 to + 6.0
VSS – 15 to VDD + 15
0.5 to VCC + 15
±
100
1
– 40 to + 85
– 85 to + 150
Unit
V
V
mA
W
°C
°C
This device contains protection circuitry to
guard against damage due to high static
voltages or electric fields. However, precau-
tions must be taken to avoid applications of any
voltage higher than maximum rated voltages to
this high–impedance circuit. For proper opera-
tion, it is recommended that the voltage at
the DI and DO pins be constrained to the range
GND
≤
VDI
≤
VDD and GND
≤
VDO
≤
V CC.
Also, the voltage at the Rx pin should be
constrained to (VSS – 15 V)
≤
V Rx1 – Rx3
≤
(VDD + 15 V), and Tx should be constrained
to VSS
≤
VTx1 – Tx3
≤
VDD.
Unused inputs must always be tied to an
appropriate logic voltage level (e.g., GND or
VCC for DI, and GND for Rx).
RECOMMENDED OPERATING LIMITS
Parameter
Power Supply
Operating Temperature Range
Symbol
VCC
TA
Min
4.5
– 40
Typ
5
—
Max
5.5
85
Unit
V
°C
DC ELECTRICAL CHARACTERISTICS
(Voltage polarities referenced to GND = 0 V; C1 – C4 = 10
µF;
TA = – 40 to + 85°C)
Parameter
DC Power Supply
Quiescent Supply Current (Output Unloaded, Input Low)
Quiescent Supply Current (Standby Mode) (Output Unloaded, Input Open)
Control Signal Input Voltage (STB, TxEN)
Control Signal Input Current
Charge Pumps Output Voltage (C1, C2, C3, C4 = 10
µF)
Output Voltage (VDD)
Logic Low
Logic High
Logic Low (TxEN)
Logic High (STB)
Iload = 0 mA
Iload = 5 mA
Iload = 10 mA
Iload = 0 mA
Iload = 5 mA
Iload = 10 mA
VSS
Symbol
VCC
ICC
ICC(STB)
VIL
VIH
IIL
IIH
VDD
8.5
7.5
6.0
– 8.5
– 7.5
– 6.0
10.0
9.5
9.0
– 10.0
– 9.2
– 8.6
11
—
—
– 11
—
—
Min
4.5
—
—
—
VCC – 0.5
—
—
Typ
5
1.7
< 10
—
—
—
—
Max
5.5
3.5
20
0.5
—
– 10
10
Unit
V
mA
µA
V
µA
V
Output Voltage (VSS)
RECEIVER ELECTRICAL SPECIFICATIONS
(Voltage polarities referenced to GND = 0 V; VCC = + 5 V
±
10%; C1 – C4 = 10
µF;
TA = – 40 to + 85°C)
Parameter
Input Turn–On Threshold (VDO1 – DO3 = VOL)
Input Turn–Off Threshold (VDO1 – DO3 = VOH)
Input Threshold Hysteresis (Von = Voff)
Input Resistance
High–Level Output Voltage (DO1 – DO3)
VRx1 – Rx3 = – 3 to – 25 V
Low–Level Output Voltage (DO1 – DO3)
VRx1 – Rx3 = + 3 to + 25 V
Iout = – 20
µA
Iout = – 1 mA
Iout = + 20
µA
Iout = + 1.6 mA
Rx1 – Rx3
Rx1 – Rx3
Rx1 – Rx3
Symbol
Von
Voff
Vhys
Rin
VOH
VOL
Min
1.35
0.75
0.6
3
VCC – 0.1
VCC – 0.7
—
—
Typ
1.8
1
0.8
5.4
—
4.3
0.01
0.5
Max
2.35
1.25
—
7
—
—
0.1
0.7
Unit
V
V
V
kΩ
V
V
MC145705•MC145706•MC145707
4
MOTOROLA
DRIVER ELECTRICAL SPECIFICATIONS
(Voltage polarities referenced to GND = 0 V; VCC = + 5 V
±
10%; C1 – C4 = 10
µF;
TA = – 40 to + 85°C)
Parameter
Digital Input Voltage
Logic Low
Logic High
Input Current
VDI = GND
VDI = VCC
Output High Voltage
(VDI1 – DI3 = Logic Low, RL = 3 kΩ)
Output Low Voltage
(VDI1 – DI3 = Logic High, RL = 3 kΩ)
Off Source Impedance
Output Short Circuit Current (VCC = 5.5 V)
Tx1 – Tx3 Shorted to GND**
Tx1 – Tx3 Shorted to
±
15 V***
DI1 – DI3
VIL
VIH
DI1 – DI3
IIL
IIH
Tx1 – Tx3
Tx1 – Tx6*
Tx1 – Tx3
Tx1 – Tx6*
Tx1 – Tx3
VOH
VOL
Zoff
ISC
—
—
—
—
—
—
6
5
–6
–5
300
7
—
7.5
6.5
– 7.5
– 6.5
—
—
±
1.0
—
—
—
—
—
±
60
±
100
V
V
Ω
mA
—
2
—
—
0.8
—
µA
Symbol
Min
Typ
Max
Unit
V
* Specifications for a MC14570X powering a MC145406 or MC145403 with three additional drivers/receivers.
** Specification is for one Tx output to be shorted at a time. Should all three driver outputs be shorted simultaneously, device power dissipation
limits could be exceeded.
*** This condition could exceed package limitations.
SWITCHING CHARACTERISTICS
(VCC = + 5 V,
±
10%; C1 – C4 = 10
µF;
TA = – 40 to + 85°C)
Parameter
Symbol
Min
Typ
Max
Unit
Drivers
Propagation Delay Time
Low–to–High
(RL = 3 kΩ, CL = 50 pF or 2500 pF)
High–to–Low
(RL = 3 kΩ, CL = 50 pF or 2500 pF)
Output Slew Rate
Minimum Load (RL = 7 kΩ, CL = 0 pF)
Maximum Load (RL = 3 kΩ, CL = 2500 pF)
Output Disable Time
Output Enable Time
tDAZ
tDZA
Tx1 – Tx3
Tx1 – Tx3
tPLH
—
tPHL
—
SR
—
—
—
—
±
6
±
5
4
25
±
30
—
10
50
µs
ms
0.5
1
V/µs
0.5
1
µs
Receivers
Propagation Delay Time
Low–to–High
High–to–Low
Output Rise Time
Output Fall Time
Output Disable Time
Output Enable Time
DO1 – DO3
DO1 – DO3
DO1 – DO3
tPLH
—
tPHL
tr
tf
tRAZ
tRZA
—
—
—
—
—
—
—
250
40
4
25
1
1
400
100
10
50
ns
ns
µs
ms
µs
TRUTH TABLE
Drivers
DI
X
X
H
L
TxEN
X
L
H
H
STB
H
L
L
L
X = Don’t Care
Tx
Z*
L
L
H
Receivers
Rx
X
H
L
STB
H
L
L
DO
Z*
L
H
X = Don’t Care
* GND
≤
VDO
≤
VCC
* VSS
≤
VTx
≤
VDD
MOTOROLA
MC145705•MC145706•MC145707
5
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