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MC145705 데이터시트 PDF




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부품번호 MC145705 기능
기능 (MC145706 / MC145707) 5 Volt Only Driver/Receiver with an Integrated Standby Mode
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MC145705 데이터시트, 핀배열, 회로
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Product Preview
5 Volt Only
Driver/Receiver with an
Integrated Standby Mode
EIA–232–E and CCITT V.28
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
Drivers Receivers No. of Pins
MC145705
2
3
20
MC145706
3
2
20
MC145707
3
3
24
Drivers:
• ± 7.5 Output Swing
300 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 kInput 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
Order this document
by MC145705/D
MC145705
MC145706
MC145707
20
1
20
1
P SUFFIX
PLASTIC DIP
CASE 738
DW SUFFIX
SOG PACKAGE
CASE 751D
24
1
P SUFFIX
PLASTIC DIP
CASE 724
24
1
DW SUFFIX
SOG PACKAGE
CASE 751E
ORDERING INFORMATION
MC145705P
MC145706P
MC145707P
Plastic DIP
Plastic DIP
Plastic DIP
MC145705DW
MC145706DW
MC145707DW
SOG Package
SOG Package
SOG Package
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
©MOMoTtoOroRla,OInLc.A1995
MC145705MC145706MC145707
1




MC145705 pdf, 반도체, 판매, 대치품
MAXIMUM RATINGS (Voltage Polarities Referenced to GND)
Rating
Symbol
Value
DC Supply Voltage
Input Voltage
Rx1 – Rx3 Inputs
DI1 – DI3 Inputs
DC Current per Pin
VCC
VIR
I
– 0.5 to + 6.0
VSS – 15 to VDD + 15
0.5 to VCC + 15
± 100
Power Dissipation
Operating Temperature Range
Storage Temperature Range
PD 1
TA – 40 to + 85
Tstg – 85 to + 150
Unit
V
V
mA
W
°C
°C
RECOMMENDED OPERATING LIMITS
Parameter
Power Supply
Operating Temperature Range
Symbol
VCC
TA
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 VCC.
Also, the voltage at the Rx pin should be
constrained to (VSS – 15 V) VRx1 – 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).
Min Typ Max Unit
4.5 5 5.5 V
– 40 —
85 °C
DC ELECTRICAL CHARACTERISTICS (Voltage polarities referenced to GND = 0 V; C1 – C4 = 10 µF; TA = – 40 to + 85°C)
Parameter
Symbol
Min
Typ
Max
DC Power Supply
Quiescent Supply Current (Output Unloaded, Input Low)
VCC
4.5
5
5.5
ICC — 1.7 3.5
Quiescent Supply Current (Standby Mode) (Output Unloaded, Input Open)
Control Signal Input Voltage (STB, TxEN)
Logic Low
Logic High
ICC(STB)
VIL
VIH
VCC – 0.5
< 10
20
0.5
Control Signal Input Current
Logic Low (TxEN)
IIL
— – 10
Logic High (STB)
IIH
10
Charge Pumps Output Voltage (C1, C2, C3, C4 = 10 µF)
Output Voltage (VDD)
Output Voltage (VSS)
Iload = 0 mA
Iload = 5 mA
Iload = 10 mA
Iload = 0 mA
Iload = 5 mA
Iload = 10 mA
VDD
VSS
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
Unit
V
mA
µA
V
µA
V
RECEIVER ELECTRICAL SPECIFICATIONS
(Voltage polarities referenced to GND = 0 V; VCC = + 5 V ± 10%; C1 – C4 = 10 µF; TA = – 40 to + 85°C)
Parameter
Symbol
Min
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
Rx1 – Rx3
Rx1 – Rx3
Rx1 – Rx3
Iout = – 20 µA
Iout = – 1 mA
Iout = + 20 µA
Iout = + 1.6 mA
Von
Voff
Vhys
Rin
VOH
VOL
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 Unit
2.35 V
1.25 V
—V
7 k
—V
0.1 V
0.7
MC145705MC145706MC145707
4
MOTOROLA

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MC145705 전자부품, 판매, 대치품
ESD PROTECTION
ESD protection on IC devices that have their pins accessi-
ble to the outside world is essential. High static voltages ap-
plied to the pins when someone touches them either directly
or indirectly can cause damage to gate oxides and transistor
junctions by coupling a portion of the energy from the I/O pin
to the power supply buses of the IC. This coupling will usually
occur through the internal ESD protection diodes which are
designed to do just that. The key to protecting the IC is to
shunt as much of the energy to ground as possible before it
enters the IC. The figure below shows a technique which will
clamp the ESD voltage at approximately ± 15 V using the
MMBZ15VDLT1. Any residual voltage which appears on the
supply pins is shunted to ground through the capacitors C1
and C2.
MMBZ15VDLT1
C2+ 1
GND 2
C2–
3
VSS 4
STB
5
NC
6
Rx1 7
24 C1+
VCC
23
22 C1–
21 VDD
20 TxEN
19 NC
18 DO1
0.1 µF
Tx1 8
17 DI1
Rx2 9
Tx2 10
16 DO2
15 DI2
Rx3 11
Tx3 12
14 DO3
13 DI3
MOTOROLA
MC145705MC145706MC145707
7

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MC145705

(MC145706 / MC145707) 5 Volt Only Driver/Receiver with an Integrated Standby Mode

Motorola Semiconductors
Motorola Semiconductors

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