Document Outline
- COVER
- FEATURES
- ORDERING INFORMATION
- BLOCK DIAGRAM/PIN CONFIGURATION (Top View)
- TRUTH TABLE
- ABSOLUTE MAXIMUM RATING (Ta = 25 degree)
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL SPECIFICATIONS (CHIP)
- ELECTRICAL SPECIFICATIONS (DRIVERS)
- ELECTRICAL SPECIFICATIONS (RECEIVERS)
- PACKAGE DRAWING
- RECOMMENDED SOLDERING CONDITIONS
- REFERENCE
1994
DATA SHEET
MOS INTEGRATED CIRCUIT
The
PD4726 is a high-voltage silicon gate CMOS line driver/receiver conforming to EIA/TIA-232-E Standards.
It contains a DC/DC converter and can operate with a +5 V single power supply. In addition, it is also provided with
ancillary functions such as a standby function.
This IC is equipped with four driver circuits and seven receiver circuits and can configure a simple RS-232 interface
circuit with only four external capacitors.
FEATURES
Conforms to EIA/TIA-32-E (old RS-232C) Standards
+5 V single power supply
A standby mode can be set by making the standby pin low to reduce the power dissipation. At this time, the driver
outputs go into a high-impedance state.
Two receiver circuits can operate as inverters without a hysteresis width even in the standby mode. The remaining
five receiver circuits are fixed to the high level.
ORDERING INFORMATION
Part Number
Package
Quality Grade
PD4726GS-BAF
36-pin plastic SSOP (300 mil)
Standard
Please refer to "Quality grade on NEC Semiconductor Devices" (Document number IEI-1209) published by NEC
Corporation to know the specification of quality grade on the devices and its recommended applications.
PD4726
Document No. IC-3413 (1st edition)
(O.D.No. IC-8923)
Date Published March 1997 P
Printed in Japan
RS-232 LINE DRIVER/RECEIVER
PD4726
2
BLOCK DIAGRAM/PIN CONFIGURATION (Top View)
Notes 1. V
DD
and V
SS
output internally boosted voltages. Do not connect a load directly to these pins.
2. It is recommended that capacitors having a breakdown voltage of 20 V or higher be used as C
1
through
C
5
. Inserting a bypass capacitor of 0.1 to 1
F in between V
CC
and GND is also recommended.
3. Be sure to connect all the GND pins. Especially, make sure that pin 31 is connected; otherwise, the
PD4726 will not operate normally. Be sure to leave the NC pins (pins 5 and 7) open.
4. The pull-up resistors for D
IN1
through D
IN4
and STBY and the pull-down resistor for EN are active resistors.
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
STBY
GND
EN
D
OUT1
D
OUT2
D
OUT3
D
OUT4
R
IN1
R
IN2
R
IN3
R
IN4
R
IN5
R
IN6
R
IN7
1
2
3
4
5
6
7
C
3
C
4
C
1
+
+
C
2
+
+
+10 V
-
10 V
+5 V
8
9
10
11
12
13
14
15
16
17
18
D
IN1
D
IN2
D
IN3
D
IN4
R
OUT1
R
OUT2
R
OUT3
R
OUT4
R
OUT5
R
OUT6
R
OUT7
To internal
circuit
V
DD
C
1
+
V
CC
C
1
-
N.C.
GND
N.C.
C
4
+
GND
C
4
-
V
SS
To internal
circuit
3
PD4726
TRUTH TABLE
Drivers
STBY
D
IN
D
OUT
Remarks
L
Z
Standby mode (DC/DC converter stops.)
H
L
H
Space level output
H
H
L
Mark level output
Receivers
STBY
EN
R
IN
R
OUT
Remarks
R
6
- R
7
R
1
- R
5
R
6
- R
7
R
1
- R
5
L
L
H
H
Standby mode 1 (DC/DC converter stops.)
L
H
L
H
H
Standby mode 2 (DC/DC converter stops. R
6
and R
7
operate.)
L
H
H
L
H
H
L
H
Mark level input
H
H
L
Space level input
H : high level
L : low level
Z : high impedance
: H or L
PD4726
4
ABSOLUTE MAXIMUM RATING (T
a
= 25
C)
Parameter
Symbol
Ratings
Unit
Supply voltage
V
CC
-
0.5 to +7.0
V
Driver input voltage
D
IN
-
0.5 to V
CC
+ 0.5
V
Receiver input voltage
R
IN
-
30.0 to +30.0
V
Control input voltage
V
IN
-
0.5 to V
CC
+ 0.5
V
(STBY, EN)
Driver output voltage
D
OUT
-
25.0 to +25.0
Note 5
V
Receiver output voltage
R
OUT
-
0.5 to V
CC
+ 0.5
V
Input current (D
IN
, STBY, EN)
I
INI
20.0
mA
Operating ambient temperature
T
opt.
-
40 to +85
C
Storage temperature
T
stg.
-
55 to +150
C
Permissible package power
P
T
0.5
W
dissipation
Note 5. Pulse width: 1 ms, duty cycle: 10 % MAX.
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
MIN.
TYP.
MAX.
Unit
Supply voltage (V
CHA
= L)
V
CC
4.5
5.0
5.5
V
Input voltage, high (D
IN
)
V
IH
2.0
V
CC
V
Input voltage, low (D
IN
)
V
IL
0
0.8
V
Input voltage, high (STBY, EN)
V
IH
2.4
V
CC
V
Input voltage, low (STBY, EN)
V
IL
0
0.8
V
Receiver input voltage
R
IN
-
30
+30
V
Operating ambient temperature
T
opt.
-
40
+85
C
External capacitance (nominal value)
Note 6
1
4.7
F
Note 6. Use capacitors whose capacitance fluctuation is within
50 % including fluctuations due to temperature
and tolerance (effective value: 0.5 to 7.05
F).
Use of capacitors with excellent high-frequency characteristics (such as multilayer ceramic capacitors,
tantalum capacitors, and aluminum electrolytic capacitors for switching power supply) is recommended.
Keep the wiring length between a capacitor and an IC pin as short as possible.
5
PD4726
ELECTRICAL SPECIFICATIONS (CHIP)
(Unless otherwise specified, T
a
=
-
40 to +85
C, C
1
through C
5
= 1
F)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Circuit current
I
CC1
V
CC
= +5.0 V, no load, R
IN
pin open,
12
mA
STBY = H
Circuit current
I
CC2
V
CC
= +5.0 V, R
L
= 3 k
(D
OUT
),
38
mA
D
IN
= GND, R
IN
, R
OUT
pins open,
STBY = H
Circuit current in standby
I
CC3
V
CC
= +5.0 V, no load,
9
20
A
mode (standby mode 1)
D
IN
, R
IN
pins open, STBY = L, EN = L,
T
a
= 25
C
V
CC
= +5.0 V, no load,
15
A
D
IN
, R
IN
pins open, STBY = L, EN = L,
Circuit current in standby
I
CC4
V
CC
= +5.0 V, no load,
9
20
A
mode (standby mode 2)
D
IN
, R
IN
pins open, STBY = L, EN = H,
T
a
= 25
C
V
CC
= +5.0 V, no load,
15
A
D
IN
, R
IN
pins open, STBY = L, EN = H,
T
a
= 25
C
Input voltage, high
V
IH
STBY, EN pins,
2.4
V
V
CC
= +4.5 to +5.5 V
Input voltage, low
V
IL
STBY, EN pins,
0.8
V
V
CC
= +4.5 to +5.5 V
Input current, high
I
IH
STBY pin, V
CC
= +5.5 V, V
I
= +5.5 V
1
A
Input current, low
I
IL
STBY pin, V
CC
= +5.5 V, V
I
= 0 V
-
40
A
Input current, high
I
IH
EN pin, V
CC
= +5.5 V, V
I
= +5.5 V
40
A
Input current, low
I
IL
EN pin, V
CC
= +5.5 V, V
I
= 0 V
-
1
A
Input capacitance
C
IN
Driver inputs and receiver inputs,
10
pF
V
CC
= +5.0 V, vs. GND, f = 1 MHz
Remark
TYP. value is a reference value at T
a
= 25
C.
PD4726
6
ELECTRICAL SPECIFICATIONS (DRIVERS)
(Unless otherwise specified, T
a
=
-
40 to +85
C, V
CC
= +5.0 V
10 %, C
1
through C
5
= 1
F)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Input voltage, low
V
IL
0.8
V
Input voltage, high
V
IH
2.0
V
Input current, low
I
IL
-
40
A
Input current, high
I
IH
1.0
A
Output voltage
V
DO
V
CC
= +5.0 V, R
L
=
, T
a
= 25
C
9.7
V
V
CC
= +5.0 V, R
L
= 3 k
, T
a
= T
opt.
5.5
V
V
CC
= +4.5 V, R
L
= 3 k
, T
a
= T
opt.
5.0
V
Output short current
I
SC
V
CC
= +5.0 V, vs. GND
40
mA
Slew rate
SR
C
L
= 10 pF, R
L
= 3 to 7 k
4.0
30
V/
s
C
L
= 2 500 pF, R
L
= 3 to 7 k
4.0
30
V/
s
Propagation delay time
Note 8
t
PHL
R
L
= 3 k
, C
L
= 2 500 pF
2
s
t
PLH
Output resistance
R
0
V
CC
= V
DD
= V
SS
= 0 V
300
V
OUT
=
2 V
Standby output transition time
t
DAZ
R
L
= 3 k
, C
L
= 2500 pF,
Note 9
4
10
s
Standby output transition time
t
DZA
R
L
= 3 k
, C
L
= 2500 pF,
Note 9
0.5
1
ms
Power-ON output transition time
t
PRA
R
L
= 3 k
, C
L
= 2500 pF,
Note 10
0.5
1
ms
Remark
TYP. value is a reference value at T
a
= 25
C.
Note 8. Test point
V
CC
D
IN
0 V
V
DO
+
D
OUT
V
DO
-
2.0 V
t
PHL
t
PLH
SR
+
SR
-
0.8 V
+5 V
+3 V
+3 V
-
3 V
-
5 V
-
3 V
7
PD4726
Note 9. Test point
The driver output is undefined during the standby output transition time t
DZA
. Do not perform communication within
the standby output transition time t
DZA
after the standby mode has been released.
Note 10. Test point
The driver output is undefined during the power-ON output transition time t
PRA
. Do not perform communication
within the power-ON output transition time t
PRA
on power application.
V
CC
STBY
0 V
V
DO
+
D
OUT
V
DO
-
2.4 V
t
DZA
High impedance
t
DAZ
0.6 V
+5 V
-
5 V
+5 V
-
5 V
5 V
V
CC
0 V
V
DO
+
D
OUT
V
DO
-
4.5 V
t
PRA
High impedance
+5 V
-
5 V
PD4726
8
ELECTRICAL SPECIFICATIONS (RECEIVERS)
(Unless otherwise specified, V
CC
= 4.5 to 5.5 V, T
a
=
-
40 to +85
C, C
1
through C
5
= 1
F)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Output voltage, low
V
OL1
I
OUT
= 4 mA
0.4
V
(STBY = H)
Output voltage, high
V
OH1
I
OUT
=
-
4 mA
V
CC
-
0.4
V
(STBY = H)
Output voltage, low
V
OL2
I
OUT
= 4 mA
0.5
V
(STBY = L)
Output voltage, high
V
OH2
I
OUT
=
-
4 mA
V
CC
-
0.5
V
(STBY = L)
Propagation delay time
t
PHL
R
IN
R
OUT
, C
L
=150 pF
0.2
s
(STBY = H)
t
PLH
V
CC
= +4.5 V,
Note 11
Propagation delay time
t
PHL
R
IN
R
OUT
(R
6
, R
7
), C
L
=150 pF
0.1
s
(STBY = L, EN = H)
t
PLH
V
CC
= +4.5 V,
Note 11
Propagation delay time
t
PHA
EN
R
OUT
(R
6
, R
7
), C
L
=150 pF
100
300
ns
(STBY = L)
t
PAH
V
CC
= +4.5 V,
Note 12
Input resistance
R
I
3
5.5
7
k
Open voltage across input pins
V
IO
0.5
V
Input threshold voltage
V
IH
V
CC
= +4.5 to +5.5 V
1.7
2.3
2.7
V
(STBY = H)
V
IL
V
CC
= +4.5 to +5.5 V
0.7
1.1
1.7
V
V
H
V
CC
= +4.5 to +5.5 V
0.5
1.2
1.8
V
(hysteresis width)
Input threshold voltage
V
IH
V
CC
= +4.5 to +5.5 V, R
IN6
, R
IN7
2.7
1.5
V
(STBY = L, EN = H)
V
IL
V
CC
= +4.5 to +5.5 V, R
IN6
, R
IN7
1.5
0.7
V
Standby output transition time
t
DAH
Note 13
0.2
3
s
Standby output transition time
t
DHA
Note 13
0.3
1
ms
Power-ON output transition time
t
PRA
Note 14
0.5
1
ms
Remark
TYP. value is a reference value at T
a
= 25
C.
Note 11. Test point
+3 V
R
IN
0 V
V
OH
R
OUT
V
OL
2.7 V
t
PHL
t
PLH
0.7 V
2.0 V
-
3 V
0.8 V
9
PD4726
Note 12. Test point
Note 13. Test point
The receiver output is undefined during the standby output transition time t
DHA
. Do not perform communication
within the standby output transition time t
DHA
after the standby mode has been released.
Note 14. Test point
The receiver output is undefined during the power-ON output transition time t
PRA
. Do not perform communication
within the power-ON output transition time t
PRA
on power application.
V
CC
STBY
0 V
V
OH
R
OUT
V
OL
2.4 V
t
DHA
t
DAH
0.6 V
2.0 V
0.8 V
5 V
V
CC
0 V
V
OH
R
OUT
V
OL
4.5 V
t
PRA
0.8 V
V
CC
EN
0 V
V
OH
R
OUT
V
OL
0.6 V
t
PAH
t
PHA
2.4 V
STBY = L
0.8 V
2.0 V
PD4726
10
36 PIN PLASTIC SHRINK SOP (300 mil)
B
E
L
K
F
G
I
H
J
A
1
18
19
36
detail of lead end
55
M
M
D
N
P36GM-80-300B-3
ITEM
MILLIMETERS
INCHES
A
B
C
D
E
F
G
H
I
J
K
15.54 MAX.
0.8 (T.P.)
1.8 MAX.
1.55
7.70.3
0.97 MAX.
0.612 MAX.
0.0050.003
0.071 MAX.
0.3030.012
0.220
0.039 MAX.
NOTE
L
M
0.10
0.60.2
1.1
5.6
0.004
0.024
+0.008
0.009
Each lead centerline is located within 0.10
mm (0.004 inch) of its true position (T.P.) at
maximum material condition.
0.043
0.061
0.031 (T.P.)
0.20
+0.10
0.05
0.008
+0.004
0.002
N
0.10
0.004
0.014
+0.004
0.003
0.35
0.1250.075
+0.10
0.05
C
11
PD4726
RECOMMENDED SOLDERING CONDITIONS
Solder and mount the
PD4726 under the following recommended conditions.
Consult NEC for conditions other than those recommended.
PD4726GS-BAF
Soldering method
Soldering conditions
Symbol
Infrared ray reflow
Peak temperature of package surface: 235
C,
IR35-00-2
Reflow time: Within 30 sec (210
C or higher),
Number of reflow process: 2, Exposure limit: None
Note
VPS
Peak temperature of package surface: 215
C,
VP15-00-2
Reflow time: Within 40 sec (200
C or higher),
Number of reflow process: 2, Exposure limit: None
Note
Wave soldering
Solder temperature: 260
C or lower, Reflow time: Within 10 sec,
WS60-00-1
Number of reflow process: 1, Exposure limit: None
Note
Partial heating
Pin temperature: 300
C or lower, Time: Within 10 sec,
Exposure limit: None
Note
Note
Exposure limit before soldering after dry-package is opened. Storage condition: 25
C and relative humidity
at 65 % or less.
Caution
Do not use two or more soldering methods in combination (except the partial heating method).
REFERENCE
Document name
Document No.
Semiconductor Device Mounting Technology Manual
IEI-1207
Quality grade on NEC Semiconductor Devices
IEI-1209
NEC Semiconductor Device Reliability/Quality Control system
IEI-1212
PD4726
No part of this document may be copied or reproduced in any form or by any means without the prior written
consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in
this document.
NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property
rights of third parties by or arising from use of a device described herein or any other liability arising from use
of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights or other
intellectual property rights of NEC Corporation or others.
While NEC Corporation has been making continuous effort to enhance the reliability of its semiconductor devices,
the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to persons or
property arising from a defect in an NEC semiconductor device, customers must incorporate sufficient safety
measures in its design, such as redundancy, fire-containment, and anti-failure features.
NEC devices are classified into the following three quality grades:
"Standard", "Special", and "Specific". The Specific quality grade applies only to devices developed based on a
customer designated "quality assurance program" for a specific application. The recommended applications of
a device depend on its quality grade, as indicated below. Customers must check the quality grade of each device
before using it in a particular application.
Standard: Computers, office equipment, communications equipment, test and measurement equipment,
audio and visual equipment, home electronic appliances, machine tools, personal electronic
equipment and industrial robots
Special:
Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster
systems, anti-crime systems, safety equipment and medical equipment (not specifically designed
for life support)
Specific:
Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems or medical equipment for life support, etc.
The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books.
If customers intend to use NEC devices for applications other than those specified for Standard quality grade,
they should contact an NEC sales representative in advance.
Anti-radioactive design is not implemented in this product.
M4 96.5
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