GD75232
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS206C MAY 1995 REVISED JULY 1998
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Single Chip With Easy Interface Between
UART and Serial-Port Connector of IBM
TM
PC/AT
TM
and Compatibles
D
Meets or Exceeds the Requirements of
ANSI Standard TIA/EIA-232-F and ITU
Recommendation V.28
D
Designed to Support Data Rates up to
120 kbit/s
D
Pinout Compatible With SN75C185 and
SN75185
D
ESD Protection to 2 kV on Bus Terminals
D
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB) Packages, and DIPs (N)
description
The GD75232 combines three drivers and five receivers from TI
TM
trade-standard SN75188 and SN75189
bipolar quadruple drivers and receivers, respectively. The pinout matches the flow-through design of the
SN75C185 to decrease the part count, reduce the board space required, and allow easy interconnection of the
UART and serial-port connector of an IBM
TM
PC/AT
TM
and compatibles. The bipolar circuits and processing of
the GD75232 provide a rugged, low-cost solution for this function at the expense of quiescent power and
external passive components relative to the SN75C185.
The GD75232 complies with the requirements of the TIA/EIA-232-F and ITU (formerly CCITT) V.28 standards.
These standards are for data interchange between a host computer and a peripheral at signaling rates up to
20 kbit/s. The switching speeds of the GD75232 are fast enough to support rates up to 120 kbit/s with lower
capacitive loads (shorter cables). Interoperability at the higher signaling rates cannot be expected unless the
designer has design control of the cable and the interface circuits at both ends. For interoperability at signaling
rates up to 120 kbit/s, use of ANSI TIA/EIA-423-B (ITU V.10) and TIA/EIA-422-B (ITU V.11) standards is
recommended.
The GD75232 is characterized for operation over the temperature range of 0
C to 70
C.
Copyright
1998, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
RA1
RA2
RA3
DY1
DY2
RA4
DY3
RA5
V
SS
V
CC
RY1
RY2
RY3
DA1
DA2
RY4
DA3
RY5
GND
DB, DW, OR N PACKAGE
(TOP VIEW)
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TI is a trademark of Texas Instruments Incorporated.
IBM and PC/AT are trademarks of International Business Machines Corporation.
GD75232
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS206C MAY 1995 REVISED JULY 1998
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic symbol
9
8
7
6
5
4
3
2
RY5
DA3
RY4
DA2
DA1
RY3
RY2
RY1
RA5
DY3
RA4
DY2
DY1
RA3
RA2
RA1
12
13
14
15
16
17
18
19
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
logic diagram (positive logic)
RY1
RA1
RY2
RA2
RY3
RA3
DA1
DY1
DA2
DY2
RY4
RA4
DA3
DY3
RY5
RA5
2
3
4
5
6
7
8
9
19
18
12
13
14
15
16
17
schematic (each driver)
DYx Output
320
68.5
3.3 k
10.4 k
To Other Drivers
VSS
To Other
Drivers
GND
4.2 k
Input DAx
VDD
75.8
9.4 k
11.6 k
To Other Drivers
Resistor values shown are nominal.
GD75232
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS206C MAY 1995 REVISED JULY 1998
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
schematic (each receiver)
Input RAx
10 k
3.8 k
9 k
5 k
1.66 k
GND
RYx Output
VCC
To Other Receivers
Resistor values shown are nominal.
2 k
To Other Receivers
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
(see Note 1)
10 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply voltage, V
DD
(see Note 1)
15 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply voltage, V
SS
(see Note 1)
15 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
: Driver
15 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver
30 V to 30 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver output voltage range, V
O
15 V to 15 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver low-level output current, I
OL
20
mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 2): DB package
115
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package
97
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
67
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
2 60
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. All voltages are with respect to the network ground terminal.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
GD75232
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS206C MAY 1995 REVISED JULY 1998
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
MIN
NOM
MAX
UNIT
Supply voltage, VDD
7.5
9
15
V
Supply voltage, VSS
7.5
9
15
V
Supply voltage, VCC
4.5
5
5.5
V
High-level input voltage, VIH (driver only)
1.9
V
Low-level input voltage, VIL (driver only)
0.8
V
High level output current IOH
Driver
6
mA
High-level output current, IOH
Receiver
0.5
mA
Low level output current IOL
Driver
6
mA
Low-level output current, IOL
Receiver
16
mA
Operating free-air temperature, TA
0
70
C
supply currents over recommended operating free-air temperature range
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
VDD = 9 V,
VSS = 9 V
15
All inputs at 1.9 V,
No load
VDD = 12 V,
VSS = 12 V
19
mA
IDD
Supply current from VDD
VDD = 15 V,
VSS = 15 V
25
IDD
Supply current from VDD
VDD = 9 V,
VSS = 9 V
4.5
All inputs at 0.8 V,
No load
VDD = 12 V,
VSS = 12 V
5.5
mA
VDD = 15 V,
VSS = 15 V
9
VDD = 9 V,
VSS = 9 V
15
All inputs at 1.9 V,
No load
VDD = 12 V,
VSS = 12 V
19
mA
ISS
Supply current from VSS
VDD = 15 V,
VSS = 15 V
25
ISS
Supply current from VSS
VDD = 9 V,
VSS = 9 V
3.2
All inputs at 0.8 V,
No load
VDD = 12 V,
VSS = 12 V
3.2
mA
VDD = 15 V,
VSS = 15 V
3.2
ICC
Supply current from VCC
VCC = 5 V,
All inputs at 5,
No load
30
mA
GD75232
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS206C MAY 1995 REVISED JULY 1998
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended operating free-air temperature range, V
DD
= 9 V,
V
SS
= 9 V, V
CC
= 5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH
High-level output voltage
VIL = 0.8 V,
RL = 3 k
,
See Figure 1
6
7.5
V
VOL
Low-level output voltage (see Note 3)
VIH = 1.9 V,
RL = 3 k
,
See Figure 1
7.5
6
V
IIH
High-level input current
VI = 5 V,
See Figure 2
10
A
IIL
Low-level input current
VI = 0,
See Figure 2
1.6
mA
IOS(H)
High-level short-circuit output current
(see Note 4)
VIL = 0.8 V,
VO = 0,
See Figure 1
4.5
12
19.5
mA
IOS(L)
Low-level short-circuit output current
VIH = 2 V,
VO = 0,
See Figure 1
4.5
12
19.5
mA
rO
Output resistance (see Note 5)
VCC = VDD = VSS = 0,
VO = 2 V to 2 V
300
NOTES:
3. The algebraic convention, where the more positive (less negative) limit is designated as maximum, is used in this data sheet for logic
levels only (e.g., if 10 V is maximum, the typical value is a more negative voltage).
4. Output short-circuit conditions must maintain the total power dissipation below absolute maximum ratings.
5. Test conditions are those specified by TIA/EIA-232-F and as listed above.
switching characteristics, V
CC
= 5 V, V
DD
= 12 V, V
SS
= 12 V, T
A
= 25
C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
Propagation delay time,
low- to high-level output
RL = 3 k
to 7 k
CL = 15 pF
See Figure 3
315
500
ns
tPHL
Propagation delay time,
high- to low-level output
RL = 3 k
to 7 k
,
CL = 15 pF,
See Figure 3
75
175
ns
tTLH
Transition time, low- to
RL = 3 k
to 7 k
,
CL = 15 pF,
See Figure 3
60
100
ns
tTLH
,
high-level output
RL = 3 k
to 7 k
,
CL = 2500 pF,
See Figure 3 and Note 6
1.7
2.5
s
tTHL
Transition time, high- to
RL = 3 k
to 7 k
,
CL = 15 pF,
See Figure 3
40
75
ns
tTHL
,
g
low-level output
RL = 3 k
to 7 k
,
CL = 2500 pF,
See Figure 3 and Note 6
1.5
2.5
s
NOTE 6: Measured between
3-V and
3-V points of the output waveform ( TIA/EIA-232-F conditions), all unused inputs are tied either high
or low.
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