"TI-TRS3238E.pdf: RS232收发器特性及应用"
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更新于2023-12-22
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TI-TRS3238E.pdf is a datasheet for an RS232 transceiver, which is a high-performance, low-power, low-voltage, single-driver/receiver device designed for portable and battery-powered systems. The transceiver features a wide operating voltage range and is capable of operating over a -40°C to 85°C temperature range. It also offers a standby mode that reduces power consumption and extends battery life. The device is suitable for a variety of applications including portable instruments, notebook and palmtop computers, cellular phones, data loggers, and peripherals.
The transceiver features four drivers and three receivers, allowing for full-duplex data communication. It also includes a force-on and force-off control pin, as well as an invalid pin that is activated when the receiver output is disabled. The transceiver comes in a variety of package options, including DB, DW, PW, and RHB packages. The pin configuration and top view of each package are detailed in the datasheet.
In terms of electrical characteristics, the transceiver has a wide input voltage range, a low input threshold, and a high output drive. It also features a 3-state output with high impedance during power-off conditions, as well as a low-power shutdown mode. The device is equipped with built-in protection features such as short-circuit protection, thermal shutdown, and overvoltage protection.
In summary, the TI-TRS3238E.pdf datasheet provides detailed information about the RS232 transceiver, including its features, pin configuration, package options, and electrical characteristics. It is a versatile and high-performance device suitable for a wide range of portable and battery-powered applications. The datasheet serves as a valuable resource for engineers and designers looking to integrate the transceiver into their designs and develop innovative and reliable products.
www.ti.com
Absolute Maximum Ratings
(1)
Recommended Operating Conditions
(1)
Electrical Characteristics
(1)
TRS3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD (HBM) PROTECTION
SLLS797 – JUNE 2007
over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
V
CC
Supply voltage range
(2)
–0.3 6 V
V+ Positive-output supply voltage range
(2)
–0.3 7 V
V– Negative-output supply voltage range
(2)
0.3 –7 V
V+ – V– Supply voltage difference
(2)
13 V
Driver ( FORCEOFF, FORCEON) –0.3 6
V
I
Input voltage range V
Receiver –25 25
Driver –13.2 13.2
V
O
Output voltage range V
Receiver ( INVALID) –0.3 V
CC
+ 0.3
DB package 62
DW package 46
θ
JA
Package thermal impedance
(3) (4)
° C/W
PW package 62
RHB package PREVIEW
T
J
Operating virtual junction temperature 150 ° C
T
stg
Storage temperature range –65 150 ° C
(1) 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.
(2) All voltages are with respect to network GND.
(3) Maximum power dissipation is a function of T
J
(max), θ
JA
, and T
A
. The maximum allowable power dissipation at any allowable ambient
temperature is P
D
= (T
J
(max) – T
A
)/ θ
JA
. Operating at the absolute maximum T
J
of 150 ° C can affect reliability.
(4) The package thermal impedance is calculated in accordance with JESD 51-7.
See Figure 6
MIN NOM MAX UNIT
V
CC
= 3.3 V 3 3.3 3.6
Supply voltage V
V
CC
= 5 V 4.5 5 5.5
V
CC
= 3.3 V 2 5.5
DIN, FORCEOFF,
V
IH
Driver and control high-level input voltage V
FORCEON
V
CC
= 5 V 2.4 5.5
V
IL
Driver and control low-level input voltage DIN, FORCEOFF, FORCEON 0 0.8 V
V
I
Receiver input voltage –25 25 V
TRS3238EC 0 70
T
A
Operating free-air temperature ° C
TRS3238EI –40 85
(1) Testing supply conditions are C1–C4 = 0.1 μ F at V
CC
= 3.3 V ± 0.15 V; C1–C4 = 0.22 μ F at V
CC
= 3.3 V ± 0.3 V; and C1 = 0.047 μ F
and C2–C4 = 0.33 μ F at V
CC
= 5 V ± 0.5 V.
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6 )
PARAMETER TEST CONDITIONS MIN TYP
(2)
MAX UNIT
I
I
Input leakage current FORCEOFF, FORCEON ± 0.01 ± 1 μ A
Auto-powerdown plus No load,
0.5 2 mA
disabled FORCEOFF and FORCEON at V
CC
Supply current Powered off No load, FORCEOFF at GND 1 10
I
CC
(T
A
= 25 ° C)
No load, FORCEOFF at V
CC
,
μ A
Auto-powerdown plus
FORCEON at GND, 1 10
enabled
All RIN are open or grounded
(1) Testing supply conditions are C1–C4 = 0.1 μ F at V
CC
= 3.3 V ± 0.15 V; C1–C4 = 0.22 μ F at V
CC
= 3.3 V ± 0.3 V; and C1 = 0.047 μ F
and C2–C4 = 0.33 μ F at V
CC
= 5 V ± 0.5 V.
(2) All typical values are at V
CC
= 3.3 V or V
CC
= 5 V, and T
A
= 25 ° C.
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