TL16C450 Datasheet, PDF (5/25 Pages) Texas Instruments – ASYNCHRONOUS COMMUNICATIONS ELEMENT

TL16C450
ASYNCHRONOUS COMMUNICATIONS ELEMENT
SLLS037B – MARCH 1988 – REVISED MARCH 1996
Terminal Functions (continued)
TERMINAL
NAME
NO.†
OUT1
34
OUT2
31
I/O
DESCRIPTION
O Outputs 1 and 2. OUT1 and OUT2 are user-designated output terminals that are set to their active states by
setting their respective modem control register bits (OUT1 and OUT2) high. OUT1 and OUT2 are set to their
inactive (high) states as a result of master reset or during loop mode operations or by clearing bit 2 (OUT1) or
bit 3 (OUT2) of the MCR.
RCLK
RI
RTS
9
I Receiver clock. RCLK is the 16 × baud rate clock for the receiver section of the ACE.
39
I Ring indicator. RI is a modem status signal. Its condition can be checked by reading bit 6 (RI) of the modem status
register. Bit 2 (TERI) of the modem status register indicates that the RI input has transitioned from a low to a high
state since the last read from the modem status register. If the modem status interrupt is enabled when this
transition occurs, an interrupt is generated.
32
O Request to send. When active, RTS informs the modem or data set that the ACE is ready to transmit data. RTS
is set to its active state by setting the RTS modem control register bit and is set to its inactive (high) state either
as a result of a master reset or during loop mode operations or by clearing bit 1 (RTS) of the MCR.
SIN
SOUT
10
I Serial input. SIN is the serial data input from a connected communications device.
11
O Serial output. SOUT is the composite serial data output to a connected communication device. SOUT is set to
the marking (set) state as a result of MR.
VCC
40
5-V supply voltage
VSS
20
Supply common
XTAL1
16 I/O External clock. XTAL1 and XTAL2 connect the ACE to the main timing reference (clock or crystal).
XTAL2
17
† _{Terminal numbers shown are for the N package.}
absolute maximum ratings over free-air temperature range (unless otherwise noted)^†
Supply voltage range, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range at any input, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Output voltage range, V_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Continuous total power dissipation at (or below) 70°C free-air temperature: FN package . . . . . . . 1100 mW
N package . . . . . . . . . 800 mW
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Case temperature for 10 seconds, T_C: FN package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: N package . . . . . . . . . . . . . . . . . . . . . 260°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.
NOTE 1: All voltage values are with respect to VSS.
recommended operating conditions
Supply voltage, VCC
High-level input voltage, VIH
Low-level input voltage, VIL
Operating free-air temperature, TA
MIN
4.75
2
– 0.5
0
NOM
5
MAX
5.25
VCC
0.8
70
UNIT
V
V
V
°C
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