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Texas Instruments 4Q 2006 Interface Selection Guide
UART Selection Guide
Asynchronous Communications Element
with Autoflow Control
The TL16C550D is a performance-enhanced
version of TI’s industry-standard TL16C550C
single-channel UART with 16-byte FIFO. The
TL16C550D can support voltages of down to
2.5 V and data transfer rates of up to 1.5
Mbps. Combining these features with an
ultra-small 32-pin QFN package, the
TL16C550D is ideal for a variety of portable
applications.
Key Features
•
Expanded voltage and package options
ideal for small form factors
•
Lower voltage
and higher frequency than
TL16C550C
• Pin-for-pin replacement for TL16C550C
• Programmable auto-RTS and auto-CTS
(autoflow)
Functional block diagram ( for PT and PFB packages)
I
nternal
Data Bus
Autoflow
Control
(AFE)
8
7
S
IN
R
CLK
R
TS
B
AUDOUT
SOUT
CTS
INTRPT
OUT2
OUT1
RI
DCD
DSR
DTR
5
3
2
12
4
–2
47–43
28
A0
A
1
A
2
CS0
C
S1
CS2
ADS
MR
RD1
RD2
WR2
WR1
DDIS
TXRDY
XIN
XOUT
RXRDY
V
CC
V
SS
27
2
6
9
10
11
24
3
5
19
20
16
17
22
23
14
15
29
42
18
D
(7–0)
8
8
38
33
39
40
41
34
31
30
88
8
8
8
8
Power
Supply
S
elect
and
Control
Logic
Receiver
F
IFO
Receiver
S
hift
Register
Receiver
T
iming and
Control
Transmitter
T
iming and
Control
Transmitter
Shift
Register
R
eceiver
Buffer
R
egister
D
ata
Bus
B
uffer
S
e
l
e
c
t
S
e
l
e
c
t
Line
Control
R
egister
Line
S
tatus
Register
Transmitter
Holding
Register
Modem
Control
Register
Modem
Status
Register
Modem
Control
Logic
Interrupt
Enable
Register
Interrupt
Control
Logic
Interrupt
Identification
Register
FIFO
Control
Register
Divisor
L
atch (MS)
Divisor
L
atch (LS)
B
aud
Generator
Transmitter
FIFO
• Up to 24/20/16-MHz clock rates for
up to 1.5/1.25/1-Mbps operation
• Programmable baud-rate generator
allows division to generate internal
16x clock
• Independent clock input receiver
•
Fully programmable serial interface
characteristics
• Available packages: DIP, PLCC,
TQFP and QFN
Applications
• PDAs
• MP3 players
• Gaming systems
• Modems
• Serial ports
•
T
elecom
TL16C550D Asynchronous Communications Element
Get samples, datasheets, EVMs and reports at: www.ti.com/sc/device/TL16C550D
Voltage Characterized
Device Channel(s) FIFOs (V) Temp. (°C) Package(s) Description Price
*
Universal Asynchronous Receiver/Transmitters (UARTs)
TL16C2550 2 16-Byte 1.8/2.5/3.3/5 –40 to 85 32 QFN, 44 PLCC, Dual UART with Programmable Auto-RTS and Auto-CTS 2.80
48 TQFP
TL16C2552 2 16-Byte 1.8/2.5/3.3/5 –40 to 85 32 QFN, 44 PLCC Dual UART with Programmable Auto-RTS and Auto-CTS 3.00
TL16C2752 2 64-Byte 1.8/2.5/3.3/5 — 44 PLCC Dual UART with Customizable Trigger Levels Call
TL16C450 1 None 5 0 to 70 40 DIP, 44 PLCC Single UART 1.50
TL16C451 1 None 5 0 to 70 68 PLCC Single UART with Parallel Port 2.50
TL16C452 2 None 5 0 to 70 68 PLCC Dual UART with Parallel Port 2.55
TL16C550C 1 16-Byte 3.3/5 –40 to 85 40 DIP, 44 PLCC, Single UART with Hardware Autoflow Control 1.75
48 LQFP, 48 TQFP
TL16C550D 1 16-Byte 2.5/3.3/5 –40 to 85 32 QFN Single UART with Hardware Autoflow Control 1.75
48 LQFP, 48 TQFP
TL16C552A 2 16-Byte 5 –40 to 85 68 PLCC, 80 TQFP Dual UART with Parallel Port 3.85
TL16C554A 4 16-Byte 5 –40 to 85 68 PLCC, 80 LQFP Quad UART with Hardware Autoflow Control 6.00
TL16C750 1 16/64-Byte 5 –40 to 85 44 PLCC, 64 LQFP Single UART with Hardware Autoflow Control, Low-Power Modes 3.70
TL16C752B 2 64-Byte 3.3 –40 to 85 48 LQFP, 48 TQFP Dual UART with Hardware Autoflow Control, Low-Power Modes 3.10
TL16C754B 4 64-Byte 3.3/5 –40 to 85 68 PLCC, 80 LQFP Dual UART with Hardware Autoflow Control, Low-Power Modes 8.35
TL16PC564B/BLV 1 16/64-Byte 3.3/5 0 to 70 100 BGA, 100 LQFP Single UART with PCMCIA Interface 5.90/6.10
TL16PIR552 2 16-Byte 5 0 to 70 80 QFP Dual UART with Selectable IR & 1284 Modes 6.10
*Suggested resale price in U.S. dollars in quantities of 1,000.
Functional block diagram.
UARTs (Universal Asynchronous Receiver/Transmitters)
17
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