Texas Instruments Technology for Innovators 4Q 2006, Manual, Page: 17 / 49

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)
Internal
Data Bus
Autoflow
Control
(AFE)
8
7
SIN
RCLK
RTS
BAUDOUT
SOUT
CTS
INTRPT
OUT2
OUT1
RI
DCD
DSR
DTR
5
32
12
4–2
47–43
28
A0
A1
A2
CS0
CS1
CS2
ADS
MR
RD1
RD2
WR2
WR1
DDIS
TXRDY
XIN
XOUT
RXRDY
VCC
VSS
27
26
9
10
11
24
35
19
20
16
17
22
23
14
15
29
42
18
D(7–0)
8
8
38
33
39
40
41
34
31
30
8 8
8
8
8
8
Power
Supply
Select
and
Control
Logic
Receiver
FIFO
Receiver
Shift
Register
Receiver
Timing and
Control
Transmitter
Timing and
Control
Transmitter
Shift
Register
Receiver
Buffer
Register
Data
Bus
Buffer
S
e
l
e
c
t
S
e
l
e
c
t
Line
Control
Register
Line
Status
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
Latch (MS)
Divisor
Latch (LS)
Baud
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
• Telecom
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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