SC16C554BIBS,557 NXP Semiconductors, SC16C554BIBS,557 Datasheet - Page 21

• Manufacturer Part Number: SC16C554BIBS,557
• Description: IC UART QUAD SOT778-3
• Manufacturer: NXP Semiconductors

Specifications of SC16C554BIBS,557

• Number Of Channels: 4, QUART
• Fifo's: 16 Byte
• Voltage - Supply: 2.5V, 3.3V, 5V
• With Auto Flow Control: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 48-VQFN Exposed Pad, 48-HVQFN, 48-SQFN, 48-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935279072557; SC16C554BIBS; SC16C554BIBS

NXP Semiconductors
SC16C554B_554DB
Product data sheet
A single baud rate generator is provided for the transmitter and receiver, allowing
independent TX/RX channel control. The programmable Baud Rate Generator is capable
of accepting an input clock up to 80 MHz (for 3.3 V and 5 V operation), as required for
supporting a 5 Mbit/s data rate. The SC16C554B/554DB can be configured for internal or
external clock operation. For internal clock oscillator operation, an industry standard
microprocessor crystal (parallel resonant/22 pF to 33 pF load) is connected externally
between the XTAL1 and XTAL2 pins (see
be connected to the XTAL1 pin to clock the internal baud rate generator for standard or
custom rates (see
Programming the Baud Rate Generator registers DLM (MSB) and DLL (LSB) provides a
user capability for selecting the desired final baud rate.
Table 8.
Output baud rate
(bit/s)
200
1200
2400
4800
9600
19.2 k
38.4 k
76.8 k
153.6 k
230.4 k
460.8 k
Fig 13. Crystal oscillator connection
Baud rate generator programming table using a 7.3728 MHz clock
All information provided in this document is subject to legal disclaimers.
Table
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs
User 16× clock divisor
Decimal
2304
384
192
96
48
24
12
6
3
2
1
XTAL1
Rev. 4 — 8 June 2010
8).
1.8432 MHz
C1
22 pF
X1
XTAL2
C2
33 pF
Hexadecimal
900
180
C0
60
30
18
0C
06
03
02
01
Figure
SC16C554B/554DB
13). Alternatively, an external clock can
XTAL1
1.8432 MHz
C1
22 pF
DLM
program value
(hex)
09
01
00
00
00
00
00
00
00
00
00
X1
XTAL2
002aaa870
1.5 kΩ
C2
47 pF
© NXP B.V. 2010. All rights reserved.
DLL
program value
(hex)
00
80
C0
60
30
18
0C
06
03
02
01
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