ST16C2552IJ44-F Exar Corporation, ST16C2552IJ44-F Datasheet - Page 9

• Manufacturer Part Number: ST16C2552IJ44-F
• Description: IC UART FIFO 16B DUAL 44PLCC
• Manufacturer: Exar Corporation
• Type: RS- 232 or RS- 485r

Specifications of ST16C2552IJ44-F

• Number Of Channels: 2, DUART
• Package / Case: 44-LCC (J-Lead)
• Features: *
• Fifo's: 16 Byte
• Protocol: RS232, RS485
• Voltage - Supply: 3.3 V ~ 5 V
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Data Rate: 4 Mbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.97 V
• Supply Current: 3 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V or 5 V
• No. Of Channels: 2
• Supply Voltage Range: 2.97V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: PLCC
• No. Of Pins: 44
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 1016-1258-5

REV. 4.2.2
The INTA and INTB interrupt outputs change according to the operating mode and enahnced features setup.
Tables
through 21.
The 2552 includes an on-chip oscillator (XTAL1 and XTAL2) to produce a clock for both UART sections in the
device. The CPU data bus does not require this clock for bus operation. The crystal oscillator provides a
system clock to the Baud Rate Generators (BRG) section found in each of the UART. XTAL1 is the input to the
oscillator or external clock buffer input with XTAL2 pin being the output.
RATE GENERATOR” ON PAGE 10.
F
The on-chip oscillator is designed to use an industry standard microprocessor crystal (parallel resonant,
fundamental frequency with 10-22 pF capacitance load, ESR of 20-120 ohms and 100ppm frequency
tolerance) connected externally between the XTAL1 and XTAL2 pins (see
1 MΩ resistor across it. Alternatively, an external clock can be connected to the XTAL1 pin to clock the internal
baud rate generator for standard or custom rates. Typical oscillator connections are shown in
further reading on oscillator circuit please see application note DAN108 on EXAR’s web site.
2.7
2.8
IGURE
INTA/B Pin
INTA/B Pin
3 and 4
4. T
INTA and INTB Ouputs
Crystal Oscillator or Ext. Clock Input
YPICAL OSCILLATOR CONNECTIONS
0 = a byte in THR
1 = THR empty
0 = no data
1 = 1 byte
summarize the operating behavior for the transmitter and receiver. Also see Figures
(FIFO D
(FIFO D
FCR B
FCR B
T
ABLE
T
IT
ISABLED
IT
ISABLED
ABLE
-0 = 0
-0 = 0
3: INTA
4: INTA
)
)
AND
AND
0 = FIFO below trigger level
1 = FIFO above trigger level
22-47 pF
XTAL1
INTB P
C1
0 = at least 1 byte in FIFO
1 = FIFO empty
INTB P
500 ΚΩ − 1 ΜΩ
INS
R2
22-47 pF
XTAL2
IN
9
C2
O
Y1
O
PERATION FOR
2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO
PERATION
1.8432 MHz
(Optional)
0-120 Ω
24 MHz
R1
to
F
(FIFO E
(FIFO E
FCR B
OR
FCR B
T
RANSMITTER
R
Figure
ECEIVER
IT
IT
NABLED
NABLED
SEE”PROGRAMMABLE BAUD
-0 = 1
-0 = 1
2), with an external 500kΩ to
)
)
ST16C2552
Figure
4. For
16