SC28L91A1B,551 NXP Semiconductors, SC28L91A1B,551 Datasheet - Page 36

• Manufacturer Part Number: SC28L91A1B,551
• Description: IC UART SINGLE W/FIFO 44-PQFP
• Manufacturer: NXP Semiconductors
• Series: IMPACTr
• Type: Single Channel UARTr

Specifications of SC28L91A1B,551

• Number Of Channels: 1, UART
• Package / Case: 44-MQFP, 44-PQFP
• Features: False-start Bit Detection
• Fifo's: 16 Byte
• Voltage - Supply: 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
• Data Rate: 0.2304 MBd
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Supply Current: 25 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V or 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-1187; 935267419551; SC28L91A1B-S

Philips Semiconductors
2004 Oct 21
3.3 V or 5.0 V Universal Asynchronous
Receiver/Transmitter (UART)
NOTES:
1.
2.
INTRN or OP3-OP7 when used as interrupt outputs.
The test for open-drain outputs is intended to guarantee switching of the output transistor. Measurement of this response is referenced from the midpoint of the switching
signal, V
test environment are pronounced and can greatly affect the resultant measurement.
C1 = C2
C1 and C2 should be chosen according to the crystal manufacturer’s specification.
C1 and C2 values will include any parasitic capacitance of the wiring and X1 X2 pins.
Gain at 3.6864MHz: 9 to 13 dB
Package capacitance approximately 4pF.
X1/CLK
CTCLK
M
RxC
TxC
, to a point 0.5V above V
24pF FOR C
L
= 20pF
PARASITIC CAPACITANCE
PARASITIC CAPACITANCE
OL
INTERRUPT
INTERRUPT
. This point represents noise margin that assures true switching has occurred. Beyond this level, the effects of external circuitry and
t
t
t
t
CLK
CTC
Rx
Tx
OUTPUT
OUTPUT
3pF
3pF
C2
C1
WRN
RDN
1
1
Figure 10. Interrupt Timing (80xxx mode)
3.6864MHz
Figure 11. Clock Timing
t
t
t
t
CLK
CTC
Rx
Tx
X1
X2
V
M
36
4pF
2pF
t
IR
V
*NOTE: X2 MUST BE LEFT OPEN.
CLK
M
NOTE:
RESISTOR REQUIRED
FOR TTL INPUT.
SC28L91
50k
to
100k
t
IR
V
OL
V
OL
+0.5V
+0.5V
V
OL
V
V
CC
OL
470
X2*
TO UART
CIRCUIT
X1
SD00704
SC28L91
Product data sheet
SD00136