SCN2681AC1N28 NXP Semiconductors, SCN2681AC1N28 Datasheet - Page 4

• Manufacturer Part Number: SCN2681AC1N28
• Manufacturer: NXP Semiconductors

Specifications of SCN2681AC1N28

• Number Of Channels: 2
• Transmitter And Receiver Fifo Counter: No
• Operating Supply Voltage (typ): 5V
• Package Type: PDIP
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 4.75V
• Mounting: Through Hole
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
2004 Mar 18
SYMBOL
SYMBOL
X1/CLK
X2
RxDA
RxDB
TxDA
TxDB
OP0
OP1
OP2
OP3
OP4
OP5
OP6
OP7
IP0
IP1
IP2
IP3
IP4
IP5
IP6
V
GND
NC
CC
Dual asynchronous receiver/transmitter (DUART)
DIP28
23
24
22
21
20
27
28
14
7
8
9
–
–
–
–
–
–
–
–
–
–
–
–
–
DIP40
Pin
32
33
31
10
30
11
29
12
28
13
27
14
26
15
36
39
38
37
40
20
7
4
2
–
1, 12, 23,
PLCC44
36
37
35
11
33
13
32
14
31
15
30
16
29
17
40
43
42
41
44
22
34
8
5
3
TYPE
TYPE
O
O
O
O
O
O
O
O
O
O
–
I
I
I
I
I
I
I
I
I
I
I
I
I
Crystal 1: Crystal connection or an external clock input. A crystal of a clock the
appropriate frequency (nominally 3.6864 MHz) must be supplied at all times. For
crystal connections see Figure 7, Clock Timing.
Crystal 2: Crystal connection. See Figure 7. If a crystal is not used it is best to keep
this pin not connected although it is permissible to ground it.
Channel A Receiver Serial Data Input: The least significant bit is received first.
“Mark” is HIGH, “space” is LOW.
Channel B Receive Serial Data Input: The least significant bit is received first.
“Mark” is HIGH, “space” is LOW.
Channel A Transmitter Serial Data Output: The least significant bit is transmitted
first. This output is held in the “mark” condition when the transmitter is disabled, idle
or when operating in local loopback mode. “Mark” is HIGH, “space” is LOW.
Channel B Transmitter Serial Data Output: The least significant bit is transmitted
first. This output is held in the “mark” condition when the transmitter is disabled, idle
or when operating in local loopback mode. “Mark” is HIGH, “space” is LOW.
Output 0: General purpose output or Channel A request to send (RTSAN,
active-LOW). Can be deactivated automatically on receive or transmit.
Output 1: General purpose output or Channel B request to send (RTSBN,
active-LOW). Can be deactivated automatically on receive or transmit.
Output 2: General purpose output or Channel A transmitter 1X or 16X clock output,
or Channel A receiver 1X clock output.
Output 3: General purpose output or open-drain, active-LOW counter/timer output
or Channel B transmitter 1X clock output, or Channel B receiver 1X clock output.
Output 4: General purpose output or Channel A open-drain, active-LOW,
RxRDYA/FFULLA output.
Output 5: General purpose output or Channel B open-drain, active-LOW,
RxRDYB/FFULLB output.
Output 6: General purpose output or Channel A open-drain, active-LOW, TxRDYA
output.
Output 7: General purpose output or Channel B open-drain, active-LOW, TxRDYB
output.
Input 0: General purpose input or Channel A clear to send active-LOW input
(CTSAN). Pin has an internal V
Input 1: General purpose input or Channel B clear to send active-LOW input
(CTSBN). Pin has an internal V
Input 2: General purpose input or counter/timer external clock input. Pin has an
internal V
Input 3: General purpose input or Channel A transmitter external clock input
(TxCA). When the external clock is used by the transmitter, the transmitted data is
clocked on the falling edge of the clock. Pin has an internal V
supplying 1 to 4 A of current.
Input 4: General purpose input or Channel A receiver external clock input (RxCA).
When the external clock is used by the receiver, the received data is sampled on the
rising edge of the clock. Pin has an internal V
of current.
Input 5: General purpose input or Channel B transmitter external clock input
(TxCB). When the external clock is used by the transmitter, the transmitted data is
clocked on the falling edge of the clock. Pin has an internal V
supplying 1 to 4 A of current.
Input 6: General purpose input or Channel B receiver external clock input (RxCB).
When the external clock is used by the receiver, the received data is sampled on the
rising edge of the clock. Pin has an internal V
of current.
Power Supply: +5 V supply input.
Ground
Not connected
CC
pull-up device supplying 1 to 4 A of current.
4
NAME AND FUNCTION
NAME AND FUNCTION
CC
CC
pull-up device supplying 1 to 4 A of current.
pull-up device supplying 1 to 4 A of current.
CC
CC
pull-up device supplying 1 to 4 A
pull-up device supplying 1 to 4 A
CC
CC
pull-up device
pull-up device
SCN2681
Product data