SCN2681TC1A44 NXP Semiconductors, SCN2681TC1A44 Datasheet - Page 8

• Manufacturer Part Number: SCN2681TC1A44
• Manufacturer: NXP Semiconductors

Specifications of SCN2681TC1A44

• Transmitter And Receiver Fifo Counter: No
• Operating Supply Voltage (typ): 5V
• Package Type: PLCC
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Mounting: Surface Mount
• Pin Count: 44
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Not Compliant

1. For bus operations, CEN and RDN (also CEN and WRN) are ANDed internally. As a consequence, the signal asserted last initiates the cycle
2. If CEN is used as the ‘strobing’ input, the parameter defines the minimum HIGH times between one CEN and the next. The RDN signal must
3. Consecutive write operations to the same command register require at least three edges of the X1 clock between writes.
Philips Semiconductors
NOTES:
2004 Mar 22
Dual asynchronous receiver/transmitter (DUART)
and the signal negated first terminates the cycle.
be negated for t
RDN input even if the CEN is used as the strobing signal for bus operations.
t
t
t
t
t
t
t
t
t
t
t
SYMBOL
SYMBOL
AVEL
ELAX
RLRH
EHEL
RLDA
RLDV
RHDI
RHDF
WLWH
DVWH
WHDI
(WRITE)
(WRITE)
(READ)
(READ)
A0–A3
D0–D7
D0–D7
WRN
RDN
CEN
CEN
EHEL
t
AVEL
A0–A3 setup to RDN and CEN, or WRN and CEN LOW
RDN and CEN, or WRN and CEN LOW to A0–A3 invalid
RDN and CEN LOW to RDN or CEN HIGH
CEN HIGH to CEN LOW
CEN and RDN LOW to data outputs active
CEN and RDN LOW to data valid
CEN or RDN HIGH to data invalid
CEN or RDN HIGH to data outputs floating
WRN and CEN LOW to WRN or CEN HIGH
Data input valid to WRN or CEN HIGH
WRN or CEN HIGH to data invalid
FLOAT
to guarantee that any status register changes are valid. As a consequence, this minimum time must be met for the
t
RLDA
t
ELAX
t
RLDV
t
WLWH
INVALID
2, 3
t
RLRH
t
DVWH
PARAMETER
PARAMETER
VALID
Figure 4. Bus Timing
1
1
VALID
8
t
WHDI
t
t
EHEL
RHDI
t
RHDF
t
EHEL
Min
100
120
110
15
10
75
35
15
0
–
–
FLOAT
LIMITS
SCN2681T
Max
100
65
–
–
–
–
–
–
–
–
–
SD00100
Product data
UNIT
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns