SCN68681E1A44 NXP Semiconductors, SCN68681E1A44 Datasheet - Page 7

• Manufacturer Part Number: SCN68681E1A44
• Manufacturer: NXP Semiconductors

Specifications of SCN68681E1A44

• 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): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Not Compliant

1. Parameters are valid over specified temp. range. See Ordering information table for applicable operating temp. and V
2. All voltage measurements are referenced to ground (GND). For testing, all inputs except X1/CLK swing between 0.4 V and 2.4 V with
3. Typical values are at +25 C, typical supply voltages, and typical processing parameters.
4. Test conditions for outputs: C
5. This specification will impose maximum 68000 CPU CLK to 6 MHz. Higher CPU CLK can be used if repeating bus reads are not performed.
6. This specification imposes a lower bound on CSN and IACKN LOW, guaranteeing that it will be LOW for at least 1 CLK period. This
7. This spec is made only to insure that DTACKN is asserted with respect to the rising edge of the X1/CLK pin as shown in the timing diagram,
8. Operation to 0 MHz is assured by design. Minimum test frequency is 2.0 MHz.
Philips Semiconductors
AC CHARACTERISTICS
NOTES:
2004 Mar 02
SYMBOL
SYMBOL
not to guarantee operation of the part. If set-up time is violated, DTACKN may be asserted as shown, or may be asserted 1 clock cycle later.
Reset Timing (See Figure 3)
Bus Timing (See Figures 4, 5, 6)
Port Timing (See Figure 7)
Interrupt Reset Timing (See Figure 8)
Clock Timing (See Figure 9)
Transmitter Timing (See Figure 10)
Receiver Timing (See Figure 11)
Dual asynchronous receiver/transmitter (DUART)
a transition time of 20 ns maximum. For X1/CLK this swing is between 0.4 V and 4.4 V. All time measurements are referenced at input
voltages of 0.8 V and 2.0 V as appropriate.
Consecutive write operations to the same command register require at least three edges of the X1 clock between writes.
requirement is made on CSN only to insure assertion of DTACKN and not to guarantee operation of the part.
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
f
t
f
t
f
t
f
t
t
t
t
RES
AS
AH
RWS
RWH
CSW
CSD
DD
DF
DS
DH
DAL
DCR
DCW
DAH
DAT
CSC
PS
PH
PD
IR
IR
CLK
CLK
CTC
CTC
RX
RX
TX
TX
TXD
TCS
RXS
RXH
8
5
6
RESETN pulse width
A1-A4 set-up time to CSN LOW
A1-A4 hold time from CSN LOW
RWN set-up time to CSN HIGH
RWN holdup time to CSN HIGH
CSN HIGH pulse width
CSN or IACKN HIGH from DTACKN LOW
Data valid from CSN or IACKN LOW
Data bus floating from CSN or IACKN HIGH
Data set-up time to CLK HIGH
Data hold time from CSN HIGH
DTACKN LOW from read data valid
DTACKN LOW (read cycle) from CLK HIGH
DTACKN LOW (write cycle) from CLK HIGH
DTACKN HIGH from CSN or IACKN HIGH
DTACKN HIGH impedance from CSN or IACKN HIGH
CSN or IACKN set-up time to clock HIGH
Port input setup time to CSN LOW
Port input hold time from CSN HIGH
Port output valid from CSN HIGH
INTRN or OP3-OP7 when used as interrupts negated from:
X1/CLK HIGH or LOW time
X1/CLK frequency
CTCLK HIGH or LOW time
CTCLK frequency
RxC HIGH or LOW time
RxC frequency (16X)
TxC HIGH or LOW time
TxC frequency (16X)
TxD output delay from TxC external clock input on IP pin
Output delay from TxC LOW at OP pin to TxD data output
RxD data set-up time before RxC HIGH at external clock input on IP pin
RxD data hold time after RxC HIGH at external clock input on IP pin
Read RHR (RxRDY/FFULL interrupt)
Write THR (TxRDY interrupt)
Reset command (delta break interrupt)
Stop C/T command (counter interrupt)
Read IPCR (input port change interrupt)
Write IMR (clear of interrupt mask bit)
(1X)
(1X)
L
T
amb
= 150 pF, except interrupt outputs. Test condition for interrupt outputs: C
= –40 C to +85 C, V
PARAMETER
PARAMETER
7
CC
= 5.0 V
7
10 %
1, 2, 3, 4
Min
200
100
100
100
100
220
220
240
200
90
20
20
90
10
0
0
–
–
0
–
–
–
–
0
0
–
–
–
–
–
–
–
0
0
0
0
0
0
–
–
L
= 50 pF, R
LIMITS
3.6864
Typ
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
3
L
= 2.7 k to V
CC
SCN68681
Max
175
100
125
125
100
125
400
300
300
300
300
300
300
350
150
4.0
4.0
2.0
1.0
2.0
1.0
supply range.
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Product data
CC
UNIT
UNIT
MHz
MHz
MHz
MHz
MHz
MHz
.
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns