PC16552DV National Semiconductor, PC16552DV Datasheet - Page 5

• Manufacturer Part Number: PC16552DV
• Description: UART IC
• Manufacturer: National Semiconductor

Specifications of PC16552DV

• Transceiver Type: RS232
• Mounting Type: Surface Mount
• Peak Reflow Compatible (260 C): No
• Ic Function: UART IC
• Supply Voltage: 5V
• No. Of Transceivers: 2
• Data Rate Max: 128Kbps
• Leaded Process Compatible: No
• Supply Current: 30mA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TRANSMITTER
MODEM CONTROL
3 0 AC Electrical Characteristics
Note 1 This delay will be lengthened by 1 character time minus the last stop bit time if the transmitter interrupt delay circuit is active (See FIFO Interrupt Mode
Operation)
4 0 Timing Waveforms
Note 2 The 2 4V and 0 4V levels are the voltages that the inputs are driven to during AC testing
Note 3 The 2 0V and 0 8V levels are the voltages at which the timing tests are made
Symbol
t
t
t
t
t
t
t
t
t
t
HR
IR
IRS
SI
STI
SXA
WXI
MDO
RIM
SIM
External Clock Input (24 MHz Max)
Delay from WR (WR THR)
to Reset Interrupt
Delay from RD (RD IIR) to Reset
Interrupt (THRE)
Delay from Initial INTR Reset
to Transmit Start
Delay from Initial Write to Interrupt
Delay from Start to Interrupt (THRE)
Delay from Start to TXRDY Active
Delay from Write to TXRDY Inactive
Delay from WR (WR MCR)
to Output
Delay to Reset Interrupt from
RD (RD MSR)
Delay to Set Interrupt from MODEM Input
Parameter
All timings are referenced to valid 0 and valid 1
TL C 9426 – 2
BAUDOUT Timing
T
A
e
0 C to
5
Conditions
(Note 1)
(Note 1)
a
70 C V
DD
e a
Min
5V
16
8
g
AC Test Points
10% (Continued)
Max
40
40
24
24
25
40
78
40
8
8
TL C 9426 – 4
BAUDOUT
BAUDOUT
BAUDOUT
BAUDOUT
TL C 9426– 3
Cycles
Cycles
Cycles
Cycles
Units
ns
ns
ns
ns
ns
ns