ST16C1550/51
2.97V TO 5.5V UART WITH 16-BYTE FIFO
áç
REV. 4.2.0
AC ELECTRICAL CHARACTERISTICS
TA=0O TO 70OC (-40O TO +85OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 2.97V TO 5.5V
LIMITS
3.3V
LIMITS
5.0V
SYMBOL
PARAMETER
UNIT
CONDITIONS
MIN
MAX MIN
MAX
CLK
OSC
TAS
Clock Pulse Duration
63
21
ns
MHz
ns
Oscillator/External Clock Frequency
Address Setup Time
8
24
5
0
TAH
TCS
Address Hold Time
10
50
35
40
5
ns
ns
Chip Select Width
40
25
30
TRD
TDY
IOR# Strobe Width
ns
Read/Write Cycle Delay
Data Access Time
ns
TRDV
TDD
TWR
TDS
35
25
25
15
ns
Data Disable Time
0
40
20
5
0
25
15
5
ns
IOW# Strobe Width
ns
Data Setup Time
ns
TDH
TWDO
TMOD
TRSI
TSSI
TRRI
TSI
Data Hold Time
ns
Delay From IOW# To Output
Delay To Set Interrupt From MODEM Input
Delay To Reset Interrupt From IOR#
Delay From Stop To Set Interrupt
Delay From IOR# To Reset Interrupt
Delay From Stop To Interrupt
50
40
40
1
40
35
35
1
ns
100 pF load
100 pF load
100 pF load
ns
ns
Bclk
ns
45
45
24
1
40
40
24
1
100 pF load
ns
TINT
TSSR
TRR
TWT
TSRT
TRST
N
Delay From Initial INT Reset To Transmit Start
Delay From Stop To Reset RXRDY
8
8
Bclk
Bclk
ns
Delay From IOR# To Set RXRDY
45
45
8
40
40
8
Delay From IOW# To Reset TXRDY
Delay From Center of Start To Set TXRDY
ns
Bclk
ns
Reset Pulse Width
Baud Rate Divisor
Baud Clock
40
1
40
1
216-1
216-1
-
Bclk
16X of data rate
Hz
26
EXAR [ EXAR CORPORATION ]
