XR19L220_07 Datasheet, PDF (33/43 Pages) Exar Corporation – SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

REV. 1.0.1
XR19L220
SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
AC ELECTRICAL CHARACTERISTICS
Unless otherwise noted: TA=0^o to 70^oC (-40^o to +85^oC for industrial grade package), Vcc=3.0 - 5.5V, 50 pF
load where applicable
SYMBOL
PARAMETER
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
-
Crystal Frequency
20
24 MHz
OSC External Clock Frequency
33
50 MHz
CLK External Clock Low/High Time
15
10
ns
T_AS
T_AH
T_CS
T_RD
T_DY
T_RDV
T_DD
T_WR
T_DY
T_DS
T_DH
T_ADS
T_ADH
T_RWS
T_RDA
T_RDH
T_WDS
T_WDH
T_RWH
T_CSL
T_CSD
Address Setup Time (16 Mode)
Address Hold Time (16 Mode)
Chip Select Width (16 Mode)
IOR# Strobe Width (16 Mode)
Read Cycle Delay (16 Mode)
Data Access Time (16 Mode)
Data Disable Time (16 Mode)
IOW# Strobe Width (16 Mode)
Write Cycle Delay (16 Mode)
Data Setup Time (16 Mode)
Data Hold Time (16 Mode)
Address Setup (68 Mode)
Address Hold (68 Mode)
R/W# Setup to CS# (68 Mode)
Read Data Access (68 mode)
Read Data Disable Time (68 mode)
Write Data Setup (68 mode)
Write Data Hold (68 Mode)
CS# De-asserted to R/W# De-asserted (68 Mode)
CS# Width (68 Mode)
CS# Cycle Delay (68 Mode)
5
10
ns
0
0
ns
50
30
ns
50
30
ns
50
30
ns
50
25 ns
0
20
0
20 ns
50
30
ns
50
30
ns
15
12
ns
3
5
ns
5
10
ns
0
0
ns
10
10
ns
50
25
ns
20
20 _ns
15
12
ns
3
5
ns
10
10
ns
50
30
ns
50
30
ns
T_WDO
T_MOD
T_RSI
T_SSI
Delay From IOW# To Output
Delay To Set Interrupt From MODEM Input
Delay To Reset Interrupt From IOR#
Delay From Stop To Set Interrupt
75
50 ns
75
50 ns
75
50 ns
1
1 Bclk
33