XRT16C854 Datasheet, PDF (42/54 Pages) Exar Corporation – 2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO

XR16C854/854D
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
xr
REV. 3.0.1
AC ELECTRICAL CHARACTERISTICS
TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 2.97 TO 5.5V
SYMBOL
PARAMETER
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
CONDITIONS
CLK Clock Pulse Duration
20
15
ns
OSC Oscillator Frequency
8
24 MHz
OSC External Clock Frequency
24
32 MHz
TAS Address Setup Time (16 Mode)
10
5
ns
TAH Address Hold Time (16 Mode)
10
5
ns
TCS Chip Select Width (16 Mode)
66
50
ns
TRD IOR# Strobe Width (16 Mode)
35
25
ns
TDY Read Cycle Delay (16 Mode)
40
30
ns
TRDV Data Access Time (16 Mode)
35
25 ns
TDD Data Disable Time (16 Mode)
0
25
0
15 ns
TWR IOW# Strobe Width (16 Mode)
35
25
ns
TDY Write Cycle Delay (16 Mode)
40
30
ns
TDS Data Setup Time (16 Mode)
10
5
ns
TDH Data Hold Time (16 Mode)
10
5
ns
T_ADS
T_ADH
TRWS
Address Setup (68 Mode)
Address Hold (68 Mode)
R/W# Setup to CS# (68 Mode)
10
10
ns
15
15
ns
10
5
ns
T_RDA
TRDH
Read Data Access (68 mode)
Read Data Hold (68 mode)
15
15
ns
15
15
ns
T_WDS Write Data Setup (68 mode)
20
15
ns
T_WDH Write Data Hold (68 Mode)
10
TRWH CS# De-asserted to R/W# De-asserted (68 Mode) 10
10
ns
10
ns
TCSL CS# Strobe Width (68 Mode)
40
40
ns
TCSD CS# Cycle Delay (68 Mode)
70
70
ns
TWDO Delay From IOW# To Output
50
40 ns 100 pF load
TMOD Delay To Set Interrupt From MODEM Input
40
35 ns 100 pF load
TRSI Delay To Reset Interrupt From IOR#
40
35 ns 100 pF load
TSSI Delay From Stop To Set Interrupt
1
1 Bclk
TRRI Delay From IOR# To Reset Interrupt
40
40 ns 100 pF load
42