e
a
0 C to 70 C, V
e a
DD
g
5V 10%
3.0 AC Electrical Characteristics T
Symbol
§
§
Conditions
A
Parameter
Min
60
0
Max
Units
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
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Address Strobe Width
ADS
Address Hold Time
AH
RD, RD Delay from Address
Address Setup Time
(Note 1)
(Note 1)
30
60
30
0
AR
AS
WR, WR Delay from Address
Chip Select Hold Time
AW
CH
Chip Select Setup Time
RD, RD Delay from Chip Select
WR, WR Delay from Select
Data Hold Time
60
30
30
30
30
0
CS
(Note 1)
(Note 1)
CSR
CSW
DH
Data Setup Time
DS
@
RD, RD to Floating Data Delay
Master Reset Pulse Width
Address Hold Time from RD, RD
Read Cycle Delay
100 pF loading (Note 3)
(Note 1)
100
HZ
5000
20
125
20
125
MR
RA
RC
Chip Select Hold Time from RD, RD
RD, RD Strobe Width
(Note 1)
RCS
RD
@
RD, RD to Driver Enable/Disable
Delay from RD, RD to Data
Address Hold Time from WR, WR
Write Cycle Delay
100 pF loading (Note 3)
60
60
RDD
RVD
WA
WC
WCS
WR
XH
@
100 pF loading
(Note 1)
20
150
20
Chip Select Hold Time from WR, WR
WR, WR Strobe Width
(Note 1)
100
55
Duration of Clock High Pulse
Duration of Clock Low Pulse
External Clock (8, Max.)
External Clock (8, Max.)
55
XL
e
e
a
a
a
t
RD RC
RC
Read Cycle
Write Cycle
t
t
280
280
AR
a
t
WC
WC
t
t
AW
WR
Baud Generator
Baud Divisor
16
2
b
N
1
1
t
t
t
t
Baud Output Positive Edge Delay
Baud Output Negative Edge Delay
Baud Output Up Time
100 pF Load
100 pF Load
175
175
ns
ns
ns
ns
BHD
BLD
HW
LW
e
e
d
8, 2, 100 pF Load
f
f
75
X
d
8, 2, 100 pF Load
Baud Output Down Time
100
X
Receiver
t
Delay from Active Edge
of RD to Reset Interrupt
RAI
Ð
ns
ns
t
Delay from RD, RD
(RD RBR/or RD LSR)
to Reset Interrupt
100 pF Load
RINT
1000
t
Delay from RD RBR
to RXRDY Inactive
RXI
290
2000
1
ns
ns
t
t
Delay from RCLK to Sample Time
Delay from Stop to Set Interrupt
SCD
(Note 2)
RCLK
Cycles
SINT
Note 1: Applicable only when ADS is tied low.
e
Note 2: In the FIFO mode (FCR0 1) the trigger level interrupts, the receiver data available indication, the active RXRDY indication and the overrun error indication
will be delayed 3 RCLKs. Status indicators (PE, FE, BI) will be delayed 3 RCLKs after the first byte has been received. For subsequently received bytes these
indicators will be updated immediately after RDRBR goes inactive. Timeout interrupt is delayed 8 RCLKs.
Note 3: Charge and discharge time is determined by V , V
OL OH
and the external loading.
Note 4: These specifications are preliminary.
4