CDP1854 Intersil Corporation, CDP1854 Datasheet - Page 13

• Manufacturer Part Number: CDP1854
• Description: Programmable Universal Asynchronous Receiver/Transmitter (UART)
• Manufacturer: Intersil Corporation

Dynamic Electrical Specifications
NOTES:
Dynamic Electrical Specifications
NOTES:
CPU INTERFACE - READ TIMING - MODE 1
Minimum Pulse Width
Minimum Setup Time
Minimum Hold Time
Read to Data Access Time
Read to Data Valid Time
RESEL to Data Valid Time
Hold Time
1. Typical values for T
2. Maximum limits of minimum characteristics are the values above which all devices function.
1. Typical values for T
2. Maximum limits of minimum characteristics are the values above which all devices function.
CPU INTERFACE - WRITE TIMING - MODE 1
Minimum Pulse Width
Minimum Setup Time
Minimum Hold Time
TPB
RSEL to TPB
RSEL after TPB
Data after Read
TPB
RSEL to Write
Data to Write
RSEL after Write
Data after Write
PARAMETER
PARAMETER
A
A
= 25
= 25
o
o
C and nominal voltages.
C and nominal voltages.
t
t
RDDA
RSDV
t
t
t
t
RDH
RST
TRS
RDV
t
TT
T
(See Figure 5)
T
(See Figure 6)
A
A
= -40
= -40
V
(V)
10
10
10
10
10
10
10
DD
5
5
5
5
5
5
5
t
t
CDP1854A, CDP1854AC
RSW
t
WRS
t
t
DW
WD
TT
o
o
C to +85
C to +85
MIN
50
25
-
-
-
-
-
-
-
-
-
-
-
-
o
o
V
(V)
C, V
C, V
10
10
10
10
10
DD
5
5
5
5
5
5-54
DD
DD
CDP1854A
(NOTE 1)
TYP
5%, t
5%, t
100
200
100
200
100
150
150
50
50
25
50
25
75
75
(NOTE 1)
TYP
100
-30
-15
50
50
25
50
25
75
40
R
R
, t
, t
CDP1854A
F
F
(NOTE 2)
= 20ns, V
= 20ns, V
MAX
150
300
150
300
150
225
125
75
75
40
75
40
-
-
(NOTE 2)
LIMITS
MAX
150
125
75
75
40
75
40
60
0
0
IH
IH
= 0.7 V
= 0.7 V
LIMITS
MIN
50
-
-
-
-
-
-
-
-
-
-
-
-
-
(NOTE 1)
DD
DD
CDP1854AC
TYP
100
-30
, V
, V
50
50
75
(NOTE 1)
-
-
-
-
-
CDP1854AC
IL
IL
TYP
100
200
200
150
150
50
50
= 0.3 V
= 0.3 V
-
-
-
-
-
-
-
(NOTE 2)
DD
DD
MAX
(NOTE 2)
150
125
75
75
0
-
-
-
-
-
, C
, C
MAX
150
300
300
225
75
75
-
-
-
-
-
-
-
-
L
L
= 100pF,
= 100pF,
UNITS
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns