82C237
o
o
AC Electrical Specifications
V
= +5.0V ±10%, GND = 0V, T = 0 C to +70 C (C82C237),
CC A
o
o
T = -40 C to +85 C (I82C237),
T = -55 C to +125 C (M82C237) (Continued)
A
o
o
A
82C237
82C237-12
SYMBOL
PARAMETER
MIN
MAX
MIN
MAX
UNITS
ns
(35)TWRRD
(36)TRLRH
(37)TSHSL
(38)TWLWHA
(39)TWLWH
(40)TRLRHC
(56)TAVRL
(57)TAVWL
(58)TRHAL
(59)TRHSH
(60)TWHSH
(61)TDVRL
(62)TDVWL
(63)TRHDI
(64)TAZRL
(65)TOEV
READ HIGH Delay from WRITE HIGH
READ Pulse Width, Normal Timing
ADSTB Pulse Width
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5
2TCY-55
TCY-35
2TCY-80
TCY-80
TCY-55
17
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2TCY-60
TCY-50
2TCY-85
TCY-85
TCY-60
17
ns
ns
Extended WRITE Pulse Width
WRITE Pulse Width
ns
ns
READ Pulse Width, Compressed
ADR Valid to READ LOW
ns
ns
ADR Valid to WRITE LOW
7
7
ns
READ HIGH to AEN LOW
15
15
ns
READ HIGH to ADSTB HIGH
WRITE HIGH to ADSTB HIGH
DACK Valid to READ LOW
13
13
ns
15
15
ns
25
25
ns
DACK Valid to WRITE LOW
READ HIGH to DACK Inactive
ADR Float to READ LOW
25
25
ns
12
12
ns
-2.5
-2.5
ns
Output Enable Valid Before WRITE HIGH
Output Enable Hold Time from WRITE HIGH
TCY+20
TCY-50
TCY+20
TCY-50
ns
(66)TOEH
ns
PERIPHERAL (SLAVE) MODE
(41)TAR
ADR Valid or CS LOW to READ LOW
10
0
-
0
0
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
(42)TAWL
(43)TCWL
(44)TDW
(45)TRA
ADR Valid to WRITE LOW Setup Time
CS LOW to WRITE LOW Setup Time
Data Valid to WRITE HIGH Setup Time
ADR or CS Hold from READ HIGH
Data Access from READ
-
0
-
0
-
100
0
-
60
0
-
-
-
(46)TRDE
(47)TRDF
(48)TRSTD
(49)TRSTS
(50)TRSTW
(51)TRW
(52)TWA
-
120
-
80
55
-
DB Float Delay from READ HIGH
Power Supply HIGH to RESET LOW Setup Time
RESET to First IOR or IOW
5
85
-
5
500
2TCY
300
155
0
500
2TCY
300
85
0
-
-
RESET Pulse Width
-
-
READ Pulse Width
-
-
ADR from WRITE HIGH Hold Time
CS HIGH from WRITE HIGH Hold Time
Data from WRITE HIGH Hold Time
WRITE Pulse Width
-
-
(53)TWC
(54)TWD
(55)TWWS
0
-
0
-
10
100
-
10
45
-
-
-
4-167
INTERSIL [ Intersil ]
