LM12434CIWM NSC [National Semiconductor], LM12434CIWM Datasheet - Page 11

• Manufacturer Part Number: LM12434CIWM
• Description: Sign Data Acquisition System with Serial I/O and Self-Calibration
• Manufacturer: NSC [National Semiconductor]

2 0 Electrical Specifications
2 3 DIGITAL SWITCHING CHARACTERISTICS The following specifications apply to the LM12434 and LM12 L 438 for V
e
Boldface limits apply for T
2 3 2 8051 Interface Mode
(See Figure Below)
t
t
t
t
t
t
t
t
9
10
11
12
13
14
15
16
CLK is the main clock input to the device pin number 24 in PLCC package or pin number 2 in SO package
V
D
a e
Symbol
5V 3 3V
AGND
TXD (Serial Clock Period)
CS Set-Up Time to First
Clock Transition
Data in Valid Set-Up Time to
TXD Clock High
Data in Valid Hold Time
from TXD Clock High
Data Out Hold Time
from TXD Clock High
CS Hold Time from Last TXD
High in a Read or Write Cycle
(Excluding Burst Read Cycle)
CS Inactive to CS Active Again
SCLK Idle Time between the
End of the Command Byte
Transfer and the Start of the
Data Transfer in Read Cycles
A
e
e
DGND
Parameter
T
J
e
e
T
MIN
0V C
(Continued)
to T
L
(load capacitance) on output lines
MAX
all other limits for T
11
Conditions
A
e
(Note 10)
Typical
T
J
e
e
25 C (Notes 6 7 and 9) (Continued)
80 pF unless otherwise specified
125 250
70 120
(Note 11)
25 40
40 90
25 50
Limits
40
3
3
TL H 11879 – 21
CLK Cycle
CLK Cycle
ns (max)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
(Limit)
(min)
(min)
Units
A
a