LS7237 Просмотр технического описания (PDF) - LSI Corporation
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LS7237 Datasheet PDF : 4 Pages
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ABSOLUTE MAXIMUM RATINGS:
PARAMETER
SYMBOL
DC Supply Voltage
VSS
Any Input Voltage
VIN
Operating Temperature
TA
Storage Temperature
TSTG
VALUE
+20
VSS -20 to VSS +0.5
0 to +80
-65 to +150
UNIT
V
V
˚C
˚C
DC ELECTRICAL CHARACTERISTICS:
(TA = 25˚C, all voltages referenced to VDD)
PARAMETER
Supply Voltage
Supply Current
Input Voltages:
MODE LO
MODE HI
SYNC LO
SYNC HI
SENS LO
SENS HI
EXT LO
EXT HI
SYMBOL
VSS
ISS
VIZL
VIZH
VIRL
VIRH
VIOL
VIOH
VIVL
VIVH
MIN
+12
–
TYPE
–
1.0
MAX
+18
1.4
0
–
VSS-1.5 –
0
–
VSS-5.5 –
0
–
VSS-2 –
0
–
VSS-2 –
VSS-9
VSS
VSS-9.5
VSS
VSS-8
VSS
VSS-8
VSS
UNIT
V
mA
V
V
V
V
V
V
V
V
CONDITION
-
VSS = +15V,
output off
-
-
-
-
-
-
-
-
Input Current:
SYNC, SENS, EXT HI
IIH
SYNC, SENS, EXT LO
IL
–
–
110
–
–
100
µA
With Series 1.5MΩ
Resistor to
115VAC Line
nA
-
TRIG HI Voltage
TRIG LO Voltage
TRIG Sink Current
VOH
VOL
IOS
–
VSS
–
–
VSS-8
–
25
–
–
V
-
V
VSS = +15V
mA
VSS = +15V
VOL = VSS-4V
TIMING CHARACTERISTICS (See Figures 2 and 3):
All timings are based on fs = 60Hz, unless otherwise specified. 50Hz timings are 1.2 times 60Hz timings.
PARAMETER
SYNC Frequency
SENS/EXT Duration
SYMBOL
MIN
fs
40
TS1
50
TYPE
-
-
MAX
70
Infinite
UNIT
Hz
ms
TRIG Pulse Width
TW
-
33
-
µs
SYNC 4
BUF
CAP 3
MODE 2
BUF
PHASE
LOCK
LOOP
EXT 6
BUF
CONTROL
LOGIC
SENS 5
BUF
VSS 1
VDD 7
7237-041395-3
(+V)
(-V)
Ø
MEMORY
Ø
POINTER
DIGITAL
COMPARATOR
FIGURE 4
LS7237 BLOCK DIAGRAM
OUTPUT
DRIVER
8 TRIG
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