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參數資料
| 型號： | TMS3471C-X |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數： | 19/21頁 |
| 文件大小： | 347K |
| 代理商： | TMS3471C-X |
TMS3471C
2/3-INCH NTSC TIMER
SOCS028B – AUGUST 1991
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, VCC = 5 V
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
S1
CL = 20 pF
10
S2,3
CL = 40 pF
10
ABIN, GT, PD, PI, PS, T
CL =20 pF
30
GT1, GT2, GT3, SH1
CL = 20 pF
10
tr
Rise time
SH2,3
CL = 40 pF
10
ns
BCP1, BCP2
CL = 50 pF
100
SC, SC(90)
CL = 15 pF
30
CLK2M
CL =50 pF
50
All other outputs
CL = 50 pF
200
S1
CL = 20 pF
8
S2,3
CL = 40 pF
8
ABIN, GT, PD, PI, PS, T
CL =20 pF
30
GT1, GT2, GT3, SH1
CL = 20 pF
8
tf
Fall time
SH2,3
CL = 40 pF
8
ns
BCP1, BCP2
CL = 50 pF
100
SC, SC(90)
CL = 15 pF
30
CLK2M
CL =50 pF
50
All other outputs
CL = 50 pF
100
S1 rising edge to S2,3 rising edge
±5
S1 falling edge to SH1 falling edge
–3
–8
–13
S1 rising edge to GT1 falling edge
–3
–8
–13
t k( )
Skew time
SH2,3 rising edge to GT1 rising edge
±5
ns
tsk(o)
Skew time
S2,3 falling edge to SH2,3 falling edge
–3
–8
–13
ns
S2,3 falling edge to GT2 rising edge
–3
–8
–13
SH2,3 falling edge to GT2 rising edge
±5
SH2,3 rising edge to GT3 falling edge
±5
tw –tc /2
Pulse duration compared to
pulse duration at 50% duty
cycle
S1 or S2, 3
±5
ns
The S1 and S2,3 outputs ideally exhibit a 50% duty cycle. This parameter indicates how much the duty cycle may shift while a constant cycle
time is maintained. For example, for a 210-ns cycle time, tw(H) = 110 ns and tw(L) = 100 ns are possible.
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