參數(shù)資料
型號(hào): LTC2923
廠商: Linear Technology Corporation
英文描述: Octal Bus Transceiver With 3-State Outputs 20-TSSOP -40 to 85
中文描述: 精密四電源監(jiān)視器6引腳SOT - 23
文件頁數(shù): 6/16頁
文件大?。?/td> 187K
代理商: LTC2923
6
LTC2903-1
29031f
PIU
V1 (Pin 1):
Voltage Input 1 (5V, 3.3V). Internal V
CC
is
generated from the greater voltage on the V1, V2 inputs.
Bypass this pin to ground with a 0.1
μ
F (or greater)
capacitor.
GND (Pin 2):
Ground.
V2 (Pin 3):
Voltage Input 2 (3.3V, 2.5V). Internal V
CC
is
generated from the greater voltage on the V1, V2 inputs.
Bypass this pin to ground with a 0.1
μ
F (or greater)
capacitor.
V3 (Pin 4):
Voltage Input 3 (2.5V, 1.8V). This input assists
the RST pull-down circuitry below 1V.
V4 (Pin 5):
Voltage Input 4 (ADJ, 1.8V, –5.2V). See Table
1 for recommended ADJ resistor values.
RST (Pin 6):
Reset Logic Output. Pulls low when any volt-
age input is below reset threshold and held low for 200ms
after all voltage inputs exceed threshold. The pin contains
a weak pull-up to V2. Use an external pull-up for faster rise
times or output voltages greater than V2.
TIW
W
V
RTX
t
UV
t
RST
1.5V
2903 TD
V
X
RST
TYPICAL PERFOR U
RST Pull-Up Current vs V2
RST Pull-Up Current vs External
Pull-Down Voltage on RST
V2 (V)
0
I
R
μ
A
–50
–70
–90
4
28031 G18
–30
–10
–40
–60
–80
–20
0
1
0.5
2
1.5
3
3.5
4.5
2.5
5
V
RT25
V
RT33
V1, V3, V4 ABOVE THRESHOLD
V
RST
(V)
0
I
R
μ
A
–35
1.5
29031 G19
–20
–10
0.5
1
2
–5
0
–40
–30
–25
–15
2.5
3
3.5
LTC2903B, C
LTC2903A
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