Datasheet

© 2009 Microchip Technology Inc. DS21948E-page 5
MCP3905/06
FIGURE 1-1: Output Timings for Pulse Outputs and Negative Power Pin.
TIMING CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all parameters apply at AV
DD
= DV
DD
= 4.5V – 5.5V,
A
GND
, D
GND
= 0V, MCLK = 3.58 MHz; T
A
= -40°C to +85°C.
Parameter Sym Min Typ Max Units Comment
Frequency Output
F
OUT0
and F
OUT1
Pulse Width
(Logic-Low)
t
FW
— 275 — ms 984376 MCLK periods
(Note 1)
HF
OUT
Pulse Width t
HW
— 90 — ms 322160 MCLK periods
(Note 2)
F
OUT0
and F
OUT1
Pulse Period t
FP
Refer to Equation 4-1 s
HF
OUT
Pulse Period t
HP
Refer to Equation 4-2 s
F
OUT0
to F
OUT1
Falling-Edge Time t
FS2
— 0.5 t
FP
—
F
OUT0
to F
OUT1
Min Separation t
FS
— 4/MCLK —
F
OUT0
and F
OUT1
Output High Voltage V
OH
4.5 —— VI
OH
= 10 mA, DV
DD
= 5.0V
F
OUT0
and F
OUT1
Output Low Voltage V
OL
——0.5 V I
OL
= 10 mA, DV
DD
= 5.0V
HF
OUT
Output High Voltage V
OH
4.0 —— VI
OH
= 5 mA, DV
DD
= 5.0V
HF
OUT
Output Low Voltage V
OL
——0.5 V I
OL
= 5 mA, DV
DD
= 5.0V
High-Level Input Voltage
(All Digital Input Pins)
V
IH
2.4 —— VDV
DD
= 5.0V
Low-Level Input Voltage
(All Digital Input Pins)
V
IL
——0.85 V DV
DD
= 5.0V
Input Leakage Current ——±3 µA V
IN
= 0, V
IN
= DV
DD
Pin Capacitance ——10 pF Note 3
Note 1: If output pulse period (t
FP
) falls below 984376*2 MCLK periods, then t
FW
= 1/2 t
FP
.
2: If output pulse period (t
HP
) falls below 322160*2 MCLK periods, then t
HW
= 1/2 t
HP
.
3: Specified by characterization, not production tested.
F
OUT0
t
FP
F
OUT1
HF
OUT
t
FW
t
HP
t
HW
t
FS
t
FS2
NEG