GP2W0002YP Datasheet, PDF (7/14 Pages) Sharp Electrionic Components – Low Power Infrared Transceiver

Low Power Infrared Transceiver
GP2W0001YP/GP2W0002YP
ELECTRICAL DESIGN APPLICATION TIPS
Figure 11 shows a circuit application and passive
component values for a GP2W0001YP. The values
shown are only for reference. Contact your local Sharp
office concerning technical reference data for optical/
electrical characteristics.
Circuit Application and
External Passive Components
The circuit application and the external passive com-
ponents shown in Figure 11 enable the GP2W0001YP
to operate at both one-meter and 20 cm low power
option communication modes at V_CC = 3.0 V.
SHUTDOWN MODE
The ‘Shutdown’ pin is an active LOW terminal.
Shutdown mode only affects the power consumption
of the receiver circuits. The transmitter LED can still be
operated when SD is asserted. The two circuits are
independent and not internally connected. The trans-
mitter circuit does not consume current unless a drive
signal is applied.
Table 2. SD Pin Functions
INPUT
HIGH
LOW
OPEN
PERFORMANCE
Normal Mode
Shutdown Mode
Shutdown Mode
6 54
CX₁
R₁
321
R₂
R_L
CX₂
V_CC
RxD SD TxD
COMPONENTS RECOMMENDED VALUES
CX₁
47 µF, 6.3 V or as appropriate
CX₂
1,500 pF, 25 V
R₁
47 Ω, ±5%, 1/10 W
R₂
1 kΩ, ±5%, 1/10 W
2.2 Ω ±5%, 1/2 W,1 meter
R_L
33 Ω ±1%, 1/8 W, 20 cm
(low power)
NOTE: All recommended values are for V_CC = 3.0 V
GP2W0001YP-29
Figure 11. External Components
SD
RxD
V_IH
V_IL
(or OPEN)
OPERATABLE
40 ms
HIGH
LOW
GP2W0001YP-30
Figure 12. Receiver Activation
Technical Information
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