W40S11-23G Cypress Semiconductor Corp, W40S11-23G Datasheet - Page 4

• Manufacturer Part Number: W40S11-23G
• Manufacturer: Cypress Semiconductor Corp

Specifications of W40S11-23G

• Number Of Outputs: 13
• Operating Supply Voltage (max): 3.47V
• Operating Temp Range: 0C to 70C
• Operating Supply Voltage (min): 3.14V
• Mounting: Surface Mount
• Pin Count: 28
• Operating Supply Voltage (typ): 3.3V
• Package Type: SOIC
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Not Compliant

How To Use the Serial Data Interface
Electrical Requirements
Figure 1 illustrates electrical characteristics for the serial inter-
face bus used with the W40S11-23. Devices send data over
the bus with an open drain logic output that can (a) pull the bus
line LOW, or (b) let the bus default to logic 1. The pull-up resis-
tor on the bus (both clock and data lines) establish a default
SERIAL BUS DATA LINE
SERIAL BUS CLOCK LINE
CLOCK OUT
CLOCK IN
(SERIAL BUS MASTER TRANSMITTER)
CHIP SET
N
SDCLK
DATA OUT
Figure 1. Serial Interface Bus Electrical Characteristics
DATA IN
N
SDATA
VDD
4
~ 2k
logic 1. All bus devices generally have logic inputs to receive
data.
Although the W40S11-23 is a receive-only device (no data
write-back capability), it does transmit an “acknowledge” data
pulse after each byte is received. Thus, the SDATA line can
both transmit and receive data.
The pull-up resistor should be sized to meet the rise and fall
times specified in AC parameters, taking into consideration to-
tal bus line capacitance.
CLOCK IN
(SERIAL BUS SLAVE RECEIVER)
VDD
CLOCK DEVICE
~ 2k
SCLOCK
DATA OUT
DATA IN
W40S11-23
N
SDATA
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