Datasheet DS28E18 (Maxim) - 4
| 制造商 | Maxim |
| 描述 | 1-Wire to I2C/SPI Bridge with Command Sequencer |
| 页数 / 页 | 70 / 4 — Electrical Characteristics (continued). PARAMETER. SYMBOL. CONDITIONS. … |
| 文件格式/大小 | PDF / 1.2 Mb |
| 文件语言 | 英语 |
Electrical Characteristics (continued). PARAMETER. SYMBOL. CONDITIONS. MIN. TYP. MAX. UNITS
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Electrical Characteristics (continued)
(Limits are 100% tested at TA = +25°C and TA = +85°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Specifications marked GBD are guaranteed by design and not production tested. Specifications to the minimum operating temperature are guaranteed by design and are not production tested. )
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
High-to-Low Switching 0.65 x V V Threshold TL (Note 3, Note 5, Note 6) VPUP 0.1 x Input Low Voltage VIL (Note 7) mV VPUP Low-to-High Switching 0.75 x V V Threshold TH (Note 3, Note 5, Note 8) VPUP Switching Hysteresis VHY (Note 3, Note 5,Note 9) 0.3 V Output Low Voltage VOL IOL = 4mA (Note 10) 0.4 V Standard speed 25 Standard speed, directly prior to RPUP = 1000Ω, 100 reset pulse Recovery Time tREC (Note 1, Note 11, μs Note 12) Overdrive speed 5 Overdrive speed, directly prior to 10 reset pulse Rising-Edge Hold-off Applies to standard speed only t 1 μs Time REH (Note 3, Note 13) Standard speed (Note 3, Note 14) 85 Time Slot Duration tSLOT μs Overdrive speed (Note 3, Note 14) 11
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Standard speed (Note 1) 480 640 Reset Low Time tRSTL μs Overdrive speed (Note 1) 48 80 Standard speed (Note 1, Note 15) 480 Reset High Time tRSTH μs Overdrive speed (Note 1, Note 15) 48 Presence-Detect Fall Standard speed (Note 3, Note 16) 1.25 t μs Time FPD Overdrive speed (Note 3, Note 16) 0.15 Presence-Detect Standard speed (Note 1, Note 17) 65 75 t μs Sample Time MSP Overdrive speed (Note 1, Note 17) 7 10
IO PIN: 1-Wire WRITE
Standard speed (Note 1, Note 18) 60 120 Write-Zero Low Time tW0L μs Overdrive speed (Note 1, Note 18) 6 16 Standard speed (Note 1, Note 18) 0.25 15 Write-One Low Time tW1L μs Overdrive speed (Note 1, Note 18) 0.25 2 19-100832 www.maximintegrated.com Maxim Integrated | 4 Document Outline General Description Applications Benefits and Features Simplified Application Block Diagram Absolute Maximum Ratings Package Information 8 TDFN-EP Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Pin Configuration DS28E18 Pin Description Functional Diagram Block Diagram Detailed Description 64-Bit ROM ID Power-Up ROM ID Serialization 1-Wire Bus System Hardware Configuration Transaction Sequence Initialization 1-Wire ROM Function Commands Search ROM [F0h] Read ROM [33h] Match ROM [55h] Skip ROM [CCh] Resume [A5h] Overdrive-Skip ROM [3Ch] Overdrive-Match ROM [69h] 1-Wire Signaling and Timing Read/Write Time Slots Master-to-Slave Slave-to-Master Improved Network Behavior Device Function Commands Command Start (66h) Write Sequencer Command (11h) Read Sequencer Command (22h) Run Sequencer Command (33h) Device Configuration and Status Commands Write Configuration Command (55h) Read Configuration Command (6Ah) Write GPIO Configuration (83h) Read GPIO Configuration (7Ch) Device Status Command (7Ah) Sequencer Commands I2C Sequencer Interface Commands I2C Start Command I2C Stop Command I2C Write Data Command I2C Read Data Command I2C Read Data with NACK End Command SPI Sequencer Commands SPI Write/Read Byte(s) Command SPI Write/Read Bit(s) Command SS_HIGH Command SS_LOW Command Sequencer Utility Commands GPIO_CTRL Write Command GPIO_CTRL Read Command GPIO_BUF Write Command GPIO_BUF Read Command Delay Command SENS_VDD On Command SENS_VDD Off Command I2C Overview I2C Definitions Bus Idle or Not Busy START Condition STOP Condition Repeated START Condition Data Valid SPI Overview SPI Timing SPI Timing Diagram Power-Up of GPIO/I2C Pins Timeout Typical Application Circuits DS28E18 Configured as an I2C Master Typical Application Circuits (continued) DS28E18 Configured as an SPI Master Ordering Information Revision History
Electrical Characteristics (continued)
(Limits are 100% tested at TA = +25°C and TA = +85°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Specifications marked GBD are guaranteed by design and not production tested. Specifications to the minimum operating temperature are guaranteed by design and are not production tested. )
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
High-to-Low Switching 0.65 x V V Threshold TL (Note 3, Note 5, Note 6) VPUP 0.1 x Input Low Voltage VIL (Note 7) mV VPUP Low-to-High Switching 0.75 x V V Threshold TH (Note 3, Note 5, Note 8) VPUP Switching Hysteresis VHY (Note 3, Note 5,Note 9) 0.3 V Output Low Voltage VOL IOL = 4mA (Note 10) 0.4 V Standard speed 25 Standard speed, directly prior to RPUP = 1000Ω, 100 reset pulse Recovery Time tREC (Note 1, Note 11, μs Note 12) Overdrive speed 5 Overdrive speed, directly prior to 10 reset pulse Rising-Edge Hold-off Applies to standard speed only t 1 μs Time REH (Note 3, Note 13) Standard speed (Note 3, Note 14) 85 Time Slot Duration tSLOT μs Overdrive speed (Note 3, Note 14) 11
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Standard speed (Note 1) 480 640 Reset Low Time tRSTL μs Overdrive speed (Note 1) 48 80 Standard speed (Note 1, Note 15) 480 Reset High Time tRSTH μs Overdrive speed (Note 1, Note 15) 48 Presence-Detect Fall Standard speed (Note 3, Note 16) 1.25 t μs Time FPD Overdrive speed (Note 3, Note 16) 0.15 Presence-Detect Standard speed (Note 1, Note 17) 65 75 t μs Sample Time MSP Overdrive speed (Note 1, Note 17) 7 10
IO PIN: 1-Wire WRITE
Standard speed (Note 1, Note 18) 60 120 Write-Zero Low Time tW0L μs Overdrive speed (Note 1, Note 18) 6 16 Standard speed (Note 1, Note 18) 0.25 15 Write-One Low Time tW1L μs Overdrive speed (Note 1, Note 18) 0.25 2 19-100832 www.maximintegrated.com Maxim Integrated | 4 Document Outline General Description Applications Benefits and Features Simplified Application Block Diagram Absolute Maximum Ratings Package Information 8 TDFN-EP Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Pin Configuration DS28E18 Pin Description Functional Diagram Block Diagram Detailed Description 64-Bit ROM ID Power-Up ROM ID Serialization 1-Wire Bus System Hardware Configuration Transaction Sequence Initialization 1-Wire ROM Function Commands Search ROM [F0h] Read ROM [33h] Match ROM [55h] Skip ROM [CCh] Resume [A5h] Overdrive-Skip ROM [3Ch] Overdrive-Match ROM [69h] 1-Wire Signaling and Timing Read/Write Time Slots Master-to-Slave Slave-to-Master Improved Network Behavior Device Function Commands Command Start (66h) Write Sequencer Command (11h) Read Sequencer Command (22h) Run Sequencer Command (33h) Device Configuration and Status Commands Write Configuration Command (55h) Read Configuration Command (6Ah) Write GPIO Configuration (83h) Read GPIO Configuration (7Ch) Device Status Command (7Ah) Sequencer Commands I2C Sequencer Interface Commands I2C Start Command I2C Stop Command I2C Write Data Command I2C Read Data Command I2C Read Data with NACK End Command SPI Sequencer Commands SPI Write/Read Byte(s) Command SPI Write/Read Bit(s) Command SS_HIGH Command SS_LOW Command Sequencer Utility Commands GPIO_CTRL Write Command GPIO_CTRL Read Command GPIO_BUF Write Command GPIO_BUF Read Command Delay Command SENS_VDD On Command SENS_VDD Off Command I2C Overview I2C Definitions Bus Idle or Not Busy START Condition STOP Condition Repeated START Condition Data Valid SPI Overview SPI Timing SPI Timing Diagram Power-Up of GPIO/I2C Pins Timeout Typical Application Circuits DS28E18 Configured as an I2C Master Typical Application Circuits (continued) DS28E18 Configured as an SPI Master Ordering Information Revision History