24lc41 Microchip Technology Inc., 24lc41 Datasheet
24lc41
Available stocks
Related parts for 24lc41
24lc41 Summary of contents
Page 1
... The 4K-bit microcontroller port is completely independent of the DDC port, therefore, it can be accessed continuously by a microcontroller without interrupting DDC transmission activity. The 24LC41 is available in a standard 8-pin PDIP package in both commercial and industrial temperature ranges. 2004 Microchip Technology Inc. Obsolete Device ...
Page 2
... ELECTRICAL CHARACTERISTICS 1.1 Absolute Maximum Ratings V .............................................................................................................................................................................7.0V CC All inputs and outputs w.r.t. V ......................................................................................................... -0. Storage temperature ...............................................................................................................................-65°C to +150°C Ambient temperature with power applied ................................................................................................-65°C to +125°C ESD protection on all pins † NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...
Page 3
... Schmitt Trigger inputs which provide improved specification for standard operation. I 24LC41 Units Remarks kHz (Note 1) ns (Note 1) ns After this period the first clock pulse is generated ns Only relevant for repeated ...
Page 4
... FUNCTIONAL DESCRIPTION 2.1 DDC Monitor Port The DDC Monitor Port operates in two modes, the Transmit-only mode and the Bidirectional mode. There is a separate 2-wire protocol to support each mode, each having a separate clock input and sharing a common data line (DSDA). The device enters the Transmit-only mode upon power-up ...
Page 5
... Start and Stop conditions, while the Microcontroller Access Port works as slave. Both master and slave can operate as transmitter or receiver, but the master device determines which mode is activated. Bidirectional Mode T VHZ 24LC41 DS21140F-page 5 ...
Page 6
... BIDIRECTIONAL BUS CHARACTERISTICS Characteristics for the bidirectional bus are identical for both the DDC Monitor Port (in Bidirectional mode) and the Microcontroller Access Port The following bus protocol has been defined: • Data transfer may be initiated only when the bus is not busy. ...
Page 7
... Microchip Technology Inc. (D) Address or Data Acknowledge Allowed Valid to Change V HYS : STA T HIGH DAT SU DAT STA T AA Start READ/WRITE R/W SLAVE ADDRESS 24LC41 (D) ( Stop Condition STO Stop STO T BUF A DS21140F-page 7 ) ...
Page 8
... WRITE OPERATION Write operations are identical for the DDC Monitor Port (when in Bidirectional mode) and the Microcontroller Access Port, with the exception of the VCLK/DWP and MWP pins noted in the next sections. Data can be written using either a Byte Write or Page Write command ...
Page 9
... Master R Byte T S SDA LINE Bus Activity VCLK/DWP 2004 Microchip Technology Inc. Word Address Word Data n Address 24LC41 S T Data Data Data DS21140F-page 9 ...
Page 10
... ACKNOWLEDGE POLLING Acknowledge polling can be done for both the DDC Monitor Port (when in Bidirectional mode) and the Microcontroller Access Port. Since the port will not acknowledge during a write cycle, this can be used to determine when the cycle is complete (this feature can be used to maximize but throughput) ...
Page 11
... V below 1.5 volts at nominal conditions. The DSCL, MSCL, DSDA and MSDA inputs have Schmitt Trigger and filter circuits which suppress noise spikes to assure proper device operation even on a noisy bus. Control Byte Data 24LC41 ...
Page 12
... FIGURE 7-2: RANDOM READ S T Bus Activity Control A Byte Master MSDA Line Bus Activity FIGURE 7-3: SEQUENTIAL READ Control Bus Activity Data n Byte Master DSDA or MSDA Line A C Bus Activity K DS21140F-page Word Control A Address Byte ...
Page 13
... This pin must be connected to either V If tied to Vss, normal memory operation is enabled for (read/write the entire memory). If tied Write operations are inhibited. The entire CC memory will be write-protected. Read operations are not affected. 24LC41 (typical 10K for 100 kHz DS21140F-page 13 ...
Page 14
... APPENDIX A: REVISION HISTORY Revision E Corrections to Section 1.0, Electrical Characteristics. DS21140F-page 14 2004 Microchip Technology Inc. ...
Page 15
... PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office PART NO. X /XX Device Temperature Package Range Device 24LC41 Dual Mode, Dual Port I Temperature Range Blank = + - +85 C Package P = PDIP Sales and Support Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds ...
Page 16
... NOTES: DS21140F-page 16 2004 Microchip Technology Inc. ...
Page 17
... Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. 2004 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC ...
Page 18
... Via Salvatore Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Waegenburghtplein 4 NL-5152 JR, Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 07/12/04 2004 Microchip Technology Inc. ...