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realtek confidential files the document authorized to null 2010-09-06 11:05:54 RTL8188CUS-GR single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) datasheet (confidential: development partners only) rev. 1.0 28 may 2010 track id: jatr-2265-11 realtek semiconductor corp. no. 2, innovation road ii, hsinchu science park, hsinchu 300, taiwan tel.: +886-3-578-0211. fax: +886-3-577-6047 www.realtek.com free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) ii track id: jatr-2265-11 rev. 1. 0 copyright ?2010 realtek semiconductor corp. all rights reserve d. no part of this document may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means without the written permission of realtek semiconductor corp. disclaimer realtek provides this document ?as is?, without wa rranty of any kind. realtek may make improvements and/or changes in this document or in the product de scribed in this document at any time. this document could include technical inaccuracies or typographical errors. trademarks realtek is a trademark of realtek semiconductor cor poration. other names mentioned in this document are trademarks/registered trademarks of their respective owners. using this document this document is intended for the software engi neer?s reference and provides detailed programming information. though every effort has been made to ensure that this document is current and accurate, more information may have become available subsequent to the production of this guide. revision history revision release date summary 1.0 2010/05/28 first release. free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) iii track id: jatr-2265-11 rev. 1. 0 table of contents 1. general des cription ............................................................................................................ ...................................1 2. features ....................................................................................................................... ...................................................2 3. application diagram ............................................................................................................ ...................................4 3.1. s ingle -b and 11 n (1 x 1) s olution (11 n 1 x 1 mac/bb/rf +pa) .................................................................................4 4. pin assignments................................................................................................................ ...........................................5 4.1. p ackage i dentification ............................................................................................................................... ...............5 5. pin descriptions ............................................................................................................... ...........................................6 5.1. usb t ransceiver i nterface ............................................................................................................................... .......6 5.2. p ower p ins ............................................................................................................................... .....................................6 5.3. rf i nterface ............................................................................................................................... .................................6 5.4. led i nterface ............................................................................................................................... ...............................7 5.5. c lock and o ther p ins ............................................................................................................................... ..................7 6. electrical and therma l characteristics......................................................................................... ......9 6.1. t emperature l imit r atings ............................................................................................................................... ........9 6.2. dc c haracteristics ............................................................................................................................... .....................9 7. mechanical dimensions .......................................................................................................... .............................10 7.1. m echanical d imensions n otes ............................................................................................................................... 10 8. ordering information ........................................................................................................... ..............................11 free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) iv track id: jatr-2265-11 rev. 1. 0 list of tables t able 1. usb t ransceiver i nterface ............................................................................................................................... ...6 t able 2. p ower p ins ............................................................................................................................... .................................6 t able 3. rf i nterface ............................................................................................................................... .............................6 t able 4. led i nterface ............................................................................................................................... ...........................7 t able 5. c lock and o ther p ins ............................................................................................................................... ..............7 t able 6. t emperature l imit r atings ............................................................................................................................... ....9 t able 7. dc c haracteristics ............................................................................................................................... .................9 t able 8. o rdering i nformation ............................................................................................................................... ...........11 list of figures f igure 1. s ingle -b and 11 n (1 x 1) s olution (11 n 1 x 1 mac/bb/rf +pa) .........................................................................4 f igure 2. p in a ssignments ............................................................................................................................... ....................5 free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 1 track id: jatr-2265-11 rev. 1. 0 1. general description the realtek RTL8188CUS-GR is a highly integrated single-chip qfn-46 pin wireless lan (wlan) usb2.0 network interface controller compatible w ith the 802.11n specification. it combines a mac, a 1t1r capable baseband, and rf in a single chip. the rtl8188cus provides a complete solution for a high throughput performance wireless client. the rtl8188cus baseband implements orthogonal fr equency division multiplexing (ofdm) with 1 transmit and 1 receive path and is compatible w ith the ieee 802.11n specification. features include one spatial stream transmission, short guard interval (gi) of 400ns, spatial spreading, and transmission over 20mhz and 40mhz bandwidth. for legacy compatibility, direct sequence spread spectrum (dsss), complementary code keying (cck) and ofdm baseband processing are included to support all ieee 802.11b and 802.11g data rates. differential phase shift keying modulation schemes, dbpsk and dqpsk with data scrambling capability, are available, and cck provides support for legacy data rates, with long or short preamble. the high-speed fft/ifft paths, combined with bpsk, qpsk, 16qam, and 64qam modulation of the individual subcarriers and rate compatible punctured convolutiona l coding with coding rate of 1/2, 2/3, 3/4, and 5/6, provide higher data rates of 54mbps and 150mbps for ieee 802.11g and 802.11n ofdm respectively. the rtl8188cus builds in an enhanced signal detect or, an adaptive frequency domain equalizer, and a soft-decision viterbi decoder to alleviate severe multi-pa th effects and mutual interference in the reception of multiple streams. robust interference detecti on and suppression are provi ded to protect against bluetooth, cordless phone, and microwave oven interference. efficient iq-imbalance, dc offset, phase noise, fre quency offset, and timing offset compensations are provided for the radio frequency front -end. selectable digital transmit and receive fir filters are provided to meet transmit spectrum mask requirements and to reject adjacent channel interference, respectively. the rtl8188cus supports fast receiver automatic gain control (agc) with synchronous and asynchronous control loops among antennas, antenna diversity functions, and adaptive transmit power control function to obtain the better performance in the analog portions of the transceiver. the rtl8188cus mac supports 802.11e for multimedia applications, 802.11i for security, and 802.11n for enhanced mac protocol efficiency. using packet aggregation techniques su ch as a-mpdu with ba and a-msdu, protocol efficiency is significantly improved. power saving mechanisms such as legacy power save, and u-apsd, and apsd, reduce the power wasted during idle time, and compensates for the extra power required to transmit ofdm. the rtl8188cus provides simple legacy and 20mhz/40mhz co-existence mechanisms to ensure backward and network compatibility. free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 2 track id: jatr-2265-11 rev. 1. 0 2. features general ? 46-pin qfn ? cmos mac, baseband phy, and rf in a single chip for ieee 802.11b/g/n compatible wlan ? complete 802.11n solution for 2.4ghz band ? 72.2mbps receive phy rate and 72.2mbps transmit phy rate using 20mhz bandwidth ? 150mbps receive phy rate and 150mbps transmit phy rate using 40mhz bandwidth ? compatible with 802.11n specification ? backward compatible with 802.11b/g devices while operating in 802.11n mode host interface ? complies with usb specification revision 2.0 standards supported ? ieee 802.11b/g/n compatible wlan ? ieee 802.11e qos enhancement (wmm) ? ieee 802.11h tpc, spectrum measurement ? 802.11i (wpa, wpa2). open, shared key, and pair-wise key authentication services mac features ? frame aggregation for increased mac efficiency (a-msdu, a-mpdu) ? low latency immediate high-throughput block acknowledgement (ht-ba) ? long nav for media reservation with cf-end for nav release ? phy-level spoofing to enhance legacy compatibility ? power saving mechanism ? channel management and co-existence ? multiple bssid feature allows the rtl8188cus to assume multiple mac identities when used as a wireless bridge ? transmit opportunity (txop) short inter-frame space (sifs) bursting for higher multimedia bandwidth peripheral interfaces ? general purpose input/output (10 pins) ? three configurable led pins ? configurable bluetooth coexistence interface continued on next page? free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 3 track id: jatr-2265-11 rev. 1. 0 phy features ? ieee 802.11n ofdm ? one transmit and one receive path (1t1r) ? 20mhz and 40mhz bandwidth transmission ? short guard interval (400ns) ? dsss with dbpsk and dqpsk, cck modulation with long and short preamble ? ofdm with bpsk, qpsk, 16qam, and 64qam modulation. convolutional coding rate: 1/2, 2/3, 3/4, and 5/6 ? maximum data rate 54mbps in 802.11g and 150mbps in 802.11n ? switch diversity for dsss/cck ? hardware antenna diversity ? selectable receiver fir filters ? programmable scaling in transmitter and receiver to trade quantization noise against increased probability of clipping ? fast receiver automatic gain control (agc) ? on-chip adc and dac free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 4 track id: jatr-2265-11 rev. 1. 0 3. application diagram 3.1. single-band 11n (1x1) solution (11n 1x1 mac/bb/rf+pa) antenna 2.4ghz pa tx/rx matching circuit 2.4 ghz transceiver tx i/q nv memory adc dac sps/ ldo regulators 40mhz crystal mac configuration control and memory ext interface baseband (phy) usb 2.0 host interface 3.3v rx i/q led wps push button figure 1. single-band 11n (1x1) solution (11n 1x1 mac/bb/rf+pa) free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 5 track id: jatr-2265-11 rev. 1. 0 4. pin assignments led0 / ant_sel_p led1 / ant_sel_n vd33a retx vd15a vd12a xi xo ck_bt_40m nc gpio0 / wl_act gpio1 / wl_rx gpio7 gpio6 gpio5 gpio 4 gnd vd12d gnd lx vd33a vd33d pape[0] gpio2 / bt_state gpio3 / bt_pri gpio8 / trswn[0] / led2 gpio9 nc figure 2. pin assignments 4.1. package identification ?green? package is indicated by a ?g? in the location marked ?t? in figure 2. free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 6 track id: jatr-2265-11 rev. 1. 0 5. pin descriptions the following signal type codes are used in the tables: i: input o: output t/s: tri-state bi-directional input/output pin s/t/s: sustained tri-state o/d: open drain p: power pin 5.1. usb transceiver interface table 1. usb transceiver interface symbol type pin no description hsdp io 30 high-speed usb d+ signal hsdm io 31 high-speed usb d- signal 5.2. power pins table 2. power pins symbol type pin no description lx p 37 switching regulator output vd33a p 2, 9, 12, 32, 36 vdd 3.3v for analog vd33d p 35 vdd3.3v for digital vd25p p 27 vdd 2.5v for internal nv-memory vd15a p 5, 8, 14 vdd 1.5v for analog vd15d p 26 vdd 1.5v for digital vd12a p 15, 29 analog 1.2v regulator output vd12d p 25, 39 digital 1.2v regulator output gnd p 28, 38, 40 ground retx p 13 24k (1%) precision resistor for bandgap 5.3. rf interface table 3. rf interface symbol type pin no description trswn[0]/ gpio8/led2 o 34 transmit/receive path select 0 shared with led2; can be se lected by control register pape[0] o 46 2.4ghz transmit power amplifier power enable 0 trswp[0] o 1 transmit/receive path select 0 free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 7 track id: jatr-2265-11 rev. 1. 0 symbol type pin no description tx2g_on[0] o 3 rf tx0 negative signal tx2g_op[0] o 4 rf tx0 positive signal rx2g_ip[0] i 6 rf rx0 positive signal rx2g_in[0] i 7 rf rx0 negative signal ant_sel_p/led0 o 10 antenna control positive signal shared with led0; can be sel ected by control register ant_sel_n/led1 o 11 antenna control negative signal shared with led1; can be se lected by control register 5.4. led interface table 4. led interface symbol type pin no description led0/ant_sel_p o 10 led pins (active low) shared with ant_sel_p; can be selected by control register led1/ant_sel_n o 11 led pins (active low) shared with ant_sel_n; can be selected by control register led2/trswn[0]/gpio8 o 34 led pins (active low) shared with trswn[0] or gpio8, can be selected by control register 5.5. clock and other pins table 5. clock and other pins symbol type pin no description xi i 16 40mhz osc input input of 40mhz crystal clock reference xo o 17 output of 40mhz crystal clock reference ck_bt_40m o 18 buffered 40m clock outputs for other peripheral ic pdn i 24 this pin can externally shutdown the rtl8191se-va1 (no requirement for extra power switch) this pin can also support the wlan ra dio-off function with host interface remaining connected. gpio0/wl_act io 20 general purpose input/output pin or bluetooth coexistence wl_act pin the wl_act signal indicates when the wlan is either transmitting or receiving in the 2.4ghz ism band. gpio1/wl_rx io 21 trap function: weakly pull high at power on to turn on ck_bt_40m. general purpose input/output pin or bluetooth coexistence wl_rx pin wl_rx is an indicator for wireless lan rx activity. gpio2/bt_state io 22 general purpose input/output pin or bluetooth coexistence bt_stat pin the btstat signal indicates when normal bluetooth packets are being transmitted or received. free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 8 track id: jatr-2265-11 rev. 1. 0 symbol type pin no description gpio3/bt_pri io 23 general purpose input/output pin or bluetooth coexistence bt_pri pin the bt_pri signal indicates when a high priority bluetooth packet is being transmitted or received. gpio4 io 41 general purpose input/output pin gpio5 io 42 general purpose input/output pin gpio6 io 43 general purpose input/output pin gpio7 io 44 general purpose input/output pin gpio8/trswn[0]/ led2 io 34 general purpose input/output pin, rf tx/rx path select, and led2 gpio9 io 33 general purpose input/output pin nc - 19, 45 not connected free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 9 track id: jatr-2265-11 rev. 1. 0 6. electrical and thermal characteristics 6.1. temperature limit ratings table 6. temperature limit ratings parameter minimum maximum units storage temperature -55 +125 c ambient operating temperature 0 70 c junction temperature 0 125 c 6.2. dc characteristics table 7. dc characteristics symbol parameter minimum typical maximum units vd33a, vd33d 3.3v i/o supply voltage 3.135 3.3 3.465 v vd12a, vd12d 1.2v core supply voltage 1.10 1.2 1.32 v vd15a, vd15d 1.5v supply voltage 1.425 1.5 1.575 v idd33 3.3v rating current - - 600 ma free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 10 track id: jatr-2265-11 rev. 1. 0 7. mechanical dimensions 7.1. mechanical dimensions notes symbol dimension in mm dimension in inch min nom max min nom max a 0.75 0.85 1.00 0.030 0.034 0.039 a 1 0.00 0.04 0.05 0.000 0.001 0.002 a 2 0.55 0.65 0.80 0.022 0.026 0.032 a 3 0.20ref 0.008ref b 0.15 0.20 0.25 0.006 0.008 0.010 d 6.50bsc 0.256bsc d2 4.85 5.10 5.35 0.191 0.201 0.211 e 4.5bsc 0.177bsc e2 2.25 2.50 2.75 0.088 0.098 0.108 e 0.40bsc 0.016bsc l 0.30 0.40 0.50 0.012 0.016 0.020 note1: controlling dimension: millimeter (mm). note2: reference document: jedec mo-220. free datasheet http:///
realtek confidential files the document authorized to null 2010-09-06 11:05:54 rtl8188cus datasheet single-chip ieee 802.11b/g/n 1t1r wlan controller with usb2.0 interface (qfn-46) 11 track id: jatr-2265-11 rev. 1. 0 8. ordering information table 8. ordering information part number package status RTL8188CUS-GR qfn-46, ?green? package mass production note: see page 5 for package identification. realtek semiconductor corp. headquarters no. 2, innovation road ii, hsinchu science park, hsinchu 300, taiwan, r.o.c. tel: 886-3-5780211 fax: 886-3-5776047 www.realtek.com free datasheet http:///

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