MITSUBISHI 〈DIGITAL ASSP〉 MITSUBISHI 〈DIGITAL ASSP〉 M66261FP M66261FP 6 CROSSPOINT × 5 CROSSPOINT SWITCH MIXING FUNCTION 6×5 SWITCH withwith MIXING FUNCTION DESCRIPTION The M66261 is an integrated circuit consisting of a 6 × 5 cross point switch capable of selecting 30 analog switches with mixing registance respectively by serial control inputs. Using the M66261 with an external standard Op-Amp, 6 analog input signals can be mixed and output to any of 5 outputs freely by serial control inputs. PIN CONFIGURATION (TOP VIEW) FEATURES • High noise margin ......................... Schmidt trigger circuit built in CKS and LE • Switching and mixing function possible with standard OpAmp. • Excellent crosstalk characteristic .......................... –90dB [fIN = 3kHz, VIN = –10dBV] (typ.) • Line backup function provided in case of a power failure ............................................... (Effective when RD is “L.”) • Power supply pins for control circuit (V CC ) and for crosspoint switch circuit (VCC(switch)) are provided separately. 24 23 22 21 20 19 18 17 16 15 14 13 M66261FP SHIFT CLOCK INPUT CKS → 1 SHIFT DATA INPUT A→ 2 DIRECT RESET INPUT RD → 3 X0 → 4 SWITCH INPUTS X2 → 5 X4 → 6 XOUTO ← 7 YS0 ← 8 YS1 ← 9 SWITCH OUTPUTS YOUT1 ← 10 YOUT2 ← 11 12 GND VCC ← LE LATCH ENABLE INPUT VCC(SWITCH) ← X1 ← X3 SWITCH INPUTS ← X5 NC → YS4 → YOUT4 → YOUT3 SWITCH OUTPUTS → YS3 → YS2 Outline 24P2N-B NC terminal : connect to GND APPLICATION Line switching with mixing function of telephone and communication equipments. BLOCK DIAGRAM DIRECT RESET INPUT SWITCH INPUTS SWITCH OUTPUTS X5 19 YOUT0 YS0 YOUT1 YS1 YOUT2 YS2 YOUT3 YS3 YOUT4 YS4 X4 6 X3 20 X2 5 X1 21 X0 4 SHIFT CLOCK INPUT LATCH ENABLE INPUT RD LE CKS 3 23 1 SHIFT DATA INPUT A 2 7 5 4 3 2 1 0 8 10 11 10 9 8 7 6 17 16 15 14 13 12 9 11 13 15 23 22 21 20 19 18 29 28 27 26 25 24 R LE QL0 QL1 QL2 QL3 QL4 DL0 DL1 DL2 DL3 DL4 LATCH CIRCUIT (× 30) CK DIN QS0 QS1 QS2 QS3 QS4 30-BIT SHIFT REGISTER Note 1: n 14 16 17 QL28 QL29 DL28 DL29 QS28 QS29 QLn 6 × 5 CROSSPOINT SWITCH 18 NC 12 GND 22 VCC (SWITCH) CONTROL CIRCUIT 24 VCC n = 0~29 Note 2 : Connect NC terminal to GND 1 MITSUBISHI 〈DIGITAL ASSP〉 M66261FP 6 × 5 CROSSPOINT SWITCH with MIXING FUNCTION FUNCTION Serial data input A is the data input of the first step of 30 BIT SHIFT REGISTER and when latch enable input LE is “L”, the signal of A shifts shifting registers one by one when shift clock input CKS changes from “L” to “H”, in units of 32 bits. The first 2 bits of shifting data are ignored and the other 30 bits are stored into LATCH CIRCUIT in parallel when latch enable LE changes from “L” to “H”. Analog switches come on in a low-impedance state when the output of the corresponding latch circuit is “H.” They come off in a high-impedance stage when the output of the corresponding circuit is “L.” When direct reset input RD changes to “L,” switches 0 and 29 only come on, and others come off. This function backs up the line if a power failure occurs. FUNCTION TABLES (1) 30-bit shift register (Note 3) Operation mode Shift Inputs RD × × A L H Internal outputs CKS ↑ ↑ LE L L QS0 L H QS1 Q0S0 Q0S0 QS2 Q0S1 Q0S1 QS3 Q0S2 Q0S2 LE × H L QL0 H QS0 Q0L0 QL1 L QS1 Q0L1 QL2 L QS2 Q0L2 QL3 L QS3 Q0L3 · · · · · · · · · · · · · · · QS27 Q0S26 Q0S26 QS28 Q0S27 Q0S27 QS29 Q0S28 Q0S28 QL27 L QS27 Q0L27 QL28 L QS28 Q0L28 QL29 H QS29 Q0L29 (2) Latch circuit [× 30] (Note 3) Operation mode Reset Shift Inputs RD L H H A × × × Internal outputs CKS × × × · · · · · · · · · · · · · · · · · · · · (3) 6 × 5 cross point switch QLn L H Status of switch No. n OFF ON Table 1. Latch Output (QLN) and Corresponding Switch No. n Latch output Switch No. QL0 0 QL1 1 QL2 2 QL3 3 · · · · · · · · · · QL27 27 QL28 28 QL29 29 Note 3. ↑ : Change from “L” to “H” × : “H” or “L” 0 Q S : The content of shift register before CKS changed 0 Q L : The content of latch circuit before LE changed from “H” to “L” OPERATION TIMING CHART RD 32 bits 32 bits 31 30 29 28 27 31 30 29 28 27 CKs A 1 0 1 0 Set switch No. LE Dummy data Switch on/off setting 2 Dummy data Switch on/off setting MITSUBISHI 〈DIGITAL ASSP〉 M66261FP 6 × 5 CROSSPOINT SWITCH with MIXING FUNCTION ABSOLUTE MAXIMUM RATINGS (Ta = –20°C to 75°C, VCC = VCC (switch) unless otherwise noted) Symbol Parameter VCC Supply voltage VI Input voltage RD, A, CKS, LE X0 ~ X5 VO Output voltage YS0 ~ YS4, YOUT0 ~ YOUT4 Pd Tstg Power dissipation Storage temperature Conditions Rating –0.5 ~ +7.0 –0.5 ~ VCC +0.5 –0.5 ~ VCC +0.5 Unit V –0.5 ~ VCC +0.5 V 500 –65 ~ 150 mW °C V RECOMMENDED OPERATIONAL CONDITIONS (Ta = –20°C to 75°C, VCC = VCC (switch) unless otherwise noted) Symbol VCC Parameter Supply voltage RD, A, CKS, LE VI Input voltage VO Output voltage Topr Operating temperature Limits Typ. Min. 2.8 0 0 X0 ~ X5 YS0 ~ YS4, YOUT0 ~ YOUT4 Unit Max. 5.5 VCC VCC 0 VCC –20 75 V V V V °C ELECTRICAL CHARACTERISTICS (Ta = –20°C to 75°C, VCC = VCC (switch) 2.8V ~ 5.5V and GND = 0V unless otherwise noted) Test conditions Parameter Symbol Min. 0.8 × VCC VIH VIL VT+ VT– “H” Input voltage “L” Input voltage Positive-going threshold voltage Negative-going threshold voltage RI Input resistance Xn→YSm n = 0 ~ 5 m = 0 ~ 4 VI (Xn) = 0.5 × VCC (For any one of switches) 15 Rf Feedback resistance YOUTm →YSm VI (YOUTm) = 0.5 × VCC (For any one of switches) ∆R On resistance difference (Rf and RI) (1 block) RD, A Limits Typ. V V V V 25 40 kΩ 15 25 40 kΩ 0.9 1 1.1 — 1.0 µA 200 400 1.0 –1.0 µA VI∗ IOFF Off-state leakage current Switches off; = VIH or VIL (for each of Xn, Ysm and YOUTm) ICC Quiescent supply current VI∗ = VCC or GND “H” input current “L” input current VI∗ IIH IIL = VCC VI∗ = GND VCC =2.8V VCC = 5.5V Unit 0.2 × VCC 0.8 × VCC 0.65 × VCC 0.35 × VCC 0.2 × VCC CKS, LE Max. µA µA VI∗ = VI (RD, A, CKS, LE) 3 MITSUBISHI 〈DIGITAL ASSP〉 M66261FP 6 × 5 CROSSPOINT SWITCH with MIXING FUNCTION TIMING CONDITIONS (Ta = –20°C to 75°C, VCC = VCC (switch) = 2.8V ~ 5.5V and GND = 0V unless otherwise noted) Symbol tc tw± (CKs) tw (LE) tw (RD) tsu (A-CKs) th (CKs-A) trec (RD-LE) trec (CKs-LE) Parameter Conditions Clock cycle Clock pulse width Latch enable pulse width Reset pulse width A setup time before CKS A hold time after CKS LE recovery time after RD LE recovery time after CKS (Note 4) Limits Min. 1000 400 1000 1000 400 200 1000 1000 Typ. Max. Unit ns ns ns ns ns ns ns ns CROSSTALK CHARACTERISTICS Symbol — Parameter Test conditions ∗∗ Crosstalk freqency Limits Min. Typ. –90 ∗∗ : VI = –10dBV, fIN = 3kHz, Other input: 1kΩ at terminal Ta = 25°C, VCC = +2.5V, GND = –2.5V VCC (switch) = +2.5V Standard Op-Amp: M5228P (connected externally) RL = 10kΩ Crosstalk: 20 log 10 VO VI Note 4: TEST CIRCUIT Input PG Output DUT 50Ω 4 VCC CL (1) Pulse generator (PG) characteristics tr = tf = 6ns (10%~90%) VIN = 0 to VCC (2) CL includes stray wiring capacitance and probe input capacitance. (3) Reference voltage Input voltage: 0.5 × VCC Output voltage : 0.5 × VCC Max. Unit dB MITSUBISHI 〈DIGITAL ASSP〉 M66261FP 6 × 5 CROSSPOINT SWITCH with MIXING FUNCTION TIMING CHART RD trec(RD−LE) tw(RD) tc CKs tw−(CKs) tw+(CKs) A tsu(A−CKs) th(CKs−A) LE trec(CKs−LE) tw(LE) 5 MITSUBISHI 〈DIGITAL ASSP〉 M66261FP 6 × 5 CROSSPOINT SWITCH with MIXING FUNCTION APPLICATION EXAMPLE (Line backup function provided in case of a power failure) When direct reset input RD changes to “L”, switches 0 and 29 only come on, and others come off. In a power failure, using the following connection, communication can be maintained between Line and Host phone in case RD is “L”. In this time, the voltage 2.8 ~ 5.5V must be supplied on VCC and VCC (switch). 6 × 5 CROSSPOINT SWITCH EXTENSION MICROPHONE INPUT ALAME INPUT DOOR PHONE INPUT PLAYBACK INPUT Inputs HOST PHONE MICROPHONE INPUT X0 VCC 0 X1 VCC (SWITCH) X2 X3 2.8~5.5V X4 GND LINE INPUT X5 YS4 YOUT4 YS3 YOUT3 YS2 YOUT2 YS1 YOUT1 YOUT0 YS0 29 Vref − + − + RECORDING OUTPUT Outputs 6 − + − HOST PHONE SPEAKER OUTPUT + DOOR PHONE OUTPUT − EXTENSION MICROPHONE OUTPUT + LINE OUTPUT STANDARD Op-Amp