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TP3054B Scheda tecnica(PDF) 6 Page - Texas Instruments |
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TP3054B Scheda tecnica(HTML) 6 Page - Texas Instruments |
6 / 17 page TP3054B, TP3057B, TP13054B, TP13057B MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER SCTS042A – MAY 1990 – REVISED JULY 1996 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 operating characteristics, over operating free-air temperature range, VCC = 5 V ±5%, VBB = –5 V ±5%, GND at 0 V, VI = 1.2276 V, f = 1.02 kHz, transmit input amplifier connected for unity gain, noninverting (unless otherwise noted) timing requirements PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT fclock(M) Frequency of master clock MCLKX and MCLKR Depends on the device used and BCLKX/CLKSEL 1.536 1.544 2.048 MHz fclock(B) Frequency of bit clock, transmit BCLKX 64 2.048 kHz tw1 Pulse duration, MCLKX and MCLKR high 160 ns tw2 Pulse duration, MCLKX and MCLKR low 160 ns tr1 Rise time of master clock MCLKX and MCLKR Measured from 20% to 80% 50 ns tf1 Fall time of master clock MCLKX and MCLKR Measured from 20% to 80% 50 ns tr2 Rise time of bit clock, transmit BCLKX Measured from 20% to 80% 50 ns tf2 Fall time of bit clock, transmit BCLKX Measured from 20% to 80% 50 ns tsu1 Setup time, BCLKX high (and FSX in long-frame sync mode) before MCLKX ↓ First bit clock after the leading edge of FSX 100 ns tw3 Pulse duration, BCLKX and BCLKR high VIH = 2.2 V 160 ns tw4 Pulse duration, BCLKX and BCLKR low VIL = 0.6 V 160 ns th1 Hold time, frame sync low after bit clock low (long frame only) 0 ns th2 Hold time, BCLKX high after frame sync ↑ (short frame only) 0 ns tsu2 Setup time, frame sync high before bit clock ↓ (long frame only) 80 ns td1 Delay time, BCLKX high to data valid Load = 150 pF plus 2 LSTTL loads‡ 0 140 ns td2 Delay time, BCLKX high to TSX low Load = 150 pF plus 2 LSTTL loads‡ 140 ns td3 Delay time, BCLKX (or 8 clock FSX in long frame only) low to data output disabled 50 165 ns td4 Delay time, FSX or BCLKX high to data valid (long frame only) CL = 0 pF to 150 pF 20 165 ns tsu3 Setup time, DR valid before BCLKR ↓ 50 ns th3 Hold time, DR valid after BCLKR or BCLKX ↓ 50 ns tsu4 Setup time, FSR or FSX high before BCLKR or BCLKR ↓ Short-frame sync pulse (1 or 2 bit clock periods long) (see Note 3) 50 ns th4 Hold time, FSX or FSR high after BCLKX or BCLKR ↓ Short-frame sync pulse (1 or 2 bit clock periods long) (see Note 3) 100 ns th5 Hold time, frame sync high after bit clock ↓ Long-frame sync pulse (from 3 to 8 bit clock periods long) 100 ns tw5 Minimum pulse duration of the frame sync pulse (low level) 64 kbps operating mode 160 ns † All typical values are at VCC = 5 V, VBB = –5 V, and TA = 25°C. ‡ Nominal input value for an LSTTL lead is 18 k Ω. NOTE 3: For short-frame sync timing, FSR and FSX must go high while their respective bit clocks are high. |
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