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MX580UH-883B MX580UH-883B MX580UH883B Datasheet

The 29C93 is a Terminal Rate Adaptor Circuit (TRAC) performing the speed adaption of synchronous and asynchronous V24 terminals to the ISDN "B" channel at 64 Kbps.TheTRACis directlyconnectedtothe serial bus extension provided by the 29C90 (DPC). The 29C91 (Digital Loop Controller) supplies the Master Clock, Bit Clock and Frame Synchronization to the TRAC. In asynchronous mode,it is possible to exchange data between two terminals working at different speeds, howeveriaccording to ECMA1 02 specification,the two terminals must use the same intermediate rate. For synchronous terminals, the TRAC is able to work with network independent clocks without addition of exterr at crrcuits. In X21 applications,the V24 interface from the TRAC should be directly connected to the X21 controller (HC 55421) serial interface. The microprocessor receives the distant terminal parameters, using external memory for buffering.
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Parameter	Symbol	Test condition		Grade	MIN	MAX.	Unit	Notes
Operating current	lcci	Burst length = 1	/CAS latency = 2	-A80		550	mA	1
		tRC > tRC(MIN ), lo = 0 rfiA	/CAS latency = 2	-A10		550
			/CAS latency = 3	-A80		550
			/CAS latency = 3	-A10		550
Precharge standby current in	Icc2P	CKE " VIL(MAX ), tCK = 15 ns				5	mA
power down mode	lcc2PS	CKE " VL(MAX ), tCK = o				5	mA
Precharge standby current in non power down mode	Icc2N	CKE > VIH(MIN.), tCK = 1 5 ns, /CS > VIH(MIN.), Input signals are changed one time during 30 ns.				100	mA
Precharge standby current in non power down mode	lcc2NS	CKE > VIH(MIN.), tCK = o , Input signals are stable.				40	mA
Active standby current in	ICC3P	CKE " VIL(MAX ), tCK = 15 ns				25	mA
power down mode	ICC3PS	CKE " VIL(WIAX ), tCK = o				20	mA
Active standby current in non power down mode	ICC3N	CKE > VIH(MIN.), tCK = 1 5 HS, /CS > VIH(MIN.), Input signals are changed one time during 30 ns.				150	mA
Active standby current in non power down mode	ICC3NS	CKE > VIH(MIN.), tCK = o , Input signals are stable.				150	mA
Operating current	ICC4	tCK > tCK(MIN )	/CAS latency = 2	-A80		600	mA	2
(Burst mode)		lo = OmA	/CAS latency = 2	-A10		475
			/CAS latency = 3	-A80		725
			/CAS latency = 3	-A10		625
CBR (Auto) refresh current	lccs	tRC > tRC(MIN )	/CAS latency = 2	-A80		1 150	mA	3
			/CAS latency = 2	-A10		1 150
			/CAS latency = 3	-A80		1 150
			/CAS latency = 3	-A10		1 150
Self refresh current	ICC6	CKE0.2V				10	mA
Input leakage current	L)	VI = 0 t0 3.6 V, All other pins not under test = 0 V			-5	+5
Output leakage current	IO(L)	Dour iS disabled, Vo = 0 t0 3.6 V			-1.5	+1.5
High level output voltage	VOH	la= -4 mA			2 4		V
Low level output voltage	VOL	10 =+4 mA				0.4	V

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TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards.

5. Output Diode Selection (D) In the step-up regulator, the switching diode must with- stand a reverse voltage and be able to conduct the peak output current of the UC2577. Therefore a suitable diode must have a minimum reverse breakdown voltage greater than the circuit output voltage, and should also be rated for average and peak current greater than ILOADmax and IDpk. Because of their low forward voltage drop (and thus higher regulator eiciencies), Schottky barrier diodes are often used in switching regulators. Re- fer to Figure 7 for recommended part numbers and volt- age ratings of lA and 3A diodes.

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