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Part Numbert	Mfg	Packt	D/C	Descriptiont	Qty	Company/Contact
ROHM6904	ROHM	SOP-8	2008	原装现货。多谢您的关注，欢迎洽谈合作！	386	Beijing drow technology Co.,lt.. Contact:Drowdl Tel:86-10-82533151 Fax: Email: zhuoerdianzi@126.com

ROHM6904 Datasheet

The ExpressAlgorithm has been developed to improve the programming throughput times in a production environment. Up to ten 100-microsecond pulses are applied until the byte is venfied. No overprogramming is required. A flowchart of the express algorithm is shown in Figure l-3. Programming takes place when: a) Vcc is brought to the proper voltage, b) VPP is brought to the proper VH level, . c) theeE pin is low, d) theE pin is high, and e) the pin is low. Since the erased state is "1 in the array, programming of "O is required. The address to be programmed is set via pins AO-A13 and the data to be programmed is pre- sented to pins 00-07. When data and address are sta- ble, OE is high, CE is low and a low-going pulse on the P~M line programs that location.
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Parameter		Symbol	Conditions		Min	Typ.	Max	Unit
Output Voltage		VO	Tj=+25YC		-4.8	-5.0	-5.2	V
				-7.OV > Vi > -20V		15	150	mV
Line Regulation (Notel)		O	Tj =+25IC	-8V > Vi > -20V			100	mV
				1.OmA " 10 " 100mA		20	60	mV
Load Regulation (Notel)		O	TJ =+25IC	1.OmA " 10 " 40mA		10	30	mV
			-7.OV > Vi > -20V, 1.OmA " lo " 40mA		-4.75		-5.25	V
Output Voltage		VO	Vi = -10V, 1.OmA " lo " 70mA		-4.75		-5.25	V
Quiescent Current		lQ	Tj =+25IC			2.0	5.5	mA
Quiescent Current		lQ	Tj=+125IC				6.0	mA
Quiescent Current	With Line	CIQ	-8V > Vi > -20V				1.5	mA
Change	With Load	aQ	1.OmA " 10 " 40mA				0.1	mA
Output Noise Voltage		VN	TA = +25IC,10Hz " f " 100kHz			30		ccV
Ripple Rejection		RR	f = 120Hz, -8V > Vi > -18V Tj = +25IC		41	60		dB
Dropout Voltage		VD	TJ=+25IC			1.7		V

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DREQ must be held active until DACK becomes active. If DREQ is held active throughout the single transfer, HRQ will go inactive and release the bus to the system. It will again go active and, upon receipt of a new HLDA, another single transfer will be performed, unless a higher priority channel takes over. In 8080A, 8085A, 80C88, or 80C86 systems, this will ensure one full machine cycle execution between DMA transfers. Details of timing between the 82C237 and other bus control protocols will depend upon the characteristics of the microprocessor involved.

The R02073A-4 is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 315.05 MHz. This SAW is designed specifically for remote-control and wireless security trans- mitters operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy.

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