Details

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BUY AT27C040-70PC https://www.utsource.net/itm/p/438989.html
Octal Edge-Triggered D-Type Flip-Flops With 3-State Outputs 20-SOIC -40 to 85

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	4.5	-	5.5	V
Standby Current	ICC(STBY)	VCC = 5V, All pins High	-	1	-	μA
Active Current	ICC(ACTIVE)	VCC = 5V, Continuous Read	-	30	-	mA
Output High Level Voltage	VOH	IO = -1mA, VCC = 5V	2.4	-	5.0	V
Output Low Level Voltage	VOL	IO = 16mA, VCC = 5V	0.0	-	0.4	V
Access Time	tAA	VCC = 5V, 0°C to 70°C	-	70	-	ns
Data Hold Time	tHD(DATA)	After CE Low, WE Low	0	-	15	ns
Address Setup Time	tAS	Before CE Low, WE Low	10	-	-	ns
Chip Enable Pulse Width	tCEP	Minimum pulse width for CE	10	-	-	ns
Write Enable Pulse Width	tWEP	Minimum pulse width for WE	10	-	-	ns
Data Retention	-	VCC = 0V, 85°C	-	-	10	years

Instructions:

1. Power Supply: Ensure the supply voltage (V_CC) is within the range of 4.5V to 5.5V.
2. Standby Mode: To minimize power consumption, ensure all pins are set to a high state when the device is not in use.
3. Active Mode: During continuous read operations, the active current should be monitored to avoid exceeding 30mA.
4. Output Levels: Verify that the output high level voltage (VOH) and output low level voltage (VOL) meet the specified conditions for proper interfacing with other components.
5. Timing Parameters:
   • Access Time (t_AA): Ensure the access time is at most 70ns under operating conditions.
   • Data Hold Time (t_HD(DATA)): Data must be held for at least 15ns after the chip enable (CE) and write enable (WE) signals go low.
   • Address Setup Time (t_AS): Addresses must be stable at least 10ns before the CE and WE signals go low.
   • Chip Enable Pulse Width (t_CEP): The minimum pulse width for the chip enable signal should be at least 10ns.
   • Write Enable Pulse Width (t_WEP): The minimum pulse width for the write enable signal should be at least 10ns.
6. Data Retention: The device retains data for up to 10 years when the supply voltage is 0V and the temperature is 85°C.
7. Handling Precautions: Handle the device with care to avoid electrostatic discharge (ESD) damage. Use appropriate ESD protection measures during handling and installation.

(For reference only)