HT23C512-250-28DIP中文资料
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HT23C512
CMOS 64K ´8-Bit Mask ROM
Block Diagram
Rev.1.101August 30,2002
Features
·Operating voltage:2.7V~5.5V ·Low power consumption
-Operation:25mA max.(V CC =5V)
10mA max.(V CC =3V)
-Standby:30m A max.(V CC =5V)
10m A max.(V CC =3V)
·Access time:150ns max.(V CC =5V)
250ns max.(V CC =3V)
·65536´8-bit of mask ROM
·Mask options:chip enable CE/CE/OE1/OE1and
output enable OE/OE/NC
·TTL compatible inputs and outputs ·Tristate outputs ·Fully static operation ·28-pin DIP/SOP package
General Description
The HT23C512is a read-only memory with high perfor-mance CMOS storage device whose 512K of memory is arranged into 65536words by 8bits.
For application flexibility,the chip enable and output en-able control pins can be selected as active high or active low.This flexibility not only allows easy interface with most microprocessors,but also eliminates bus conten-tion in multiple bus microprocessor systems.An addi-tional feature of the HT23C512is its ability to enter the standby mode whenever the chip enable (CE/CE)is in-active,thus reducing current consumption to below 30m A.The combination of these functions makes the chip suitable for high density low power memory appli-cations.
Pin Assignment
Pin Description
Pin Name I/O Description
A0~A15I Address inputs
D0~D7O Data outputs
CE/CE/OE1/OE1I Chip enable/Output enable input
OE/OE/NC I Output enable input
VSS¾Negative power supply,ground
VCC¾Positive power supply
Absolute Maximum Ratings
Supply Voltage............................................-0.3V to6V Storage Temperature............................-50°C to125°C Input Voltage....................................-0.3V to V CC+0.3V Operating Temperature...........................-40°C to85°C
Note:These are stress ratings only.Stresses exceeding the range specified under²Absolute Maximum Ratings²may cause substantial damage to the device.Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-ity.
D.C.Characteristics
Supply voltage:2.7V~3.6V Ta=-40°C to85°C
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V CC Conditions
V CC Operating Voltage¾¾ 2.7¾ 3.6V
I CC Operating Current3V O/P Unload,f=5MHz¾¾10mA
V IL Input Low Voltage3V¾V SS¾0.4V V IH Input High Voltage3V¾ 2.0¾V CC V
V OL Output Low Voltage3V I OL=2.1mA¾¾0.4V V OH Output High Voltage3V I OH=-0.4mA 2.4¾V CC V
Rev.1.102August30,2002