DP8420A National Semiconductor, DP8420A Datasheet - Page 15
![no-image](/images/manufacturer_photos/0/4/469/national_semiconductor_sml.jpg)
DP8420A
Manufacturer Part Number
DP8420A
Description
(DP8420A - DP8422A) microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
Manufacturer
National Semiconductor
Datasheet
1.DP8420A.pdf
(58 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DP8420AV-25
Manufacturer:
NSC
Quantity:
1 831
- Current page: 15 of 58
- Download datasheet (825Kb)
4 0 Port A Access Modes
4 3 EXTENDING CAS WITH EITHER ACCESS MODE
In both access modes once AREQ is negated RAS and
DTACK if programmed will be negated If ECAS0 was as-
serted (0) during programming CAS (CASs) will be negated
FIGURE 9b Access Mode 1 Extending CAS
FIGURE 9a Access Mode 0 Extending CAS
(Continued)
15
with AREQ If ECAS0 was negated (1) during programming
CAS (CASs) will continue to be asserted after RAS has
been negated given that the appropriate ECAS inputs are
asserted This allows a DRAM to have data present on the
data out bus while gaining RAS precharge time
TL F 8588 – 61
TL F 8588 – 63
Related parts for DP8420A
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![MC1408P8](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
National Semiconductor [8-Bit D/A Converter]
Manufacturer:
National Semiconductor
Datasheet:
![CS1301](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
National Semiconductor [Media Coprocessor]
Manufacturer:
National Semiconductor
Datasheet:
![LM4832N](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
![LM4832M](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
![LM4546](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
AC97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
Manufacturer:
National Semiconductor
![LP2981AIM5X-2.7](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
![LP3988IMFX-2.6](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
![LPV321M7X](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers
Manufacturer:
National Semiconductor
Datasheet:
![ADC0882CCN](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
8-bit 20 MSPS flash A/D converter.
Manufacturer:
National Semiconductor
Datasheet:
![LM837N](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Low Noise Quad Operational Amplifier
Manufacturer:
National Semiconductor
Datasheet:
![DS3650J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Quad Differential Line Receivers
Manufacturer:
National Semiconductor
Datasheet:
![DS3662J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Quad High Speed Trapezoidal? Bus Transceiver
Manufacturer:
National Semiconductor
Datasheet:
![DS7820A](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Dual Line Receiver
Manufacturer:
National Semiconductor
Datasheet:
![DP8481J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
TTL to 10k ECL Level Translator with Latch
Manufacturer:
National Semiconductor
Datasheet: