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HM53461P-10

製品説明
仕様・特性

HM53461 Series, HM53462 Series 65,536-word × 4-bit Multiport CMOS Video RAM The HM53461/HM53462 is a 262,144-bit multiport memory equipped with a 64 k-word × 4bit dynamic RAM port and a 256-word × 4-bit serial access memory (SAM) port. The SAM port is connected to an internal 1,024-bit data register through a 256-word × 4-bit serial read or write access control. In the read transfer cycle, the memory cell data is transferred from a selected word line of the RAM port to the data register. The RAM port has a write mask capability in addition to the conventional operation mode. Write bit selection out of four data bits can be achieved. The Hitachi 2 µm CMOS process achieves a fast serial access operation and low power dissipation. All inputs and outputs, including clocks, are TTL compatible. In HM53462, the RAM port has logic operation capability. By using this function, logic operation between memory data and input data can be done in one cycle. • Data transfer operation (between RAM and SAM) • Fast serial access operation asynchronized with RAM port (except data transfer cycle) • Real time read transfer capability • Write mask mode capability • Logic operation capability between Din and Dout (HM53462 Series) • SAM organization can be changed to 1024 × 1 (HM53462 Series) Ordering Information • Multiport organization (RAM; 64 k-word × 4-bit and SAM; 256 word × 4-bit) • Double layer polysilicon/polycide n-well CMOS process • Single 5 V (±10%) • Low power — Active: RAM: 380 mW max SAM: 220 mW max — Standby: 40 mW max. • Access Time — RAM: 100 ns/120 ns/150 ns — SAM: 40 ns/40 ns/60 ns • Cycle time — Random read or write cycle time (RAM): 190 ns/220 ns/260 ns — Serial read or write cycle time (SAM): 40 ns/40 ns/60 ns • TTL compatible • 256 refresh cycles: 4 ms • Refresh function — RAS-only refresh — CAS-before-RAS refresh — Hidden refresh Access Time HM53461P-10 100 ns HM53461P-12 120 ns HM53461P-15 Features Type No. 150 ns HM53461ZP-10 100 ns HM53461ZP-12 120 ns HM53461ZP-15 150 ns HM53461JP-10 100 ns HM53461JP-12 120 ns HM53461JP-15 150 ns HM53462P-10 100 ns HM53462P-12 120 ns HM53462P-15 150 ns HM53462ZP-10 100 ns HM53462ZP-12 120 ns HM53462ZP-15 150 ns HM53462JP-10 100 ns HM53462JP-12 120 ns HM53462JP-15 150 ns Package 400-mil, 24-pin plastic DIP (DP-24A) 24-pin plastic ZIP (ZP-24) 24-pin plastic SOJ (CP-24D) 400-mil, 24-pin plastic DIP (DP-24A) 28-pin plastic ZIP (ZP-24) 300-mil, 24-pin plastic SOJ (CP-24D) 1 Home Print

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