HM63021

HM63021 Series 2048-word × 8-bit Line Memory The HM63021 is a 2048-word × 8-bit static serial access memory (SAM) with separate data inputs and outputs. Since it has an internal address counter, no external address signal is required and internal addresses are scanned serially. Using five different address scan modes, it is applicable to FIFO memories, double-speed conversions, 1H delay lines, and 1H/2H delay lines for digital TV signals. Its minimum cycle times are 28 ns and 34 ns, corwww.DataSheet4U.com responding to 8 fsc of PAL TV and NTSC TV signals. All inputs and outputs are TTL-compatible. High speed (cycle time 28/34/45 ns (min)) Completely static memory (no refresh required) 8-bit SAM with separate I/O Low power (250 mW typ active) Single 5 V supply TTL compatible Ordering Information Type No. HM63021P-28 HM63021P-34 HM63021P-45 HM63021P28N HM63021FP-28 HM63021FP-34 HM63021FP-45 HM63021FP28N Cycle time 28 ns 34 ns 45 ns 28 ns 28 ns 34 ns 45 ns 28 ns 28-pin plastic SOP (FP-28DA) Package 300-mil, 28-pin plastic DIP (DP-28N) Features Five modes for various applications Corresponds to digital TV system with 4 fsc sampling (PAL, NTSC) Decoder signal output pin (fewer external circuits) Asynchronous read/write operation — Separate address counters for read/write — No address input required Pin Arrangement D 1H/2H TBC DSC TBCE MODE1 RCLK RRES Din0 Din1 Din2 Din3 Din4 Din5 Din6 Din7 WE High Z VSS Modes 1 28 Read 2 27 control 3 26 4 25 5 24 6 23 7 22 8...