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Ordering number : EN4430C
22897HA (OT)/52595TH (OT)/N1993JN/40893JN A8-9957, 58, 59, No. 4430-1/9
Overview
The LC33832 series is composed of pseudo static RAM
that operates on a single 5 V power supply and is
organized as 32768 words × 8 bits. By using memory
cells each composed of a single transistor and capacitor,
together with peripheral CMOS circuitry, this series
achieves ease of use with high density, high speed, and
low power dissipation. The LC33832 series can easily
accomplish auto-refresh and self-refresh by means of
OE/RFSH input. As with asynchronous static RAM, WE
input uses a system for incorporating input data at the WE
rise, thereby facilitating interfacing with a microcomputer.
The LC33832 series features pin compatibility with 256 K
static RAM (the LC36256A series), and available
packages are the standard 28-pin DIP with widths of 600
mil or 300 mil, and the SOP with a width of 450 mil.
CE-only refresh can be accomplished by selecting address
256 (A0 to A7) within 4 ms.
Features
• 32768 words × 8 bits configuration
• Single 5 V ±10% power supply
• All input and output (I/O) TTL compatible
• Fast access times and low power dissipation
• 4 ms refresh using 256 refresh cycle
• CE-only refresh, auto-refresh, and self-refresh
• Low-power version: 100 µA self-refresh current
• Package
DIP28-pin (600 mil) plastic package: LC33832P, PL
DIP28-pin (300 mil) plastic package: LC33832S, SL
SOP28-pin (450 mil) plastic package: LC33832M, ML
Package Dimensions
unit: mm
3012A-DIP28
unit: mm
3133-DIP28
SANYO: DIP28
[LC33832P, PL]
SANYO: DIP28
[LC33832S, SL]
LC33832P, S, M, PL, SL, ML-70/80/10
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
256 K (32768 words × 8 bits) Pseudo-SRAM
CMOS LSI
Parameter
LC33832P, S, M, PL, SL, ML
-70 -80 -10
CE access time 70 ns 80 ns 100 ns
OE access time 30 ns 35 ns 40 ns
Cycle time 115 ns 130 ns 160 ns
Current drain
Operating 65 mA 60 mA 50 mA
Standby 1 mA/100 µA (L version)
• CE access time/OE access time/Cycle time/Current drain
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LC33832P, S, M, PL, SL, ML-70/80/10
No. 4430-2/9
Block Diagram
unit : mm
3158-SOP28
[LC33832M, ML]
SANYO: SOP28
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LC33832P, S, M, PL, SL, ML-70/80/10
No. 4430-3/9
Pin Assignment Pin Functions
A0 to A14 Address input
WE Read/Write input
OE/RFSH Output-enable input/ refresh input
CE Chip-enable input
I/O1 to I/O8 Data input/output
V
CC
Power supply
GND Ground
Functional Logic
CE OE WE A0 to A7 A8 to I/O1 State
/RFSH A14 to I/O8
H H X X X HZ Standby
L L H VX VX OUT Read
L H L VX VX IN Write
L H H VX X HZ CE-only refresh
H L X X X HZ Self-refresh
H NP X X X HZ Auto-refresh
H...................High-level input of VIN= 6.5 V to VIH(min)
L....................Low-level input of VIN= VIL(max) to –1.0 V
X....................High- or low-level input
NP.................Negative-polarity pulse input
VX.................“IN” when CE = L is confirmed, then “X”
HZ.................High impedance
IN..................Input state
OUT..............Output state