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PDF HM62864 Data sheet ( Hoja de datos )
| Número de pieza | HM62864 | |
| Descripción | 65536-word 8-bit High Speed CMOS Static RAM | |
| Fabricantes | ETC | |
| Logotipo |  |
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HM62864 Series
65536-word × 8-bit High Speed CMOS Static RAM
ADE-203-255B (Z)
Rev. 2.0
Jul. 4, 1995
Description
The Hitachi HM62864 is a CMOS static RAM organized 64-kword × 8-bit. It realizes higher density,
higher performance and low power consumption by employing 0.8 µm Hi-CMOS process technology. It
offers low power standby power dissipation; therefore, it is suitable for battery backup systems. The
device, packaged in a 525-mil SOP (460-mil body SOP) and a 8 × 20 mm TSOP with thickness of 1.2
mm, is available for high density mounting. TSOP package is suitable for cards.
Features
• High speed
— Fast access time: 55/70/85 ns (max)
• Low power
— Active: 50 mW (typ) (f = 1 MHz)
— Standby: 2 µW (typ)
• Single 5 V supply
• Completely static memory
No clock or timing strobe required
• Equal access and cycle times
• Common data input and output
Three state output
• Directly TTL compatible
All inputs and outputs
• Capability of battery backup operation
2 chip selection for battery backup
1 page  
HM62864 Series
Function Table
CS1 CS2 OE
WE Mode
VCC Current
HX
X
X
Not selected
ISB, ISB1
XL
X
X
Not selected
ISB, ISB1
LH
H
H Output disable ICC
LH
L
H Read
I CC
LH
H
L Write
I CC
LH
L
L Write
I CC
Note: X: High or Low
I/O Pin
High-Z
High-Z
High-Z
Dout
Din
Din
Ref. Cycle
—
—
—
Read cycle (1) to (3)
Write cycle (1)
Write cycle (2)
Absolute Maximum Ratings
Parameter
Power supply voltage*1
Terminal voltage *1
Power dissipation
Operating temperature
Symbol
VCC
VT
PT
Topr
Storage temperature
Tstg
Storage temperature under bias
Tbias
Notes: 1. Relative to VSS
2. VT min: –3.0 V for pulse half-width ≤ 50 ns
3. Maximum voltage is 7.0V
Value
–0.5 to +7.0
–0.5 *2 to VCC + 0.3*3
1.0
0 to +70
–55 to +125
–10 to +85
Unit
V
V
W
°C
°C
°C
Recommended DC Operating Conditions (Ta = 0 to +70°C)
Parameter
Symbol
Supply voltage
VCC
VSS
Input high (logic 1) voltage
VIH
Input low (logic 0) voltage
VIL
Note: 1. VIL min: –3.0 V for pulse half-width ≤ 50 ns
Min
4.5
0
2.2
–0.3 *1
Typ
5.0
0
—
—
Max
5.5
0
VCC + 0.3
0.8
Unit
V
V
V
V
5
5 Page 
Write Timing Waveform (1) (OE Clock)
HM62864 Series
Address
OE
CS1
CS2
WE
Dout
Din
t WC
Valid address
t AW
t CW
*1
t AS
t WP
t WR
t OHZ
High Impedance
High Impedance
t DW
t DH
Valid data
Notes:1.If CS1 goes low or CS2 goes high simultaneously with WE going low or
after WE going low, the outputs remain in the high impedance state.
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HM62864.PDF ] | |
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