HM6216255H Datasheet, PDF (7/17 Pages) Hitachi Semiconductor – 4M high Speed SRAM (256-kword x 16-bit)

HM6216255H Series
AC Characteristics (Ta = 0 to +70°C, V_CC = 5.0 V ± 10 %, unless otherwise noted.)
Test Conditions
• Input pulse levels: 3.0 V/0.0 V
• Input rise and fall time: 3 ns
• Input and output timing reference levels: 1.5 V
• Output load: See figures (Including scope and jig)
5V
Dout Zo=50 Ω
RL=50 Ω
Dout
255 Ω
480Ω
5 pF
1.5 V
Output load (A)
Output load (B)
(for t_CLZ, t_OLZ, t_LBLZ, t_UBLZ, t_CHZ, t_OHZ,
t_LBHZ, t_UBHZ, t_WHZ, and t_OW)
Read Cycle
Parameter
Read cycle time
Address access time
Chip select access time
Output enable to output valid
Byte select to output valid
Output hold from address change
Chip select to output in low-Z
Output enable to output in low-Z
Byte select to output in low-Z
Chip deselect to output in high-Z
Output disable to output in high-Z
Byte deselect to output in high-Z
HM6216255H
-10
-12
Symbol Min Max Min
t _RC
10 — 12
t _AA
— 10 —
t _ACS
— 10 —
t _OE
—5
—
t_LB, t_UB
—5
—
t _OH
3
—3
t _CLZ
3
—3
t _OLZ
0
—0
t , _LBLZ t_UBLZ 0
—0
t _CHZ
—5
—
t _OHZ
—5
—
t , _LBHZ t_UBHZ —
5
—
-15
Max Min
— 15
12 —
12 —
6
—
6
—
—3
—3
—0
—0
6
—
6
—
6
—
Max Unit Notes
— ns
15 ns
15 ns
7
ns
7
ns
— ns
— ns 1
— ns 1
— ns 1
7
ns 1
7
ns 1
7
ns 1
7