hm5216805 Renesas Electronics Corporation., hm5216805 Datasheet - Page 44

• Manufacturer Part Number: hm5216805
• Description: 16 M Lvttl Interface Sdram 100 Mhz/83 Mhz 1-mword 8-bit 2-bank/2-mword 4-bit 2-bank - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HM5216805 Series, HM5216405 Series
AC Characteristics (Ta = 0 to 70 C, V
Parameter
Ref/Active to Ref/Active command period t
Active to Precharge command period
Active to precharge on full page mode
Active command to column command
(same bank)
Precharge to active command period
Write recovery or data-in to precharge
lead time
Active (a) to Active (b) command period
Transition time (rise to fall)
Refresh period
Notes: 1. AC measurement assumes t
Test Conditions
44
Input and output timing reference level: 1.4 V
Input waveform and output load: See following figures
input
2. Access time is measured at 1.40 V. Load condition is C
3. t
4. t
5. t
V SS
LZ
HZ
CES
2.8 V
(max) defines the time at which the outputs achieves the low impedance state.
(max) defines the time at which the outputs achieves the high impedance state.
defines CKE setup time to CKE rising edge except power down exit command.
t
T
T
= 1 ns. Reference level for timing of input signals is 1.40 V.
Symbol
t
t
t
t
t
t
t
t
RC
RAS
RASC
RCD
RP
DPL
RRD
T
REF
t
T
CC
, V
80%
20%
HM5216805/HM5216405
-10H
Min
90
60
—
30
30
15
20
1
—
CC
Q = 3.3 V 0.3 V, V
Max
—
120000
120000
—
—
—
—
5
64
I/O
L
= 50 pF with current source.
-12
Min
100
70
—
30
30
15
20
1
—
SS
CL
Max
—
120000
120000
—
—
—
—
5
64
, V
50
SS
Q = 0 V) (cont)
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ms
+1.4 V
Notes
1
1
1
1
1
1
1