M48T58_10 Datasheet, PDF (13/33 Pages) STMicroelectronics – 5.0 V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM

M48T58, M48T58Y
WRITE mode
Table 4. WRITE mode AC characteristics
Symbol
Parameter⁽¹⁾
M48T58/Y
Unit
Min
Max
t_AVAV
WRITE cycle time
70
ns
t_AVWL
Address valid to WRITE enable low
0
ns
t_AVE1L Address valid to chip enable 1 low
0
ns
t_AVE2H Address valid to chip enable 2 high
0
ns
t_WLWH WRITE enable pulse width
50
ns
t_E1LE1H Chip enable 1 low to chip enable 1 high
55
ns
t_E2HE2L Chip enable 2 high to chip enable 2 low
55
ns
t_WHAX WRITE enable high to address transition
0
ns
t_E1HAX Chip enable 1 high to address transition
0
ns
t_E2LAX Chip enable 2 low to address transition
0
ns
t_DVWH Input valid to WRITE enable high
30
ns
t_DVE1H Input valid to chip enable 1 high
30
ns
t_DVE2L
t_WHDX
t_E1HDX
t_E2LDX
t_WLQZ(2)(3)
t_AVWH
t_AVE1H
t_AVE2L
t_WHQX(2)(3)
Input valid to chip enable 2 low
WRITE enable high to input transition
Chip enable 1 high to input transition
Chip enable 2 low to input transition
Write enable low to output Hi-Z
Address valid to WRITE enable high
Address valid to chip enable 1 high
Address valid to chip enable 2 low
WRITE enable high to output transition
30
ns
5
ns
5
ns
5
ns
25
ns
60
ns
60
ns
60
ns
5
ns
1. Valid for ambient operating temperature: T_A = 0 to 70 °C; V_CC = 4.75 to 5.5 V or 4.5 to 5.5 V (except where
noted).
2. C_L = 5 pF.
3. If E1 goes low or E2 high simultaneously with W going low, the outputs remain in the high impedance
state.
Doc ID 2412 Rev 7
13/33