HANBit
HMNR28D(V)
Power Down/Up Mode AC Waveforms
Power Down/Up AC Characteristics
Symbol
Parameter
VPFD (max) to VPFD (min) VCC Fall Time
HMNR28D
HMNR28DV
VPFD (min) to VPFD (max) VCC Rise Time
Min
Max
Unit
(2)
tF
300
10
150
10
40
5
uS
uS
uS
uS
uS
uS
(3)
tFB
VPFD (min) to VSS VCC Fall Time
tR
(4)
tREC
VPFD (max) to RST High
200
tRB
VSS to VPFD (min) VCC Rise Time
Note :
1. Valid for Ambient Operating Temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
2. VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring until 200µs after
VCC passes VPFD (min).
3. VPFD (min) to VSS fall time of less than tFB may cause corruption of RAM data.
Power Down/Up Trip Points DC Characteristics
Symbol
Parameter(1,2)
Min
4.2
2.7
Typ
4.35
Max
4.5
Unit
HMNR28D
HMNR28DV
HMNR28D
HMNR28DV
V
VPFD
Power-fail Deselect Voltage
2.9
3.0
V
3.0
V
V
Battery Back-up Switchover
Voltage
VSO
VPFD-100mV
(3)
TDR
Expected Data Retention Time
10
YEARS
Note: 1. All voltages referenced to VSS
.
2. Valid for Ambient Operating Temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
3. At 25°C.
URL : www.hbe.co.kr
Rev. 0.0 (March, 2002)
9
HANBit Electronics Co.,Ltd.
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
