HANBit
HMNR88D(V)
Power Down/Up Mode AC Waveforms
Power Down/Up AC Characteristics
Symbol
Parameter
VPFD (max) to VPFD (min) VCC Fall Time
HMNR88D
HMNR88DV
VPFD (min) to VPFD (max) VCC Rise Time
Min
300
10
Max
Unit
uS
uS
uS
uS
uS
uS
(2)
tF
(3)
tFB
VPFD (min) to VSS VCC Fall Time
150
10
tR
(4)
tREC
VPFD (max) to RST High
40
200
tRB
VSS to VPFD (min) VCC Rise Time
5
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
HMNR88D
HMNR88DV
HMNR88D
HMNR88DV
V
VPFD
Power-fail Deselect Voltage
2.9
3.0
V
3.0
V
VSO
Battery Back-up Switchover Voltage
VPFD-100mV
V
(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. 1.0 (April, 2002)
9
HANBit Electronics Co.,Ltd.
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
