HMNR28D Datasheet, PDF (9/13 Pages) Hanbit Electronics Co.,Ltd – 5.0 or 3.3V, 16K bit (2 Kbit x 8) TIMEKEEPER NVSRAM

HANBit
Power Down/Up Mode AC Waveforms
HMNR28D(V)
Power Down/Up AC Characteristics
Symbol
Parameter
Min
Max
Unit
tF(2)
VPFD (max) to VPFD (min) VCC Fall Time
300
uS
tFB(3)
VPFD (min) to VSS VCC Fall Time
HMNR28D
10
uS
HMNR28DV
150
uS
tR
tREC(4)
VPFD (min) to VPFD (max) VCC Rise Time
VPFD (max) to RST High
10
uS
40
200
uS
tRB
VSS to VPFD (min) VCC Rise Time
5
uS
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
Typ
Max Unit
VPFD
Power-fail Deselect Voltage
HMNR28D
4.2
HMNR28DV
2.7
4.35
4.5
V
2.9
3.0
V
Battery Back-up Switchover
HMNR28D
VSO
Voltage
HMNR28DV
3.0
V
VPFD-100mV
V
TDR(3)
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.