32MB, 64MB, 128MB (x72, SR)
168-PIN SDRAM UDIMM
32, 64, 128MB x 64 SDRAM DIMM Micron Technology, Inc., reserves the right to change products or specifications without notice.
SD5C4_8_16x72AG.fm - Rev. C 6/04 EN
19 ©2004 Micron Technology, Inc. All rights reserved.
NOTE:
1. To avoid spurious START and STOP conditions, a minimum delay is placed between SCL = 1 and the falling or rising
edge of SDA.
2. This parameter is sampled.
3. For a reSTART condition, or following a WRITE cycle.
4. The SPD EEPROM WRITE cycle time (
t
WRC) is the time from a valid stop condition of a write sequence to the end of
the EEPROM internal erase/program cycle. During the WRITE cycle, the EEPROM bus interface circuit is disabled, SDA
remains HIGH due to pull-up resistor, and the EEPROM does not respond to its slave address.
Table 19: Serial Presence-Detect EEPROM DC Operating Conditions
All voltages referenced to VSS; VDDSPD = +2.3V to +3.6V
PARAMETER/CONDITION SYMBOL MIN MAX UNITS
SUPPLY VOLTAGE
V
DD 33.6V
INPUT HIGH VOLTAGE: Logic 1; All inputs
V
IH VDD x 0.7 VDD + 0.5 V
INPUT LOW VOLTAGE: Logic 0; All inputs
V
IL -1 VDD x 0.3 V
OUTPUT LOW VOLTAGE: I
OUTL = 3mA
V
OL –0.4V
INPUT LEAKAGE CURRENT: V
IN = GND to VDD
ILI –10µA
OUTPUT LEAKAGE CURRENT: V
OUT = GND to VDD
ILO –10µA
STANDBY CURRENT: SCL = SDA = V
DD - 0.3V;
All other inputs = GND or 3.3V ±10%
I
SB –30µA
POWER SUPPLY CURRENT: SCL clock frequency = 100 KHz
I
DD –2mA
Table 20: Serial Presence-Detect EEPROM AC Operating Conditions
All voltages referenced to VSS; VDDSPD = +2.3V to +3.6V
PARAMETER/CONDITION SYMBOL MIN MAX UNITS NOTES
SCL LOW to SDA data-out valid
t
AA 0.2 0.9 µs 1
Time the bus must be free before a new transition can start
t
BUF 1.3 µs
Data-out hold time
t
DH 200 ns
SDA and SCL fall time
t
F 300 ns 2
Data-in hold time
t
HD:DAT 0 µs
Start condition hold time
t
HD:STA 0.6 µs
Clock HIGH period
t
HIGH 0.6 µs
Noise suppression time constant at SCL, SDA inputs
t
I50ns
Clock LOW period
t
LOW 1.3 µs
SDA and SCL rise time
t
R0.3µs2
SCL clock frequency
f
SCL 400 KHz
Data-in setup time
t
SU:DAT 100 ns
Start condition setup time
t
SU:STA 0.6 µs 3
Stop condition setup time
t
SU:STO 0.6 µs
WRITE cycle time
t
WRC 10 ms 4
