参数资料
型号: W948D6FBHX5E
厂商: Winbond Electronics
文件页数: 55/60页
文件大小: 0K
描述: IC LPDDR SDRAM 256MBIT 60VFBGA
标准包装: 312
格式 - 存储器: RAM
存储器类型: 移动 LPDDR SDRAM
存储容量: 256M(16Mx16)
速度: 200MHz
接口: 并联
电源电压: 1.7 V ~ 1.95 V
工作温度: -25°C ~ 85°C
封装/外壳: 60-TFBGA
供应商设备封装: 60-VFBGA(8x9)
包装: 托盘
W948D6FB / W948D2FB
256Mb Mobile LPDDR
8.5.2 Output Slew Rate Characteristics
PARAMETER
Pull-up and Pull-Down Slew Rate for Full Strength Driver
Pull-up and Pull-Down Slew Rate for Three-Quarter Strength Driver
Pull-up and Pull-Down Slew Rate for Half Strength Driver
Output Slew rate Matching ratio (Pull-up to Pull-down)
MIN
0.7
0.5
0.3
0.7
MAX
2.5
1.75
1.0
1.4
UNIT
V/ns
V/ns
V/ns
-
NOTES
1,2
1,2
1,2
3
Notes:
1.
2.
3.
Measured with a test load of 20 pF connected to V SSQ .
Output slew rate for rising edge is measured between VILD(DC) to VIHD(AC) and for falling edge between VIHD(DC) to VILD(AC).
The ratio of pull-up slew rate to pull-down slew rate is specified for the same temperature and voltage, over the entire temperature and
voltage range. For a given output, it represents the maximum difference between pull-up and pull-down drivers due to process variation.
8.5.3 AC Overshoot/Undershoot Specification
PARAMETER
Maximum peak amplitude allowed for overshoot
Maximum peak amplitude allowed for undershoot
The area between overshoot signal and VDD must be less than or equal to
The area between undershoot signal and GND must be less than or equal to
SPECIFICATION
0.5 V
0.5 V
3 V-ns
3 V-ns
8.5.4 AC Overshoot and Undershoot Definition
Overshoot Area
2.5
2.0
VDD
1.5
1.0
0.5
0
-0.5
Max Amplitude = 0.5V
Time
Max Area = 3V-ns
Undershoot Area
VSS
(ns)
Publication Release Date : Oct, 15, 2012
- 55 -
Revision : A01-004
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