PDM41258LA7SO 查看數據表（PDF） - Paradigm Technology

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PDM41258LA7SO

256K Static RAM 64K x 4-Bit

Paradigm Technology 

PDM41258

Capacitance(1) (TA = +25°C, f = 1.0 MHz)

Symbol

Parameter

Max.

Unit

CIN

Input Capacitance

8

pF

COUT

Output Capacitance

8

pF

NOTE: 1.This parameter is determined by device characterization but is not production tested.

AC Test Conditions

Input Pulse Levels

Input rise and fall times

Input timing reference levels

Output reference levels

Output load

VSS to 3.0V

3 ns

1.5V

1.5V

See Figures 1 and 2

DOUT

255Ω

+5V

480Ω

30 pF

DOUT

255Ω

+5V

480Ω

5 pF

Figure 1. Output Load Equivalent

Figure 2. Output Load Equivalent

(for tLZCE, tHZCE, tLZWE, tHZWE)

Typical Delta tAA vs Capacitive Loading

5

4

3

2

1

0

0

30

60

90

120

Additional Lumped Capacitive Loading (pF)

Figure 3.

4

Rev. 2.2 - 4/27/98

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