PDM41256 Ver la hoja de datos (PDF) - Paradigm Technology

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PDM41256

256K static RAM 32K x 8-bit

Paradigm Technology 

PDM41256

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

Figure 1. Output Load Equivalent

DOUT

255Ω

+5V

480Ω

5 pF

Figure 2. Output Load Equivalent

(for tLZCE, tHZCE, tLZWE, tHZWE, tLZOE,

tHZOE)

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. 4.4 - 4/29/98

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