UT7C138C45WPC datasheet(16/21 Pages) AEROFLEX

Part #	UT7C138C45WPC

Description	4Kx8/9 Radiation-Hardened Dual-Port Static RAM with Busy Flag

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	AEROFLEX [Aeroflex Circuit Technology]

Direct Link	http://www.aeroflex.com

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16 / 21 page

DATA RETENTION CHARACTERISTICS (Pre-Radiation)

(TC = 25°C)

Notes:

1. CE equals VDR, all other inputs equal VDR or VSS.

2. Guaranteed but not tested.

SYMBOL

PARAMETER

MINIMUM

MAXIMUM

VDD @

2.5V

UNIT

VDR

VDD for data retention

2.5

IDDR

Data retention current

400

µA

EFR

1,2

Chip deselect to data retention time

1,2

Operation recovery time

tWC or tRC

VDD

DATA RETENTION MODE

4.5V

VDR 2.5V

Figure 6. Low VDD Data Retention Waveform

EFR

VIN < 1.5V CMOS

Notes:

1. 50pF including scope probe and test socket.

2. Measurement of data output occurs at the low to high or high to low transition mid-point

(CMOS input = VDD/2).

90%

Figure 7. AC Test Loads and Input Waveforms

Input Pulses

10%

< 5ns

460 ohms

VDD/2

50pF

CMOS

0.5V

VDD-0.5V

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